1.8L inline-4 Turbocharged Gas 170 Hp B5/B6 2000-2005
1.8L inline-4 Turbocharged Gas 170 Hp B5/B6 2000-2005
Audi A4 Quattro 1.8L Base Turbocharged Inline-4 B5/B6 Platform Guide (2000–2005)
In this Vehicle Platform Guide, you will find the top common issues of Audi A4 Quattro 1.8L TFSI (2000-2005) Inline-4 Turbocharged B5/B6, along with their fault codes, and the solutions from eEuroparts.com
The 2000–2005 Audi A4 Quattro (B5/B6) 1.8L TFSI is a sporty luxury sedan powered by a 1.8L turbocharged inline-4 gasoline engine, delivering between 148 to 170 horsepower and up to 210 Nm (155 lb-ft) of torque. Paired with a 5-speed manual or automatic transmission, it ensures smooth power delivery and responsive acceleration. Featuring Audi’s TFSI engine technology, it offers direct fuel injection, improved efficiency, and strong performance, making it ideal for daily driving, spirited handling, and all-weather traction with its Quattro AWD system.
Specifications
Engine and Powertrain
Engine:
1.8L Turbocharged Inline-Four (20V DOHC)
Engine Code:
AWM (B5); AMB (B6)
Transmission:
5-speed Tiptronic automatic or 5/6-speed manual
Fuel Type:
Gasoline
Horsepower:
170 hp at 5,900 rpm
Torque:
166 lb-ft at 1,950–5,000 rpm
Fuel Economy (EPA Estimates)
City/Highway Combined:
20–27 MPG (varies by model year and trim)
Vehicle Weight
Curb Weight:
3,550 to 3,660 lbs
Gross Weight:
4,650 to 4,850 lbs
Configurations and Submodels
Body Styles:
Sedan
Seating Capacity:
5 passengers
Drivetrain Options:
Quattro All-Wheel Drive (AWD)
Top Common Issues with Audi A4 Quattro 1.8L Base TFSI (2000-2005) Inline-4 Turbocharged B5/B6
Brake Light Switch
1. Brake Light Switch Failure
Fault Codes
The P0571 fault code indicates a problem with the cruise control brake switch circuit, often caused by a faulty brake pedal position sensor, damaged wiring, or misadjusted sensor.
Why it happens:
Brake light switch failure typically occurs due to wear and tear, electrical issues, mechanical failure, or misalignment, leading to malfunctioning brake lights and potential safety risks.
Symptoms:
Brake lights stay on-even when the pedal isn't pressed.
Brake lights won't turn on-leading to safety risks.
Car won't start-especially in push-button ignition vehicles.
Gear selector stuck in Park-due to interlock system failure.
ABS or traction control warning lights-indicating system issues.
Parts to Replace
Audi VW Brake Light Switch 1K2945511RDW The Genuine VW/Audi Brake Light Switch part number 1K2945511 RDW for Audi is a reliable and high-quality replacement part designed to ensure safety and reliability on the road.
Audi VW Brake Light Switch 4015013 The Brake Light Switch part number 4015013 is a reliable replacement option for your Audi or Volkswagen vehicle.
ABS sensor failure typically occurs due to corrosion, damaged wiring, sensor misalignment, or contamination, leading to inaccurate wheel speed readings and compromised braking performance.
Symptoms:
ABS warning light illuminated-indicates a fault in the system.
Pulsating brake pedal-caused by incorrect wheel speed readings.
Loss of anti-lock braking function-ABS system shuts down.
Loss of traction or stability control-affects handling in slippery conditions.
Parts to Replace
Front 8E0927803A The Audi Front ABS Wheel Speed Sensor (8E0927803A) is a high-quality OEM replacement designed for Audi A4 and S4 models.
Rear Passenger Side 8E0927807B The Audi Rear Passenger Side ABS Wheel Speed Sensor (8E0927807B) is a high-quality OEM replacement designed for Audi A4 and S4 models.
Bosch ABS Wheel Speed Sensor - Rear Part # 0265006681 The Bosch 0265006681 Rear ABS Wheel Speed Sensor is a high-quality OEM replacement designed for Audi models, ensuring accurate wheel speed readings for ABS and traction control systems.
Bosch Disc Brake Rotor Kit – Front (Part # 5232138) This high-quality Bosch rotor kit offers precision-balanced, zinc-coated rotors engineered to meet or exceed OE specifications. It delivers smooth, quiet braking with consistent friction surfaces, ensuring excellent stopping power and reduced vibration. Ideal for restoring factory-fresh braking performance on your Audi Q7.
C1210 (Front Brake Pad Wear Sensor Circuit), C1211 (Rear Brake Pad Wear Sensor Circuit), C1201 (Brake Pad Wear Indicator Active)
Why it happens:
Brake pads naturally wear down from friction every time the brakes are applied. Over time, heat, pressure, and driving habits (such as frequent city driving or aggressive braking) accelerate pad wear. Thin pads reduce stopping efficiency and trigger wear sensors.
Symptoms:
Squealing or grinding noise during braking – caused by worn pads contacting the rotor.
Vibration or pulsation – uneven wear or overheating causes pad material transfer to the rotor.
Brake warning light – triggered when the wear sensor detects low pad thickness.
Burning smell – excessive heat buildup from worn pads or aggressive braking.
Parts to Replace
Genuine VW/Audi Disc Brake Pad Set (Rear) 8E0698451L : OEM-quality pad set engineered for the Audi A4 2.0L, ensuring factory-fit performance and long life. Includes wear sensor compatibility for precise monitoring.
Bosch Disc Brake Rotor Kit – Front (Part # 5232138) This high-quality Bosch rotor kit offers precision-balanced, zinc-coated rotors engineered to meet or exceed OE specifications. It delivers smooth, quiet braking with consistent friction surfaces, ensuring excellent stopping power and reduced vibration. Ideal for restoring factory-fresh braking performance on your Audi Q7.
Suspension system faults typically occur due to worn shocks, damaged springs, misaligned wheels, failing bushings, or excessive vibrations, affecting ride quality.
Symptoms:
Excessive bouncing- vehicles continues to bounce after hitting bumps.
Uneven tire wear-indicates misalignment or worn suspension components.
Steering instability-difficulty maintaining control, especially at high speeds.
Clunking or knocking noises-caused by worn-out shocks, struts, or bushings.
Vehicle pulling to one side-often due to suspension misalignment or worn parts.
Rough or bumpy ride-loss of damping ability in shocks or struts.
Car sits unevenly-one side appears lower due to broken springs or worn components.
Parts to Replace
Front Lower Rearward 4D0407183AC The Audi VW Front Lower Rearward Control Arm Bushing (4D0407183AC) is a high-quality OEM replacement designed for Audi A4, A6, A8, and Volkswagen Passat, ensuring proper suspension function and ride stability.
Front Upper 4B0407515 The Audi Front Upper Control Arm Bushing (4B0407515) is a high-quality OEM replacement designed for Audi A4, A6, S4, and Allroad Quattro, ensuring proper suspension function and ride stability.
Rear Upper 8E0501541S The Audi Rear Upper Control Arm Bushing (8E0501541S) is a high-quality OEM replacement designed for Audi A4, S4, RS4, and Cabriolet models, ensuring proper suspension function and ride stability.
Rear Lower Outer 8E0505203D The Audi Rear Lower Outer Control Arm Bushing (8E0505203D) is a high-quality OEM replacement designed for Audi A4, A6, RS4, S4, and S6, ensuring proper suspension function and ride stability.
Lemforder 3089360 – Suspension Control Arm Kit (Front) is a complete OE-quality replacement kit designed for the Audi Q7’s front suspension. It includes premium forged control arms, ball joints, and bushings engineered for factory-fit precision and long-lasting performance. Replacing these components together ensures balanced suspension geometry and consistent handling.
Wheel bearing failure typically occurs due to lack of lubrication, contamination, improper installation, overloading, or poor-quality bearings, leading to excessive wear and noise.
Symptoms:
Grinding or grating noise-especially when accelerating or turning.
Humming or droning sound-gets louder with speed.
Steering instability-loose or unresponsive steering.
Uneven tire wear-caused by excessive wheel movement.
Vibrations in the steering wheel-especially at higher speeds.
Wheel play or wobbling-excessive movement when lifted.
ABS warning light-on vehicles with integrated ABS sensors.
Parts to Replace
OEM Audi VW Wheel Bearing Kit Front 8E0498625B The Audi VW Front Wheel Bearing Kit (8E0498625B) is a precision-engineered OEM replacement designed to ensure smooth rotation, minimize friction, and improve vehicle stability.
Bison Performance Wheel Bearing Front Part # BPWH02004 The Bison Performance BPWH02004 Front Wheel Bearing is a high-quality OEM replacement designed for Audi A4, S4, RS4, and Volkswagen Passat, ensuring smooth rotation and durability.
FAG Audi VW Wheel Bearing and Hub Assembly - Rear 803755C The Audi VW Rear Wheel Bearing and Hub Assembly (FAG 803755C) is a high-quality OEM replacement designed for Audi A4, A4 Quattro, S4, and Cabriolet models, ensuring smooth rotation and durability.
Shock absorber failure typically occurs due to fluid leaks, worn seals, corrosion, excessive vibrations, or internal mechanical wear, leading to reduced damping performance.
Symptoms:
Excessive bouncing- vehicle continues to bounce after hitting bumps.
Longer stopping distances-braking takes more time due to reduced tire contact.
Steering instability-difficulty maintaining control, especially at high speeds.
Clunking or knocking noises-caused by worn-out shocks or struts.
Nose diving when braking-front end dips excessively during hard braking.
Squatting when accelerating-rear end lowers more than usual.
Fluid leaks-visible oil or hydraulic fluid leaking from the shock absorber.
Parts to Replace
Front 8E0413031CC The Audi Front Shock Absorber (8E0413031CC) is a high-quality OEM replacement designed for Audi A4 and S4 models, ensuring smooth ride quality and suspension performance.
Rear 312784 The Sachs 312784 Rear Shock Absorber is a high-quality OEM replacement designed for Audi A4 models, ensuring smooth ride quality and suspension performance.
KYB Audi Shock Absorber - Rear 341814 The KYB 341814 Rear Shock Absorber is a high-quality OEM replacement designed for Audi A4 models, ensuring smooth ride quality and suspension performance.
Front (B6 Performance) Part # 24-065146 The Bilstein Shock Absorber part number 24-065146 is the perfect replacement for your Audi vehicle’s worn-out shock absorbers.
Sway bar link failure typically occurs due to worn bushings, corrosion, excessive stress, improper installation, or impact damage, leading to poor vehicle stability.
Symptoms:
Clunking or popping noises-especially when driving over bumps.
Excessive body roll-vehicle leans more than usual when turning.
Poor handling-loose steering or drifting in corners.
Unusual vibrations-felt in the steering wheel or cabin.
Uneven tire wear-caused by instability in the suspension.
Parts to Replace
Front Passenger Side 8E0411318 The Audi Front Passenger Side Sway Bar End Link (8E0411318) is a high-quality OEM replacement designed for Audi A4, S4, and RS4 models, ensuring proper suspension function and ride stability.
Rear 8E0505465AF The Audi Rear Sway Bar End Link (8E0505465AF) is a high-quality OEM replacement designed for Audi A4, S4, and RS4 models, ensuring proper suspension function and ride stability.
Front (Driver Side) BPSS02052 The Bison Performance Suspension Stabilizer Bar Link, part number BPSS02052, is designed to effectively reduce body roll and improve handling for your Audi.
Rear BPSS02053 The Bison Performance Suspension Stabilizer Bar Link part number BPSS02053 is the perfect addition to any Audi owner’s car parts collection.
Fault codes P0300–P0304 indicate engine misfires caused by issues with ignition, fuel, compression, or sensors, leading to rough performance.
Why it happens:
Coil pack failure typically occurs due to heat damage, electrical faults, worn-out insulation, or excessive vibration, leading to misfires and poor engine performance.
Symptoms:
Engine misfires-causing rough idling, hesitation, or jerking while driving.
Check Engine Light (CEL)-often triggered by ignition system faults.
Reduced fuel efficiency-a faulty coil pack can lead to increased fuel consumption.
Loss of power-acceleration feels sluggish, especially under load.
Hard starting-the engine struggles to start or cranks longer than usual.
Unusual engine sounds-popping, backfiring, or louder-than-normal operation.
Parts to Replace
Hitachi Audi VW Ignition Coil IGC0149 This Hitachi Direct Ignition Coil (Part Number IGC0149) is a great replacement for your Audi or Volkswagen’s ignition system.
Bosch Audi Ignition Coil- 0986221024 The Bosch direct ignition coil part number 0986221024 is a replacement part for Audi and Volkswagen cars and is designed for reliable and efficient performance, and is compatible with part numbers 06A905115D and 06B905115N.
NGK Audi Ignition Coil 48843 The NGK (48843) Ignition Coil is a COP (Coil-On-Plug) pencil-type ignition coil designed for Audi and Volkswagen models, ensuring reliable spark delivery for optimal engine performance.
The Bosch Ignition Coil Kit – Part #5113289 is designed as a direct-fit OE-quality solution for the Audi Q7’s gasoline engines. It delivers precise voltage output and improved insulation to ensure consistent spark energy and reliability under all driving conditions. When replacing ignition coils, it’s best practice to install a complete set to maintain balanced performance across all cylinders
Fault code P0685 indicates an ECM/PCM power relay control circuit open, often caused by a faulty relay, damaged wiring, or a blown fuse.
Why it happens:
Ignition switch failure typically occurs due to wear and tear, electrical overload, corrosion, or faulty internal contacts, leading to starting issues.
Symptoms:
Car won’t start-turning the key doesn’t engage the starter.
Engine stalls while driving-sudden loss of power due to switch failure.
OE Supplier Audi Ignition Switch 4B0905849 The OE Supplier 4B0905849 Ignition Switch is a replacement ignition starter switch designed for Audi, Porsche, and Volkswagen models, ensuring reliable electrical operation.
URO Audi Ignition Switch 4B0905849 The URO 4B0905849 Ignition Switch is an aftermarket replacement designed for Audi, Porsche, and Volkswagen models, ensuring reliable electrical operation.
Dorman Ignition Switch Part # 924-728 The Dorman 924-728 Ignition Switch is a direct replacement designed for Audi and Volkswagen models, ensuring reliable electrical operation.
Fault codes P0335 and P0322 indicate crankshaft position sensor or ignition circuit failures, causing starting issues, stalling, rough idling, and misfires.
Why it happens:
Crankshaft position sensor failure typically occurs due to engine overheating, wiring issues, sensor wear, or internal circuit damage, leading to poor ignition timing.
Symptoms:
Check Engine Light-often triggered by sensor malfunction.
Hard starting or no start-engine struggles to turn over.
Intermittent stalling-engine shuts off unexpectedly while driving.
Rough idling and vibrations-due to incorrect timing signals.
Reduced engine performance-loss of power and poor acceleration.
Misfires-leading to poor fuel efficiency and rough running.
OEM Audi Crankshaft Position Sensor 071957147 The Audi VW Crankshaft Position Sensor (071957147) is a genuine OEM replacement designed for Audi and Volkswagen models, ensuring accurate engine timing and fuel injection control.
Bosch Audi Crankshaft Position Sensor 0261210177 The Bosch 0261210177 (071957147) Crankshaft Position Sensor is a high-quality OEM replacement designed for Audi and Volkswagen models, ensuring accurate engine timing and fuel injection control.
Hella Engine Crankshaft Position Sensor Part # 009146391 The HELLA 009146391 Crankshaft Position Sensor is an OEM replacement designed for Audi and Volkswagen models, ensuring accurate engine timing and fuel injection control.
Power steering pump failure typically occurs due to fluid leaks, worn bearings, belt issues, contamination, or overheating, leading to loss of steering assist and increased effort while turning.
Symptoms:
Heavy or stiff steering-requires extra effort to turn the wheel.
Squealing or whining noises-especially when turning the steering wheel.
Jerky or rough steering-inconsistent steering response.
Knocking or groaning sounds-indicates internal pump damage.
Leaking power steering fluid-visible puddles under the vehicle.
Metal flakes in fluid-sign of internal wear and contamination.
Fuchs 800354174 Power Steering Fluid – Specifically formulated for Audi hydraulic systems, this fluid maintains optimal viscosity under extreme temperatures and prevents foaming and corrosion. It meets OEM specifications and ensures quiet operation and long-term protection for the steering pump and rack.
Tie rod end wear typically occurs due to lack of lubrication, impact damage from potholes or curbs, corrosion, or general wear over time, leading to loose steering and poor alignment.
Symptoms:
Loose or unresponsive steering-excessive play in the steering wheel.
Steering wheel vibrations-especially at higher speeds.
Uneven tire wear-caused by misalignment.
Clunking or knocking noises-heard when turning or driving over bumps.
Vehicle pulling to one side-due to improper wheel alignment.
Audi VW Steering Tie Rod End - Front (Outer) BPSS02043 One of the key benefits of the Bison Performance Steering Tie Rod End part is its durability. Made from high-quality materials, this part is built to last, even in tough driving conditions.
Outer Part # ES3646 The Moog Steering Tie Rod End, part number ES3646, is a high-quality replacement part designed specifically for Audi and Volkswagen models.
Audi Tie Rod - Front Inner 2557101 The Audi Front Inner Tie Rod – Lemfoerder 2557101 is a high-quality OEM replacement designed for Audi A4, S4, and RS4 models.
Steering knuckle failure typically occurs due to impact damage from potholes or curbs, corrosion, worn bushings, or road debris, leading to misalignment and handling issues.
Symptoms:
Uneven tire wear-caused by misalignment.
Vehicle pulling to one side-even when the steering wheel is centered.
Steering wheel vibrations-especially at high speeds.
Clunking or grinding noises-heard when turning or driving over bumps.
Delayed steering response-reduced precision in handling.
Brake performance issues-vibration or uneven braking force.
Parts to Replace
Front Passenger Side 8E0407254H The Genuine VW/Audi Steering Knuckle part number 8E0407254H / 8E0-407-254-H is the perfect replacement part for your Audi.
Front Driver Side 8E0407253H The Genuine VW/Audi Steering Knuckle part number 8E0407253H / 8E0-407-253-H for Audi is a reliable and high-quality replacement part that ensures optimal steering performance.
P0011 indicates intake camshaft timing over-advanced, while P0012 refers to intake camshaft timing over-retarded, both affecting engine performance and efficiency.
Why it happens:
Camshaft adjuster failure typically occurs due to wear and tear, oil contamination, poor maintenance, or design flaws, leading to timing issues and reduced engine performance.
Symptoms:
Rattling noise – Especially during cold starts, indicating improper camshaft positioning.
Check engine light activation – Often triggered by timing-related issues.
Reduced engine performance – Sluggish acceleration or rough idling.
Poor fuel efficiency – Inefficient engine operation due to timing misalignment.
Engine Timing Camshaft Gear (Exhaust) Part # 06B109111 The Genuine VW/Audi Engine Timing Camshaft Gear part number 06B109111 for Audi is an essential component for maintaining the proper functioning of your vehicle’s engine.
Fel-Pro TCS Engine Camshaft Seal Kit (Front) 46005 provides a durable, precision-fit sealing solution designed to prevent oil leaks, protect engine performance, and ensure reliable operation in demanding driving conditions.
Engine Timing Belt – Genuine VW/Audi 058109119C – High-quality OE component designed for precise timing synchronization, ensuring smooth camshaft-to-crankshaft alignment and long-term reliability
Oil sludge buildup typically occurs due to oxidation, prolonged exposure to high temperatures, infrequent oil changes, and contamination, leading to thick deposits that reduce engine efficiency.
Symptoms:
Reduced engine performance – Sludge restricts oil flow, leading to sluggish acceleration.
Dark, thick oil – Oil appears contaminated and sticky.
Knocking or ticking noises – Insufficient lubrication causes internal friction.
Parts to Replace
Audi VW Engine Oil Pump 06A115105B The Genuine VW/Audi Engine Oil Pump part number 06A115105B is an essential component for the optimal performance of your Audi vehicle.
P0102 indicates low voltage in the mass airflow (MAF) sensor circuit, while P0103 refers to high voltage in the MAF sensor circuit, both affecting air-fuel mixture and engine performance.
Why it happens:
Mass air flow sensor failure typically occurs due to contamination, electrical faults, aging components, or improper airflow, leading to inaccurate air-fuel mixture readings.
Symptoms:
Rough idling or engine stalling – The engine may run unevenly or shut off unexpectedly.
Slow acceleration – Hesitation or sluggish response when pressing the gas pedal.
Check engine light activation – The ECU detects airflow-related issues.
Black smoke from the exhaust – Excess fuel burning due to inaccurate sensor readings.
Parts to Replace
Audi Mass Air Flow Sensor (Rebuilt) 06A906461LX The Audi VW Mass Air Flow (MAF) Sensor with part number 06A906461LX is a crucial component that measures the amount of air entering the engine, helping the ECU optimize fuel injection for performance and efficiency.
NTK Audi Mass Air Flow Sensor MG0036 The NTK Mass Air Flow Sensor part number MG0036 is a reliable and high-quality replacement part for your Audi, Porsche, or Volkswagen vehicle.
Bosch Audi VW Mass Air Flow Sensor (New) 0280218063 The Bosch 0280218063 is a brand-new OEM Mass Air Flow (MAF) sensor that directly replaces part number 06A906461LX, commonly used in various Audi and Volkswagen 1.8T models.
Hella Audi Mass Air Flow Sensor 009149051 The Hella 009149051 is a new OEM-quality Mass Air Flow (MAF) sensor designed to replace part numbers like 06A906461L and 06A906461LX,
P0171 means the engine runs lean; P0172 means it runs rich-both suggest air-fuel imbalance from sensor or system faults.
Why it happens:
PCV system failure typically occurs due to clogged or brittle hoses, stuck valves, or age-related wear that disrupts crankcase ventilation and pressure balance.
Symptoms:
Rough idle or fluctuating RPMs
Check Engine Light illuminated (often with codes like P0171 or P0172)
Engine misfires, especially at idle or during acceleration
Oil leaks due to increased crankcase pressure blowing out seals or gaskets
Increased oil consumption or visible blue smoke from the exhaust
Whistling or hissing noises from the engine bay (from stuck valves or cracked hoses)
Poor fuel economy and sluggish performance
Parts to Replace
Audi PCV Valve 035103245A The Genuine VW/Audi PCV Valve part number 035103245A for Audi is the perfect replacement for your old or worn-out PCV valve.
Dorman Audi VW PCV Valve 911400 The Dorman – OE Solutions PCV Valve part number 911-400 is the perfect replacement for your worn-out or damaged PCV valve in your Audi or Volkswagen vehicle.
Fault code P0299 means the turbocharger or supercharger isn’t producing enough boost pressure, often due to leaks, sensor faults, or mechanical failure.
Why it happens:
Turbocharger failure typically occurs due to oil starvation, oil contamination, or foreign object damage, often worsened by poor maintenance or harsh driving habits.
Symptoms:
Loss of power-acceleration feels sluggish, especially at higher speeds.
Excessive exhaust smoke-blue or gray smoke indicates oil burning inside the turbo.
Whining or rattling noises-a damaged turbo may produce high-pitched sounds.
Check Engine Light (CEL)-often triggered by underboost (P0299) or airflow issues.
Parts to Replace
Part # (K04 Upgrade) - 53049887500 The Borg Warner Turbocharger part number 5304-988-7500 is a high-performance replacement turbocharger designed for Audi and Volkswagen vehicles.
New 030TC14665000 The Mahle 030TC14665000 is a new K04 turbocharger designed for Audi and Volkswagen 1.8T engines, offering increased power and efficiency
Nissens Audi Turbocharger 93021 The Nissens Turbocharger part number 93021 is designed to provide reliable and efficient performance for Audi and Volkswagen models.
Dorman Audi VW Turbocharger 917150 The Dorman – OE Solutions Turbocharger part number 917-150 is a high-quality replacement part that is compatible with a range of Audi and Volkswagen models.
P0201–P0204 indicate fuel injector circuit issues, causing misfires, P0300–P0304 refer to random or cylinder-specific misfires, affecting performance and emissions.
Why it happens:
Fuel injector failure typically occurs due to fuel contamination, clogging, electrical issues, or wear in internal components, leading to misfires and poor engine performance.
Symptoms:
Rough idling or engine stalling – Uneven fuel delivery can make the engine run erratically.
Engine misfires – A clogged or faulty injector can disrupt combustion.
Poor acceleration – Reduced fuel flow affects power output.
Strong fuel odor – Leaking injectors may cause excess fuel smell.
Check engine light activation – The ECU detects injector-related issues.
Parts to Replace
Bosch Audi VW Fuel Injector 62674 The Audi VW Fuel Injector 06B133551M – Bosch 62674 is a high-quality OEM replacement designed for precise fuel delivery and optimal engine performance.
GB Reman Audi VW Fuel Injector (Rebuilt)-8522185 The Audi VW Fuel Injector (Rebuilt)– GB Reman 8522185 is a remanufactured OEM replacement designed for precise fuel delivery and optimal engine performance. Brands
Fault code P0615 indicates a starter relay circuit issue, often due to wiring faults or a bad relay, while P0688 signals an ECM/PCM power relay failure, possibly caused by a defective relay or blown fuse.
Why it happens:
Starter failure typically occurs due to worn-out brushes, solenoid issues, electrical faults, or mechanical wear, often worsened by poor connections or overheating.
Symptoms:
Clicking noise when turning the key, but the engine doesn’t crank.
Slow or weak cranking-the engine struggles to turn over.
Intermittent starting issues-sometimes it works, sometimes it doesn’t.
Smoke or burning smell-indicating electrical overheating.
Oil-soaked starter-caused by leaks, leading to premature failure.
Dash lights on, but no engine response-suggesting starter motor failure.
Valeo Audi VW Starter Motor (New) 438072 The Valeo 438072 is a new starter motor designed to replace Audi VW part number 06B911023X, offering reliable performance for 1.8T engines.
Denso Audi Starter Motor 2806111 The Denso 2806111 is a starter motor designed to replace Audi VW part number 06B911023X, ensuring reliable engine cranking for various 1.8T models.
Fault code P0562 indicates low system voltage, often caused by a failing alternator, weak battery, or wiring issues, leading to electrical malfunctions.
Why it happens:
Alternator failure typically occurs due to normal wear and tear, overheating, electrical resistance, faulty wiring, or excessive charging demands, leading to power loss
Symptoms:
Battery warning light-dashboard indicator showing charging system issues.
Dim or flickering headlights-inconsistent power supply.
Dead battery-alternator failing to recharge it.
Malfunctioning accessories-windows, radio, or seat warmers working erratically.
Difficulty starting or stalling-engine struggling due to low voltage.
Strange noises-grinding or whining from a failing alternator bearing.
Burning smell-overheated alternator or damaged wiring.
Parts to Replace
OEM Audi Alternator (150A) (Rebuilt) 06D903016X The Audi Alternator (150A) (Rebuilt) 06D903016X is a remanufactured OEM alternator designed for Audi A4, S4, RS4, and Cabriolet models. It ensures proper battery charging and electrical system functionality.
Audi Alternator (150A) (New) AL0825N The Bosch AL0825N (06D903016X) Alternator is a brand-new 150A OEM replacement designed for Audi A4, S4, RS4, and Cabriolet models, ensuring reliable battery charging and electrical system performance.
Audi Alternator (150A) (Rebuilt)- AL0825X The Bosch AL0825X (06D903016X) Alternator is a remanufactured 150A OEM replacement designed for Audi A4, S4, RS4, and Cabriolet models, ensuring reliable battery charging and electrical system performance.
Valeo Audi Alternator (150A) (New) 439498 The Valeo 439498 (06D903016X) Alternator is a brand-new 150A OEM replacement designed for Audi A4 B6/B7 models, ensuring reliable battery charging and electrical system performance.
Fault codes P0730–P0736 indicate incorrect gear ratio issues in the transmission, often caused by low fluid, faulty solenoids, or internal mechanical failures.
Why it happens:
Tiptronic transmission slippage typically happens due to low ATF levels, worn clutch packs, faulty solenoids, or torque converter issues.
Symptoms:
Delayed or rough gear shifts-gears hesitate or feel jerky.
RPM spikes without acceleration-engine revs but speed doesn’t increase.
Transmission overheating-caused by excessive friction.
Loss of power-vehicle struggles to accelerate.
Torque converter shudder-vibrations during gear changes.
Check Engine or Transmission warning light-indicating internal issues.
Parts to Replace
Audi VW Gear Oil (1L) G052911A2 The Audi VW Gear Oil (75W90) (1L) G052911A2 is a manual transmission fluid designed for Volkswagen, Audi, SEAT, and Škoda vehicles, ensuring smooth gear shifts and optimal lubrication.
Part # 52285606 The Valeo 52285606 Clutch Kit is a high-quality OEM replacement designed for Audi A4, A4 Quattro, and Volkswagen Passat, ensuring smooth gear engagement and durability.
Clutch slave cylinder failure typically occurs due to fluid leaks, worn seals, contamination, overheating, or internal mechanical wear, leading to shifting issues
Symptoms:
Soft or spongy clutch pedal-pedal feels weak or sinks to the floor.
Difficulty shifting gears-trouble engaging or disengaging gears.
Leaking clutch fluid-visible fluid under the vehicle or near the cylinder.
Contaminated clutch fluid-dark or dirty fluid affecting hydraulic pressure.
Grinding or squeaking noises-unusual sounds when pressing the clutch.
Clutch pedal sticking-pedal fails to return to its normal position.
Parts to Replace
OEM Audi Clutch Slave Cylinder 8E0721257M The Genuine VW/Audi Clutch Slave Cylinder part number 8E0721257M for Audi is an essential component in the smooth functioning of your vehicle’s clutch system.
Luk Audi Clutch Slave Cylinder LSC315 The LuK Clutch Slave Cylinder part number LSC315 is a high-quality replacement component for Audi, Porsche, and Volkswagen vehicles.
Part # SH6546 The SACHS SH6546 Clutch Slave Cylinder is a high-quality OEM replacement designed for Audi, Volkswagen, and Porsche models, ensuring smooth clutch operation and reliable performance.
Cylinder KN22066A1 The FTE KN22066A1 Clutch Slave Cylinder is a high-quality OEM replacement designed for Audi, Volkswagen, and Porsche models, ensuring smooth clutch operation and reliable performance.
Cylinder 810656 The Valeo Clutch Slave Cylinder part number 810656 is a high-quality replacement part compatible with Audi, Porsche, and Volkswagen vehicles.
Transmission mount failure typically occurs due to rubber deterioration, excessive vibrations, fluid leaks, corrosion, or improper installation, leading to drivetrain misalignment.
Symptoms:
Excessive vibrations-felt throughout the vehicle, especially during acceleration.
Clunking or banging noises-when shifting gears or accelerating.
Engine movement-visible rocking or shifting under the hood.
Unusual shifting behavior-hard shifts, delayed engagement, or gear slipping.
Transmission misalignment-leading to poor drivetrain performance.
Driveshaft damage-causing additional vibrations and wear.
Increased engine noise-due to improper dampening.
Chassis flex-potential structural misalignment over time.
Parts to Replace
Rein Audi Manual Transmission Mount AVT0522 The Rein Manual Transmission Mount part number AVT0522 for Audi is a high-quality replacement part designed to provide excellent performance and durability.
OEM Audi Auto Trans Mount 8E0399105JD The Genuine VW/Audi Automatic Transmission Mount (Part # 8E0399105JD) is a high-quality replacement part that promises smooth and stable transmission operations for your Audi.
Window regulator failure typically occurs due to broken cables, worn-out guides, electrical faults, or excessive strain from frequent use, especially in extreme temperatures.
Symptoms:
Slow or uneven window movement-the window struggles to go up or down smoothly.
Grinding or clicking noises-indicating worn-out gears or cables.
Window drops or slides down-suggesting broken cables or damaged guide rails.
Inconsistent window operation-sometimes it works, sometimes it doesn’t.
Window refuses to stay up-it keeps sliding down due to faulty components.
Parts to Replace
Front Driver Side 8E0837461C The Audi Window Regulator with part number 8E0837461C is a front left (driver-side) regulator designed for Audi A4, S4, and RS4 models on the B6 and B7 chassis.
Rear Driver Side 8E0839461C The Audi Window Regulator with part number 8E0839461C is a rear left (driver-side) regulator designed for Audi A4, S4, and RS4 models.
Denso EVB-21 Wiper Blade (Front): Precision-engineered with a durable rubber compound and aerodynamic spoiler for consistent wiping performance. Designed to fit Audi vehicles seamlessly and maintain full windshield contact for optimal visibility
At eEuroparts.com, we know what it takes to keep your Audi A4 Quattro Base 1.8T running like it should-refined, responsive, and ready for any road. The B5/B6 generations are known for their turbocharged performance, balanced handling, and robust quattro system-and they deserve parts that match that legacy.
Exceptional Delivery, Unmatched Logistics
We know that every moment counts when your car is out of commission. That’s why we focus on getting your parts to you as quickly as possible. Our efficient logistics network and fast shipping mean minimal downtime for your vehicle.
Competitive Prices, Superior Value
Shopping at eEuroparts.com means you don't have to choose between quality and affordability. We offer a wide range of parts at the best prices, ensuring you get outstanding value without compromising on quality.
Trusted Excellence
Our catalog includes parts from top-tier brands like Bosch, INA, ZF, Pierburg, Elring, Lemförder, and Rein. Whether you're resolving transmission issues, electrical faults, or suspension wear, our parts meet or exceed OEM standards for fit, durability, and performance.
Conclusion
Your B5/B6 Audi A4 Quattro blends classic design, precise engineering, and all-season performance. Maintain it with expertly sourced parts, fast shipping, and responsive support. Whether you're fixing a cam adjuster rattle, replacing failing window regulators, or rebuilding suspension, eEuroparts.com is your trusted source.
Frequently Asked Questions
Why should I replace the timing belt and water pump?⌄
This engine uses a timing belt, not a chain. If it fails, it can cause valve/piston damage. Change belts, pulleys, and pump together.
Why is my A4 1.8T consuming oil or smoking?⌄
Oil sludge, worn rings, or leaking seals/gaskets often cause excessive oil use or blue smoke under boost.
Why does my turbo whistle or feel weak?⌄
Boost leaks (cracked hoses, poor clamps) or worn turbo internals reduce boost and cause whistling.
How do I avoid catastrophic failure on the 1.8T? ⌄
Stick to strict maintenance: timing belt service, oil changes, inspect vac/boost plumbing, replace aging gaskets and seals before failure.
Why do control arm bushings or suspension parts clunk? ⌄
Old rubber arms, bushings, or ball joints wear and lead to noise, looseness, and unstable handling.
What Customers Say on Trustpilot
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Apr 13, 2025Celebrating 25 Years of Excellence at eEuropartsSince its inception in 2000, eEuroparts has been dedicated to providing European car owners and enthusiasts throughout the United States with top-quality Genuine, OEM, and premium aftermarket parts. What started as a small passion project has evolved into a prominent player in the auto parts sector, renowned for its dependability, swift shipping, and unparalleled customer service. Over the years, we've successfully processed more than 20 million orders, ensuring that premium European parts are accessible no matter your location.
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