4.2L Quattro V8 Naturally Aspirated GAS (335 Hp); C6 2005-2011
4.2L Quattro V8 Naturally Aspirated GAS (335 Hp); C6 2005-2011
Audi A6 Quattro 4.2L V8 Naturally Aspirated (2005–2011) Platform Guide
In this Vehicle Platform Guide, you will find the top common issues of Audi A6 (2011) 4.2L Naturally-Aspirated V8 Quattro, along with their fault codes, and the solutions from eEuroparts.com
The 2011 Audi A6 4.2 FSI Quattro (C6) channels classic V8 charisma into a refined executive sedan, pairing naturally aspirated muscle with Audi’s signature all-wheel-drive confidence. Anchored in the C6 generation, this A6 variant features a longitudinally mounted 4.2-liter V8 engine mated to a 6-speed Tiptronic automatic transmission and Quattro permanent AWD. With 40 valves and FSI direct injection, the 4.2L V8 delivers smooth, high-revving performance and a rich exhaust note that sets it apart from its turbocharged successors.
Specifications
Engine and Powertrain
Engine:
4.2L Naturally Aspirated V8
Engine Code:
BHF / BVJ
Transmission:
6-Speed Tiptronic Automatic
Fuel Type:
Gasoline
Horsepower:
~335 hp at 6,800 rpm
Torque:
~317 lb-ft at 3,500 rpm
Fuel Economy (EPA Estimates)
City/Highway Combined:
15–22 MPG
Vehicle Weight
Curb Weight:
~ 3,847 lbs
Gross Weight:
~ 5,049 lbs
Configurations and Submodels
Body Styles:
sedan
Seating Capacity:
5 passengers
Drivetrain Options:
Quattro All-Wheel Drive (AWD)
Top Common Issues with Audi A6 (2011) 4.2L Naturally-Aspirated V8 Quattro
ABS Wheel Speed Sensor
1. ABS Wheel Speed Sensor Failure
Fault codes:
C0035–C0045 codes indicate wheel speed sensor faults; 01435–01438 signal brake pressure sensor errors, all disrupting ABS and stability control.
Why it happens:
ABS wheel speed sensor failure occurs from debris buildup, damaged tone rings, wiring faults, corrosion, impact, or internal sensor degradation over time.
Symptoms:
ABS warning light illuminates on the dashboard, indicating the system has detected a fault in one or more wheel sensors.
Brake pedal pulsates during braking, as the ABS misinterprets wheel speed data and activates unnecessarily.
Loss of anti-lock braking function occurs, increasing the risk of wheel lockup during hard stops.
Traction and stability control systems deactivate, reducing vehicle control on slippery or uneven surfaces.
Speedometer may stop working, especially in older vehicles that rely on wheel speed sensors for speed data.
Parts to Replace
Left 4E0927803F The Genuine VW/Audi ABS Wheel Speed Sensor is essential for maintaining optimal braking performance in your Audi vehicle.
Right 4E0927804F;OE Supplier 4E0927804F This premium-grade component is designed to meet or exceed OEM standards, providing reliable operation in your Audi or Volkswagen.
Right 0265007928 The Bosch ABS Wheel Speed Sensor is a crucial component for vehicles equipped with an Anti-lock Braking System (ABS).
Front and Rear Part # Hitachi 4063393 ABS sensor kit offers OE-level fit, precise speed data, enhanced braking, and stability for Audi models.
Disc brake pads gradually wear down from the constant friction against the brake rotors during normal driving. Aggressive driving, frequent stop-and-go traffic, or low-quality pad material can accelerate wear. If not replaced on time, worn pads reduce stopping efficiency and can damage the rotors.
Symptoms:
Squealing or grinding noise – High-pitched squeals or harsh grinding when braking, a clear sign pads are worn thin.
Longer stopping distances – Brakes feel weaker and require more pedal effort to slow down.
Brake warning light – Dashboard brake wear indicator or ABS light may illuminate when the wear sensor activates.
Vibration or pulsation – If pads wear unevenly, you may feel vibrations through the brake pedal during braking.
Visible wear – A quick inspection may show pad material less than 3mm thick.
The brake booster vacuum sensor monitors vacuum pressure inside the brake booster to ensure proper brake assist. With age, exposure to heat, or internal failure, the sensor can provide inaccurate readings. This leads to a mismatch between actual vacuum levels and the control module’s expectations, ultimately affecting braking performance.
Symptoms:
Hard brake pedal – You may notice the brake pedal feels unusually stiff, requiring more effort to stop the vehicle.
Inconsistent braking response – The brakes may work fine at times but suddenly feel weak or delayed, reducing driver confidence.
Illuminated Check Engine or Brake Warning Light – The sensor failure often triggers warning lights, signaling that braking assistance is compromised.
Hissing noise from the brake booster area – In some cases, vacuum leaks can be heard as a faint hissing sound during braking.
Reduced safety feel – Drivers may sense longer stopping distances, making the vehicle less predictable in emergency situations.
Parts to Replace
Standard Ignition Power Brake Booster Vacuum Sensor BST156: Reliable aftermarket option offering durability and precise feedback for brake booster operation.
Brands
Suspension Control Arm
1. Front Control Arm Failure
Why it happens:
Front control arm failure results from worn bushings, ball joints, corrosion, impact damage, overloading, or poor road conditions stressing suspension geometry.
Symptoms:
Clunking noises from the front suspension occur when bushings or ball joints are excessively worn.
Steering instability or wandering becomes noticeable, especially at higher speeds or during cornering.
Uneven tire wear develops due to misalignment caused by a compromised control arm.
Vibrations in the steering wheel intensify during acceleration or over rough terrain.
Poor handling response emerges, making the vehicle feel loose or unpredictable during maneuvers.
Parts to Replace
Front Lower 4F0407151A The Genuine VW/Audi Audi Control Arm - Front Lower 4F0407151A is an essential component of your vehicle's suspension system.
Front Driver Side Lower Rearward 4F0407693H The Genuine VW/Audi Audi Control Arm for the Front Driver Side Lower Rearward is an essential component for maintaining your vehicle's suspension system.
Front Driver Side Upper Forward 4E0407505E The Genuine VW/Audi Control Arm is a critical component designed specifically for the front driver side upper forward position of select Audi models.
Front Passenger Side Lower Rearward 4F0407694H The Genuine VW/Audi Audi Control Arm is a critical component for your vehicle's suspension system, specifically designed for the front passenger side lower rearward position.
Rear shock absorber leaks occur due to worn seals, corrosion, rough terrain, aging components, impact damage, or excessive suspension stress.
Symptoms:
Visible oil stains appear on the shock body or surrounding suspension components.
Rear-end bouncing increases noticeably when driving over bumps or uneven surfaces.
Uneven rear tire wear develops due to poor damping and inconsistent road contact.
Reduced braking stability occurs, especially during sudden stops or on rough terrain.
Rear squat during acceleration becomes more pronounced, affecting vehicle balance and comfort.
Parts to Replace
OEM Audi Shock Absorber - Rear 4F0513032AE The Genuine VW/Audi Audi Shock Absorber is a critical component for maintaining the ride quality and handling of your Audi vehicle.
Rear (B8 Performance Plus) - 24116312 The Bilstein Shock Absorber (B8 Performance Plus) is engineered to enhance your Audi's suspension performance, delivering superior handling and ride comfort.
Rear- 19139968 Enhance your Audi's ride quality and handling with the Bilstein Shock Absorber - Rear 4F0513032H. Engineered to OEM standards, this premium-grade shock absorber is designed to deliver exceptional performance and reliability.
Rear- 312640 The Sachs Shock Absorber for Audi vehicles is engineered to restore original handling dynamics while meeting the highest standards of safety, comfort, and performance.
Suspension warning light activates, alerting to system faults or pressure irregularities.
Parts to Replace
OEM Audi Suspension Air Compressor 4F0616005F The Genuine VW/Audi Air Suspension Compressor part number 4F0616005F is engineered to meet OEM standards, providing a reliable replacement for your Audi's air suspension system.
Audi Air Suspension Compressor- P2984 The Arnott Industries Air Suspension Compressor, part number P-2984, is engineered to provide reliable performance and a smooth ride for your Audi vehicle.
Wabco Audi Air Suspension Compressor 415 403 958 2 The WABCO Air Suspension Compressor, part number 415 403 958 2, is a vital component engineered to provide optimal air supply for the suspension system in Audi vehicles.
Hitachi Audi VW Ignition Coil IGC3831 The Hitachi IGC3831 direct ignition coil is a high-quality replacement part engineered to meet OEM standards, ensuring optimal performance for your Audi and Volkswagen vehicles.
NGK Volkswagen Audi Ignition Coil The NGK Ignition Coil U5014 is engineered to provide reliable ignition performance for a range of high-quality European vehicles, including models from Audi, Volkswagen, and Porsche.
Spark plugs are vital for igniting the air-fuel mixture in the cylinders. Over time, they wear out due to heat, carbon buildup, or electrode erosion. In turbocharged engines like the Audi A4 2.0L, stress is higher, causing plugs to foul or fail faster if not serviced regularly.
Symptoms:
Rough engine idle – The car may feel shaky at stoplights, almost like it’s struggling to stay running.
Hard starting – The engine may crank longer before finally starting, especially in colder weather.
Reduced power – Acceleration feels weak and sluggish, with noticeable hesitation when pressing the gas.
Misfires and vibrations – The engine may stumble or vibrate, often felt through the steering wheel or seats.
Poor fuel efficiency – Increased trips to the gas station as worn plugs cause incomplete combustion.
Check Engine Light – Misfire-related fault codes are often stored when plugs fail.
Power steering pump failure often results from fluid leaks, worn seals, dirty reservoir, belt issues, overheating, or low fluid pressure.
Symptoms:
Stiff Steering Wheel: The steering wheel becomes unusually hard to turn, especially at low speeds or when idling.
Whining or Groaning Noises: You hear high-pitched whining or groaning sounds when turning the wheel, often due to low fluid or internal wear.
Fluid Leaks: Reddish or amber-colored fluid may leak from the pump or hoses, leaving visible stains under the vehicle.
Jerky or Inconsistent Steering: Steering feels rough or unpredictable, with sudden changes in resistance while driving.
Steering Wheel Vibration: The wheel may vibrate or shake during turns, indicating pressure loss or internal pump damage.
Parts to Replace
Bosch Audi Power Steering Pump- KS01000709 Engineered to OEM standards, this premium-grade power steering pump efficiently forces hydraulic fluid into the steering mechanism, ensuring smooth and responsive steering.
The power steering return line hose carries fluid back to the reservoir after circulation through the system. Over time, the hose can degrade due to heat, fluid pressure, or age-related wear. Cracks, leaks, or loose fittings allow fluid to escape, reducing hydraulic pressure and making steering heavy or inconsistent.
Symptoms:
Visible fluid leaks – Puddles or damp spots of red/brown fluid beneath the car, especially near the front.
Heavy steering feel – Increased effort required to turn the wheel, most noticeable at low speeds.
Whining or groaning noise – A high-pitched sound when turning, caused by air entering the fluid system.
Low fluid levels – Reservoir dropping faster than normal, often accompanied by frequent top-ups.
Steering wheel vibration – Noticeable shudder when making sharp turns or holding the wheel at full lock.
P0300 indicates random misfires; P0301–P0308 specify misfires by cylinder; P1340 flags camshaft/crankshaft correlation fault, often timing-related.
Why it happens:
Rocker arm failure occurs from wear, poor lubrication, contaminated fuel, faulty injectors, or timing issues - causing misfires, noise, and power loss.
Symptoms:
Ticking or clicking noise from the top of the engine, especially near the valve cover, often increases with RPM.
Engine misfires occur when the rocker arm fails to properly actuate intake or exhaust valves, disrupting combustion timing.
Check engine light may illuminate due to performance irregularities detected by sensors, often linked to misfire or valve timing codes.
Reduced engine power and acceleration result from incomplete valve operation, affecting air-fuel mixture and exhaust flow.
Visible damage such as cracks or wear on the rocker arm may be seen during inspection, confirming mechanical failure.
Parts to Replace
OEM Audi VW Rocker Arm 06E109417P The Genuine VW/Audi Engine Rocker Arm, part number 06E109417P, is a vital component engineered specifically for Audi engines.
OEM Audi VW Engine Valve Lifter 022109423D The Genuine VW/Audi Engine Valve Lifter, part number 022109423D, is a premium-quality replacement designed specifically for Audi vehicles.
P0016, P0017, P0341, and P052A indicate cam/crank timing misalignment, sensor faults, or camshaft actuator performance issues.
Why it happens:
Timing chain failure stems from wear, poor lubrication, faulty tensioners, overheating, or low-quality parts - causing misalignment, noise, and engine damage.
Symptoms:
Rattling noise from the engine during startup or acceleration often signals a loose or stretched timing chain slapping against components.
Engine misfires occur when the chain disrupts valve timing, causing combustion events to happen out of sync.
Check engine light illuminates due to timing-related faults, often accompanied by diagnostic trouble codes like P0016 or P0017.
Poor engine performance and reduced fuel efficiency result from incorrect valve timing affecting air-fuel mixture and combustion.
Difficulty starting or engine stalling may happen if the chain jumps teeth or fails completely, disrupting crank-cam synchronization.
Parts to Replace
Audi VW Timing Chain 079109229 The Genuine VW/Audi Timing Chain 079109229 is an essential component designed to synchronize the rotation of your engine's crankshaft and camshafts, ensuring perfect valve timing.
Audi VW Timing Chain 079109229D The Genuine VW/Audi Timing Chain (Center Lower) 079109229D is an essential component for maintaining optimal engine performance in your Audi vehicle.
P0300–P0308, P0507, and P0171 suggest misfires, high idle, and lean condition—often caused by vacuum leaks or unmetered air.
Why it happens:
Valve failure occurs from overheating, poor lubrication, carbon buildup, improper lash, fatigue, corrosion, or piston contact—compromising sealing and compression.
Symptoms:
Loss of power and sluggish acceleration occur when valves fail to seal properly, reducing cylinder compression and combustion efficiency.
Rough idling and engine vibration result from uneven air-fuel flow caused by burnt or sticking valves.
Blue smoke from the exhaust indicates oil leaking past worn valve seals into the combustion chamber.
Hard starting or misfires stem from poor valve timing or sealing, disrupting ignition and fuel delivery.
Ticking or popping noises during acceleration suggest valve train wear, misalignment, or lash issues affecting valve operation.
Parts to Replace
OEM Audi VW Intake Valve 077109601Q The Genuine VW/Audi Engine Intake Valve part number 077109601Q is a premium-grade replacement component specifically engineered for Audi vehicles.
OEM Audi VW Valve Stem Seal 036109675A The Genuine VW/Audi Engine Valve Stem Oil Seal part number 036109675A is an essential component for maintaining the performance and longevity of your Audi vehicle.
Elring Audi Engine Valve Stem Oil Seal 724.590 The Elring Engine Valve Stem Oil Seal is a premium-grade component designed to ensure reliable engine performance in various European vehicles, including Audi, Volkswagen, Porsche, Bentley, and Lamborghini.
Passenger Side (MLS) 079103383BB The Genuine VW/Audi Cylinder Head Gasket is a crucial component for maintaining the performance and reliability of your Audi engine.
P0171, P0174, and P0507 indicate lean condition and high idle - often caused by vacuum leaks, faulty MAF, or throttle issues.
Why it happens:
Crankcase vent valve failure occurs from sludge buildup, diaphragm rupture, oil contamination, aging plastics, or excessive blow-by pressure stressing components.
Symptoms:
The engine may idle roughly or stall due to an imbalanced air-fuel mixture.
You might notice increased oil consumption without visible leaks.
Blue or white smoke can emit from the exhaust as oil enters the combustion chamber.
A whistling or hissing noise may be heard from the engine bay, indicating pressure buildup.
The check engine light often illuminates, triggered by stored fault codes like P0171 or P052E.
Parts to Replace
OEM Audi PCV Oil Separator 077103245B The Genuine VW/Audi Engine Crankcase Vent Valve, part number 079103464F, is crucial for maintaining the optimal performance of your Audi vehicle.
P0128 and P2181 indicate cooling system faults - often caused by stuck thermostats, low coolant, or faulty temperature sensors triggering poor regulation.
Why it happens:
Thermostat failure occurs from corrosion, stuck valve, degraded wax pellet, coolant contamination, or electrical faults in electronically controlled units.
Symptoms:
The engine overheats quickly because the thermostat is stuck closed, preventing coolant from reaching the radiator.
The engine runs too cool if the thermostat is stuck open, leading to poor fuel efficiency and increased emissions.
Temperature gauge readings fluctuate erratically, indicating inconsistent thermostat operation.
The cabin heater blows cold air even when the engine is warm, due to insufficient coolant retention in the block.
Coolant leaks may appear around the housing or overflow tank from pressure buildup caused by poor flow regulation.
Parts to Replace
Mahle Thermostat Part # 0 The MAHLE Engine Coolant Thermostat is an essential component designed specifically for a wide range of BMW vehicles.
OEM Thermostat Part # 079121111J The Genuine VW/Audi Engine Coolant Thermostat Kit, part number 079121111J, is a critical component for maintaining the optimal temperature of your Audi's engine.
P0089 and P0191 indicate fuel pressure regulation faults—often caused by failing sensors, clogged filters, or weak fuel pump performance.
Why it happens:
Fuel pressure regulator failure stems from diaphragm wear, spring fatigue, fuel contamination, seal degradation, electrical faults, or manufacturing defects over time.
Symptoms:
The engine may misfire or hesitate during acceleration due to inconsistent fuel pressure delivery.
Black smoke from the exhaust can appear, caused by an overly rich air-fuel mixture.
Fuel leaks may be visible near the regulator or vacuum line, indicating diaphragm rupture.
The check engine light often activates, with fault codes like P0089 or P0191 stored.
Poor fuel economy and reduced engine performance result from incorrect fuel pressure regulation.
Parts to Replace
Mann-Filter WK 720/4 Standard Fuel Filter ensures precise fuel delivery, OE fit, and leak resistance—ideal for Audi V8 platforms needing stable pressure.
P2111 and P2112 signal throttle actuator faults, stuck open or closed causing poor throttle response, limp mode, stalling, or no start.
Why it happens:
Throttle body failure stems from carbon buildup, worn sensors, poor maintenance, electrical faults, oil contamination, or degraded actuator mechanisms over time.
Symptoms:
The engine may idle roughly or surge due to disrupted airflow and poor air-fuel mixture control.
Acceleration becomes inconsistent or sluggish as the throttle plate fails to respond accurately to pedal input.
The check engine light illuminates, often triggered by throttle position sensor faults or actuator errors.
Fuel economy drops noticeably because the engine compensates for incorrect airflow with excess fuel delivery.
The engine may stall unexpectedly, especially during low-speed maneuvers or when coming to a stop.
Parts to Replace
OEM Throttle Body Part # 077133062A The Genuine VW/Audi Fuel Injection Throttle Body part number 077133062A is the ideal solution for Audi owners seeking a dependable replacement part.
Bosch Throttle Body Part # 0280750047 The Bosch Fuel Injection Throttle Body, part number 0280750047, is a premium-quality replacement designed specifically for a variety of Audi and Volkswagen models.
P0335 and P0336 indicate crankshaft sensor circuit faults—causing misfires, hard starts, poor timing, and erratic engine performance signals.
Why it happens:
Crankshaft position sensor failure occurs due to heat damage, vibration, wiring faults, or magnetic interference disrupting timing signal accuracy
Symptoms:
Poor Fuel Economy: The engine consumes more fuel due to incorrect air-fuel mixture readings.
Check Engine Light: A faulty sensor triggers diagnostic trouble codes and illuminates the warning light.
Rough Idling or Misfires: Inaccurate oxygen data causes unstable combustion, leading to engine hesitation or misfiring.
Failed Emissions Test: Excess pollutants from improper fuel burn result in high emissions output.
Sluggish Acceleration: The ECU struggles to optimize performance, causing delayed throttle response and reduced power.
Parts to Replace
Audi Crankshaft Position Sensor 077905381F This premium-grade sensor is designed to monitor the position and rotational speed of the crankshaft, providing essential information to the Engine Control Unit (ECU).
P0130–P0141, P0160 indicate oxygen sensor circuit faults, caused by wiring issues, sensor failure, or exhaust leaks disrupting fuel trim.
Why it happens:
Oxygen sensor failure occurs due to contamination, aging, or thermal shock - causing inaccurate readings that disrupt air-fuel ratio control.
Symptoms:
Engine Stalling: The engine may shut off unexpectedly due to loss of timing signal.
Hard Starting: Cranking takes longer or fails entirely because the ECU lacks crankshaft position data.
Misfiring: Incorrect timing causes cylinders to fire erratically, reducing performance and efficiency.
Poor Acceleration: Throttle response becomes sluggish as ignition timing and fuel delivery are compromised.
Check Engine Light: Fault codes like P0335 or P0336 are triggered, alerting to sensor circuit issues.
Parts to Replace
Front 1K0998262AA The Genuine VW/Audi Audi Oxygen Sensor is a critical component designed to enhance the performance and efficiency of your Audi vehicle.
Front- 17363 This premium-grade sensor, developed by Bosch, a trusted leader in automotive components, plays a crucial role in monitoring the exhaust concentration of oxygen, which is vital for maintaining the optimal air-to-fuel mixture in your engine.
Downstream, (Universal) (4-wire) - 15733 The Bosch Oxygen Sensor 15733 is a universal four-wire oxygen sensor designed to enhance the performance and efficiency of your vehicle's engine.
P0615 signals starter relay circuit fault; P0688 flags PCM power relay sense circuit open, causing no-start or stalling issues.
Why it happens:
Starter failure stems from worn brushes, solenoid faults, heat damage, poor grounding, oil contamination, or electrical overloads disrupting motor engagement.
Symptoms:
Clicking sound when turning the key often means the starter solenoid is engaging but the motor isn’t spinning.
No response at all when starting—no crank, no lights—can indicate a completely failed starter or electrical disconnect.
Intermittent starting issues, where the engine starts sometimes but not always, suggest worn internal contacts or heat-related failure.
Smoke or burning smell near the starter points to overheating or electrical short inside the starter housing.
Slow or labored cranking implies the starter motor is struggling to turn the engine, possibly due to internal wear or voltage drop.
Parts to Replace
OEM Starter Part # CST15118GS The CST15118GS OEM Starter Motor is a high-quality replacement part designed specifically for Audi vehicles. Engineered to meet or exceed the original equipment specifications, this starter motor is an ideal fit for part number 079911023D.
Valeo Audi Starter Motor (New)- 438161 The Valeo Audi Starter Motor is engineered to OEM standards, ensuring reliability and performance. When functioning correctly, the starter motor.
MPA Audi Starter Motor 17887 MPA. 17887 starter features 12V, 1.7kW output, Valeo design, CW rotation, fits Audi 4.2L V8 applications reliably.
OEM Audi Battery Cable 8S0915181B The genuine VW/Audi Battery Cable with part number 8S0915181B is a key component in maintaining your vehicle's electrical system.
Wheel bearing failure stems from poor lubrication, contamination, rough roads, misalignment, overload, water ingress, and improper installation or low-quality parts.
Symptoms:
Grinding noise increases with speed, often mistaken for tire or brake issues.
Steering feels loose or vague, especially during cornering or braking.
The vehicle pulls to one side while driving or stopping due to uneven wheel movement.
Vibration or shaking is felt from the affected wheel, not just through the steering wheel.
Uneven tire wear appears as patchy or scalloped tread, caused by misalignment from bearing play.
Parts to Replace
Front 4E0498625B Engineered to OEM standards, this wheel bearing ensures a perfect fit and reliable performance, making it an essential part of your vehicle's suspension system.
Rear (Quattro) 4F0598625A The Genuine VW/Audi Wheel Bearing part number 4F0598625A is a premium-quality replacement designed to provide a smooth and safe ride for your Audi.
Bison Performance Wheel Bearing - Front Part # BPWH02006 This premium-grade wheel bearing is designed for a precise fit and smooth operation, which is essential for maintaining the stability and efficiency of your vehicle's suspension system.
Timken Audi VW Wheel Bearing Assembly - Rear - BM500012. The Timken Wheel Bearing Assembly, part number BM500012, is an exceptional replacement component engineered specifically for Audi and Volkswagen vehicles.
Moog Hubs Wheel Bearing Assembly Part # 513353 The Moog Hubs Wheel Bearing Assembly is engineered to meet or exceed OEM standards, ensuring a reliable fit and performance for your vehicle.
Transmission fluid leaks occur from worn seals, cracked pan, loose drain plug, damaged cooler lines, or degraded gaskets under heat stress.
Symptoms:
Red or brown puddles appear under the vehicle, especially near the transmission pan area.
Burning smell may arise when leaking fluid contacts hot engine or exhaust components.
Delayed or slipping gear shifts occur due to low fluid pressure inside the transmission.
Transmission warning light illuminates on the dashboard, indicating fluid loss or internal pressure issues.
Unusual whining or humming noises come from the transmission, especially during acceleration or gear changes.
Parts to Replace
OEM Audi Auto Trans Oil Pan Gasket 125.370 The Elring Transmission Oil Pan Gasket (part number 125.370) is expertly crafted from high-quality materials to ensure a perfect fit on Audi and Volkswagen vehicles.
ZF Audi Transmission Pan Gasket- 0501322078 The ZF Transmission Oil Pan Gasket, part number 0501322078, is a crucial component designed for Audi vehicles utilizing the 09L 321 371 A transmission systems.
Elring Audi Automatic Transmission Gasket Set - 821460 The Elring Automatic Transmission Gasket Set is an essential component designed specifically for Audi vehicles, ensuring optimal performance and reliability for your transmission system.
CV axle failure stems from torn boots, grease loss, contamination, excessive wear, poor installation, water ingress, and aggressive driving stress.
Symptoms:
Clicking or popping sounds during sharp turns often indicate worn outer CV joints.
Grease splatter near the wheel or tire suggests a torn CV boot leaking lubricant.
Vibration while driving, especially under acceleration, points to internal joint wear or imbalance.
Knocking noises when reversing may signal a failing inner CV joint.
Bouncy or unstable ride quality can result from compromised axle damping and joint articulation.
Parts to Replace
Front Passenger Side AD8135 Designed specifically for Audi models, this premium-grade aftermarket part is engineered to meet or exceed original equipment specifications, ensuring a reliable and efficient ride.
Front Driver Side AD8136 The Surtrack AD-8136 CV Axle Shaft is expertly designed for select Audi vehicles, ensuring a perfect fit and reliable performance.
Front Inner 4E0498201 BKN0115 The Rein Audi VW CV Joint Boot Kit is designed to provide superior protection and longevity for your vehicle's CV joints.
Standard Engine Coolant Temperature Sensor Part # TS-608. Standard TS-608 sensor uses brass housing and polymer connector for accurate readings, fast response, and OE-fit durability across temperature extremes.
The C6-generation Audi A6 4.2L Quattro pairs a naturally aspirated 4.2-liter V8 engine with the confidence of Audi’s renowned all-wheel-drive system, offering a balance of refined luxury and muscular performance. Built for smooth highway cruising and executive-class comfort, the A6 4.2 also comes with its share of high-mileage concerns. From timing chain tensioner wear to intake runner faults and electronic module failures, common age-related issues can arise. That’s where eEuroparts.com comes in offering high-quality OEM and aftermarket parts to keep your Audi performing at its peak.
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
Whether you're chasing down a drivability issue, resolving suspension clunks, or doing proactive maintenance on your 4.2L V8 Audi, eEuroparts.com delivers the parts, reliability, and expertise you need to keep your A6 driving strong mile after mile.
Frequently Asked Questions
Why does my A6 4.2L misfire on startup? ⌄
Often rocker arm or hydraulic lifter wear. Codes (P0300–P0308) appear with ticking noise, rough idle, or loss of power.
Why is my coolant level dropping without visible leaks?⌄
Failed coolant temperature sensor or thermostat. Codes (P0116/P0128/P2181) plus overheating or erratic gauge behavior confirm the issue.
Why do I hear humming that changes with speed?⌄
Worn wheel bearings. ABS or traction lights may trigger, with vibration and humming increasing while cornering.
Do I need to service the transmission fluid regularly? ⌄
Yes. Dirty or low fluid leads to slipping, harsh shifts, overheating, or leaks. Fresh ZF fluid extends transmission life.
Why does my V8 stall or hesitate under load? ⌄
Failing high-pressure fuel pump or pressure regulator. Symptoms include long cranks, hesitation, poor fuel economy, and codes (P0087/P2293).
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