2.0L TFSI inline-4 Turbocharged Gas (248-252 Hp) B9 2017-2020
2.0L TFSI inline-4 Turbocharged Gas (248-252 Hp) B9 2017-2020
Audi A4 Quattro 2.0L TFSI Turbocharged B9 (2017–2020) Platform Guide
In this Vehicle Platform Guide, you will find the top common issues of Audi A4 Quattro 2.0L TFSI (2017-2020) Inline-4 Turbocharged B9, along with their fault codes, and the solutions from eEuroparts.com
The 2017–2020 Audi A4 Quattro (B9) 2.0L TFSI is a refined luxury sedan powered by a 2.0L turbocharged inline-4 gasoline engine, delivering 249 horsepower and up to 370 Nm (272 lb-ft) of torque. Paired with a 7-speed S tronic automatic transmission, it ensures smooth power delivery and responsive acceleration. Featuring Audi’s TFSI engine technology, it offers direct fuel injection, turbocharging, and intercooling, enhancing efficiency and performance. With Quattro AWD, it provides exceptional traction and stability, making it ideal for daily driving, spirited handling, and all-weather confidence.
Specifications
Engine and Powertrain
Engine:
2.0L Turbocharged Inline-4 (TFSI)
Engine Code:
EA888 Gen 3B
Transmission:
7-Speed S tronic Dual-Clutch (DL382)
Fuel Type:
Gasoline
Horsepower:
248–252 hp @ 5,000–6,000 rpm
Torque:
273 lb-ft @ 1,600–4,500 rpm
Fuel Economy (EPA Estimates)
City/Highway Combined:
24–34 MPG (varies by model year and trim)
Vehicle Weight
Curb Weight:
~ 3,318 – 3,627 lbs
Gross Weight:
~ 4,365 – 4,586 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 2.0L TFSI (2017-2020) Inline-4 Turbocharged B9
Disc Brake Pad Wear Sensor
1. Brake Pad Wear Sensor Malfunction
Fault Codes
The C1235 fault code indicates a right rear wheel speed sensor input signal missing, while C1236 refers to a left rear wheel speed sensor input signal missing, both affecting ABS functionality.
Why it happens:
Brake pad wear sensor malfunction occurs due to sensor misalignment, wiring issues, corrosion, excessive wear, or faulty installation, leading to inaccurate brake pad wear readings.
Symptoms:
Delayed braking response, making stopping less efficient.
Unusual noises, such as squeaking or grinding when braking.
ABS warning light illumination, signaling a potential issue.
Inconsistent brake performance, requiring more pressure to engage.
Parts to Replace
Front 8W0615121H The Audi Front Disc Brake Pad Wear Sensor (PART # 8W0615121H) is a Genuine Audi component designed for models like A4, A4 allroad, A5, A5 Sportback, A6, Q5, RS5, RS5 Sportback, S5 Sportback, and SQ5.
Front XHDZ065 The Audi Front Disc Brake Pad Wear Sensor (PART # XHDZ065) is a Genuine Audi component designed for models like A4, A4 allroad, A5, A5 Sportback, A6, Q5, RS5, RS5 Sportback, S5 Sportback, and SQ5.
Rear XHDZ066 The Audi Rear Disc Brake Pad Wear Sensor (PART # XHDZ066) is a Genuine Audi component designed for models like A4, A4 Quattro, A8 Quattro, Q7, Q8, RS6 Avant, RSQ8, S4, S8, and SQ7.
The C0035–C0041 series fault codes relate to wheel speed sensor issues, where C0035 indicates a left front wheel speed sensor fault, and C0041 refers to a right rear wheel speed sensor fault, both affecting ABS functionality.
Why it happens:
ABS wheel speed sensor failure occurs due to sensor wear, dirt buildup, electrical faults, corrosion, or impact damage, leading to inaccurate wheel speed readings.
Symptoms:
ABS warning light illumination, signaling a sensor issue.
Pulsating brake pedal, as the ABS system misinterprets wheel speed.
Loss of anti-lock braking, reducing braking efficiency.
Loss of traction or stability control, affecting handling in slippery conditions.
Parts to Replace
Audi ABS Wheel Speed Sensor - Front 4M0927803C The Front ABS Wheel Speed Sensor (PART # 4M0927803C) is a Genuine Audi component designed for models like A4, ensuring accurate wheel speed detection for ABS functionality.
Bosch ESI6-32N Brake Fluid – Part #1987479107: A premium synthetic brake fluid engineered for advanced braking systems like those in the Audi A4. It meets and exceeds DOT 3, DOT 4, and DOT 5.1 standards, providing exceptional thermal stability, anti-corrosion protection, and compatibility with rubber seals.
The C1011 fault code signals left front wheel speed sensor erratic performance, while C100A indicates front left wheel speed sensor circuit abnormality, affecting ABS.
Why it happens:
Parking brake actuator malfunction occurs due to worn brake pads, broken cables, faulty actuators, debris buildup, or electronic failures, preventing proper brake engagement.
Symptoms:
Dashboard warning lights, indicating a system issue.
Failure to engage or disengage, preventing proper parking brake function.
Unusual noises, such as grinding or clicking when activating the brake.
Vehicle rolling despite activation, reducing parking stability.
Parts to Replace
Audi Parking Brake Actuator - Rear 8W0998281 The Genuine VW/Audi Parking Brake Actuator part number 8W0998281 is a top-performing brake actuator that is specially designed for Audi vehicles.
Front lower control arm bushing failure occurs due to wear and tear, accidental damage, rough terrain, improper tightening, or sudden acceleration, leading to suspension instability.
Symptoms:
Reduced stability, making the vehicle feel less controlled at higher speeds.
Uneven tire wear, as misalignment affects road contact.
Steering wheel vibrations, especially during acceleration or braking.
Clunking or banging noises, caused by excessive play in the suspension.
Steering wander, where the vehicle pulls to one side.
Decreased braking performance, as suspension instability affects stopping power.
Parts to Replace
Front Lower Rearward 8K0407183G The Genuine VW/Audi Suspension Control Arm Bushing part number 8K0407183G is designed specifically for Audi vehicles.
Genuine VW/Audi 4E0407181B - Suspension Control Arm Bushing (Front Lower Outer Forward) The Genuine VW/Audi Suspension Control Arm Bushing part number 4E0407181B is a top-quality replacement for your Audi’s worn out or damaged control arm bushing.
Coil spring failure occurs due to overload, fatigue, corrosion, improper installation, manufacturing defects, environmental factors, or age-related wear, leading to suspension instability.
Symptoms:
Uneven tire wear, as suspension instability affects road contact.
Sagging ride height, making one side of the vehicle sit lower.
Excessive bouncing, especially over bumps or rough terrain.
Clunking or squeaking noises, indicating suspension stress.
Reduced handling and stability, making the vehicle feel unstable.
Parts to Replace
Rear Upper Part 4K0512149F The Genuine VW/Audi Coil Spring Retainer part number 4K0512149F is an essential component for Audi models that require a reliable and durable coil spring retainer.
Genuine VW/Audi 8K0511115DK - Coil Spring (Rear), part number 4M0412103A, is an essential component to ensure optimal performance of your Audi’s suspension system.
Rear shock absorber leaks occur due to brittle seals, rough terrain, accidents, dirt buildup, or worn-out shocks, leading to fluid loss and reduced suspension performance.
Symptoms:
Oil visible on the shock absorbers, indicating fluid leakage.
Excessive bouncing, making the ride feel unstable.
Uneven tire wear, as suspension instability affects road contact.
Rear 8W0513035AJ The Rear Shock Absorber (PART 8W0513035AJ) is a Genuine Audi component designed for models like A4, A5, S4, and S5, ensuring optimal suspension performance.
Fault codes P0300 and P0301–P0304 indicate engine misfire issues, where P0300 signals random/multiple cylinder misfires, and P0301–P0304 refer to misfires in specific cylinders.
Why it happens:
An ignition coil failure occurs due to overheating, voltage spikes, moisture intrusion, worn spark plugs, or electrical overload, leading to weak or inconsistent spark.
Symptoms:
Engine misfires – The engine may run unevenly or hesitate during acceleration.
Rough idling – The vehicle may shake or vibrate when stationary.
Check Engine Light activation – Diagnostic trouble codes related to ignition coil failure may appear.
Difficulty starting the engine – The engine may struggle to turn over or require multiple attempts to start.
Reduced fuel efficiency – Inefficient combustion can lead to increased fuel consumption.
Loss of power – The vehicle may feel sluggish or unresponsive, especially under load.
Parts to Replace
Bosch Audi Ignition Coil 06J905110K - 0986221072 The Bosch Direct Ignition Coil 0986221072 is an essential component for providing your Audi, Porsche, or Volkswagen with a reliable and powerful spark.
Beru Audi Ignition Coil ZSE137 The Volkswagen Audi Ignition Coil Beru ZSE137 is an OEM-quality ignition coil designed for Audi, Volkswagen, Bentley, Lamborghini, Seat, and Skoda models.
Eldor Audi Ignition Coil R1702C00200 The Eldor direct ignition coil (part number: R1702C00200) is designed for a range of Audi and Volkswagen vehicles.
NGK Ignition Coil Part # 49464 The Ignition Coil PART # 49464 is an NGK-manufactured ignition coil designed for Audi A3, A4, A5, A6, and Q3 models.
Steering knuckle failure occurs due to impact damage from potholes or curbs, corrosion from road debris, or deformed bushing attachment points, compromising suspension alignment.
Symptoms:
Clunking or grinding noises when turning, especially over bumps or uneven roads.
Steering wheel vibration or wobble, particularly at higher speeds.
Vehicle pulling to one side, even when the steering wheel is centered.
Uneven tire wear, often on one edge, due to misalignment.
Loose or unresponsive steering, making the vehicle feel unstable.
Brake performance issues, such as pulsation or uneven braking force.
Visible cracks, deformation, or corrosion on the knuckle itself.
Parts to Replace
Driver Side 8W0407253F The Genuine VW/Audi Steering Knuckle part number 8W0407253F / 8W0-407-253-F for Audi is a must-have for any car enthusiast looking to improve their vehicle’s steering performance.
Intermediate steering shaft noise typically occurs due to worn universal joints, lack of lubrication, corrosion, or misalignment, causing clunking or popping sounds when turning.
Symptoms:
Clunking or popping noises when turning the steering wheel, especially at low speeds.
Steering wheel play or looseness, where the wheel feels disconnected or delayed in response.
Binding or stiffness during turns, making steering effort inconsistent.
Vibration or shimmying in the steering wheel, particularly while cornering.
Difficulty returning to center, where the wheel doesn’t straighten smoothly after a turn.
Visible corrosion or wear on the shaft or U-joints, often accompanied by grease leakage.
Parts to Replace
Audi Steering Shaft 8W1419753B The Genuine VW/Audi Steering Shaft part number 8W1419753B is a high-quality replacement part for your Audi vehicle.
Fault codes P2181 and P0087 indicate cooling system and fuel pressure issues, where P2181 signals cooling system performance problems, and P0087 refers to low fuel rail pressure.
Why it happens:
A water pump leak occurs due to worn-out seals, corrosion, damaged impellers, loose mounting bolts, or failed bearings, leading to coolant loss and overheating.
Symptoms:
Coolant leaks – Visible puddles of coolant under the vehicle or dried coolant residue near the pump.
Engine overheating – Rising temperature gauge readings due to insufficient coolant circulation.
Whining or squealing noises – Unusual sounds from the front of the engine, often caused by worn bearings.
Steam from the engine bay – White smoke or steam escaping due to coolant leaking onto hot engine components.
Fluctuating temperature gauge – Inconsistent engine temperature readings, indicating cooling system inefficiency.
Parts to Replace
Audi Engine Water Pump 06L121012L The Genuine VW/Audi Engine Water Pump part number 06L121012L is specifically designed for Audi vehicles.
The P0016 and P0017 fault codes indicate a timing issue between the crankshaft and camshaft positions, often caused by misalignment, sensor malfunctions, or timing chain problems.
Why it happens:
Timing chain tensioner wear occurs due to factors like over-tightening, high engine temperature, oil pressure reduction, and general wear and tear, all of which can lead to improper chain tension and potential engine issues.
Symptoms:
Rattling or clicking noises from the engine, especially during cold starts.
Engine misfires due to improper timing between the crankshaft and camshaft.
Rough idling or fluctuating idle speed.
Poor acceleration and reduced engine performance.
Illuminated check engine light, often indicating timing-related issues.
Oil leaks around the timing cover due to tensioner failure.
Parts to Replace
Iwis Timing Chain Part # 50052407 The IWIS Engine Timing Chain Part Number 50052407 is a high-quality aftermarket product that is designed to meet or exceed the performance of the original equipment manufacturer (OEM) part.
P0101 (Mass Air Flow Sensor Performance) – Triggered when airflow entering the engine is inconsistent due to a clogged or restricted air filter, P0171 (System Too Lean, Bank 1) – Indicates the engine is receiving less filtered air, leading to incorrect fuel-to-air ratio.
Why it happens:
Over time, the engine air filter collects dust, pollen, road debris, and contaminants. When clogged or excessively dirty, airflow to the intake system is restricted, leading to poor engine performance and incorrect fuel mixture readings. A worn or improperly seated filter can also allow unfiltered air to bypass, contaminating the mass air flow sensor (MAF) and causing efficiency issues.
Symptoms:
Reduced Acceleration – Noticeable sluggish throttle response and lack of power under load.
Poor Fuel Economy – Increased fuel consumption due to the ECU compensating for restricted airflow.
Check Engine Light – Triggered by MAF or lean condition codes (P0101, P0171).
Engine Misfires or Rough Idle – Caused by inconsistent airflow reaching the combustion chambers.
Unusual Engine Noises – Whistling or hissing may occur if the filter housing isn’t sealed correctly.
Parts to Replace
Wix Engine Air Filter WA10866 – High-quality filter engineered for the Audi A4 2.0L, designed to trap fine particles while ensuring optimal airflow and fuel efficiency.
P0300–P0304 indicate random or specific cylinder misfires; P2293 signals fuel pressure regulator issues, causing rough idling and poor performance.
Why it happens:
Fuel injector coking happens when high engine temperatures and poor-quality fuel cause carbon deposits to form on injector tips, disrupting spray patterns.
Symptoms:
Rough idling or engine stalling, especially at stoplights or when starting cold.
Engine misfires, causing hesitation or jerking during acceleration.
Poor fuel economy, as the engine compensates for uneven fuel delivery.
Check engine light, often triggered by misfire or lean/rich mixture codes.
Strong fuel odor, due to incomplete combustion or leaking injectors.
Increased emissions, potentially leading to failed emission tests.
Hard starting, especially after the engine has been off for a while.
Parts to Replace
Genuine VW/Audi 06L906036AH - The Audi Fuel Injector (PART 06L906036AH) is a Genuine Audi component designed for models like A3, A4, A5, A6, Q7, TT, and S3, ensuring precise fuel delivery for optimal engine performance.
GB 8-070 - Fuel Injector Seal Kit is an GB injector kit designed for Audi and VW models, ensuring optimal fuel delivery and engine performance.
Fault codes P0087, P0088, and P2293 indicate fuel system pressure issues, including low, high, and regulator performance faults, affecting engine efficiency.
Why it happens:
A High-Pressure Fuel Pump failure occurs due to fuel contamination, clogged injectors, excessive wear, poor lubrication, or incorrect injector timing, leading to reduced fuel delivery.
Symptoms:
Delayed engine start – The engine takes longer to crank before starting.
Hesitation or sputtering during acceleration – Performance issues between 2000–4000 RPM.
High engine temperatures – Overheating due to improper fuel delivery.
Vehicle stalling – The engine may shut off unexpectedly under load or high temperatures.
Genuine VW/Audi Audi VW Engine Valve Lifter 022109423D Crafted for Audi vehicles, the Genuine VW/Audi Engine Camshaft Follower part number 022109423D is an exceptional car part designed to offer unparalleled performance.
P0340 and P0341 indicate camshaft position sensor issues, causing starting problems, misfires, rough idling, poor acceleration, and check engine light activation.
Why it happens:
Camshaft Position Sensor failure occurs due to electrical issues, sensor wear, oil contamination, overheating, or timing misalignment, leading to inaccurate engine timing and performance problems.
Symptoms:
Hard starting or failure to start due to incorrect timing signals.
Illuminated check engine light, often indicating camshaft-related trouble codes.
Engine misfires, leading to rough performance and hesitation.
Poor acceleration and sluggish engine response.
Rough idling or stalling at low speeds.
Transmission issues, such as improper gear shifts or slipping.
Reduced fuel efficiency due to incorrect fuel injection timing.
Parts to Replace
Bosch 5447972 - Engine Camshaft and Crankshaft Position Sensor Kit The Audi VW Camshaft Position Sensor 5447972 is a crucial component for monitoring camshaft position and ensuring proper engine timing.
P0562 (System Voltage Low) – Indicates insufficient battery voltage reaching the ECU and electrical systems, P068A (ECM/PCM Power Relay De-Energized Performance) – Signals inconsistent or interrupted battery power supply.
Why it happens:
The battery cable (part number 8K0915181D) is responsible for transferring current from the battery to the starter, alternator, and ECU. Over time, corrosion at the terminals, internal cable resistance, or physical wear can cause voltage drops. Heat, vibration, and exposure to moisture accelerate deterioration, leading to poor electrical conductivity and intermittent starting or charging issues.
Symptoms:
Hard starting or no start condition – Engine may crank slowly or fail to turn over due to insufficient current supply.
Intermittent electrical issues – Flickering dashboard lights, dim headlights, or malfunctioning accessories.
Battery warning light activation – The alternator cannot maintain proper charging through a compromised cable.
Loss of engine power – Weak or unstable current flow disrupts ECU signals, reducing performance.
Burnt or corroded cable ends – Visible signs of wear such as melted insulation, oxidation, or discoloration near the terminals.
Parts to Replace
Genuine VW/Audi Battery Cable 8S0915181C The Genuine VW/Audi Battery Cable part number 8S0915181C is a high-quality product designed to keep your Audi running smoothly.
Genuine VW/Audi Battery Cable Terminal End 4F0915519 is a durable OEM component designed to ensure secure electrical connectivity, stable power delivery, and long-lasting performance for your vehicle’s starting and charging system.
P0615 indicates a Starter Relay Circuit malfunction, while U0121 signals lost communication with the Starter Motor Control Module, affecting engine startup.
Why it happens:
Digital instrument cluster glitches occur due to electrical issues, software bugs, failing voltage regulators, loose connections, or sensor malfunctions, leading to inaccurate or flickering displays.
Symptoms:
Inaccurate readings, such as incorrect speed, fuel level, or engine temperature.
Flickering or dim display, making it difficult to read gauges.
Warning lights activating incorrectly, showing errors that don’t exist.
Frozen or stuck needles, preventing accurate monitoring of vehicle performance.
Complete cluster failure, where all gauges and displays stop working.
Intermittent operation, where the cluster works sporadically or resets unexpectedly.
Parts to Replace
Genuine VW/Audi Starter Motor 06L911021X The Audi Starter Motor 079911021G is a remanufactured genuine VW/Audi part designed for models like A4, A5, Q5, and A4 allroad.
Bosch Starter Motor SR0797X The Bosch SR0797X Starter Motor is an OEM replacement for various Audi models, including A4, A5, Q5, and A4 allroad.
Wheel bearings wear out over time due to constant rotational load, heat, and contamination from road debris or water intrusion. As the bearing degrades, it leads to excessive play in the wheel hub assembly, uneven rotation, and failure of the integrated wheel speed sensor (common in modern hub assemblies). This not only impacts drivability but can also trigger ABS/ESC fault codes.
Symptoms:
Grinding or humming noise – noticeable when driving at higher speeds, changing with wheel rotation.
Steering vibration – especially felt when cornering.
ABS light or ESC warning light – triggered by irregular wheel speed sensor readings.
Uneven tire wear – caused by wheel wobble from the failing hub.
Play in the wheel – noticeable looseness when rocking the wheel during inspection.
B10BE29 and B10BE07 indicate blower motor electrical and mechanical faults; U0424 signals invalid HVAC data disrupting climate control.
Why it happens:
HVAC blower motor failure typically occurs due to overheating from restricted airflow, worn bearings, electrical faults, or dirt buildup, leading to reduced performance.
Symptoms:
Weak or no airflow from vents, even when the system is on.
Unusual noises like grinding, squealing, or rattling from the blower area.
Burning or hot smells coming from the vents, often due to overheating.
Frequent circuit breaker trips, especially if the motor is seizing up.
Intermittent operation, where the blower works sporadically or shuts off unexpectedly.
Parts to Replace
MAHLE AB 315 000P - HVAC Blower Motor The MAHLE HVAC Blower Motor part number 4M1820021B for Audi is a high-quality replacement part that guarantees optimal performance and reliability.
The hood release cable is a mechanical linkage connecting the hood latch to the release handle inside the cabin. Over time, the cable can stretch, fray, corrode, or snap due to age, exposure to moisture, dirt buildup, or lack of lubrication at the latch. This prevents the latch from disengaging smoothly and can make opening the hood difficult or impossible.
Symptoms:
Hood won’t open – Pulling the release handle inside the car fails to disengage the latch.
Loose release handle – Handle feels slack or has no resistance when pulled.
Sticking or jammed hood latch – Requires multiple attempts or extra force to pop the hood.
Partial hood release – Hood pops up but doesn’t fully release due to stretched or weak cable tension.
Unusual resistance – Handle feels stiff, indicating corrosion or fraying inside the cable sheath.
The 2017–2020 Audi A4 Quattro 2.0L TFSI (B9) blends turbocharged efficiency, cutting-edge technology, and quattro all-wheel-drive confidence in a modern luxury sedan. At eEuroparts.com, we’re committed to keeping your B9 A4 performing at its peak with precision-fit, OE-quality parts at competitive prices.
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
Our catalog includes everything from timing chains, camshaft adjusters, and PCV valves to wheel bearings, control arms, and fuel pumps, sourced to meet or exceed OE standards. Whether you prefer genuine Audi parts or trusted aftermarket brands, we offer top-tier quality at better-than-dealer pricing.
Trusted Excellence
Our catalog includes parts from top-tier brands like Bosch, INA, ZF, Pierburg, Elring, Lemforder, 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
Built for dynamic performance and comfort, your B9 A4 deserves the right parts to match. Rely on eEuroparts.com for expertly curated selections, responsive customer service, and reliable shipping. Whether you're resolving engine management issues or replacing key suspension components, we're your go-to source for 2017–2020 Audi A4 Quattro 2.0T parts.
Frequently Asked Questions
Why does my A4 (B9) consume lots of oil?⌄
PCV/ventilation failures, worn piston rings, or leaking valve seals often drive high oil usage. (Common in modern 2.0Ts)
Why does the timing chain make noise at cold start?⌄
Loose tensioners or worn guides allow slack in the chain. Cold-start rattle and cam/crank error codes are red flags.
Why is my engine misfiring or stumbling under load?⌄
Bad coils, fouled spark plugs, or weak injectors often trigger misfires (P0300–P0304) and rough running.
Why do engine mounts or suspension bushings degrade early? ⌄
Under torque and road stress, mounts and bushings wear, causing vibration, knocking, or loose handling.
How can I avoid major engine repairs on a B9 2.0T?⌄
Stay proactive: change PCV, replace boost hoses early, monitor oil use, and service timing components before failure.
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