Volkswagen Group of America, Inc. (Audi) is recalling certain 2022 Audi A6 Sedan, A4 Sedan, Q5, and Q5 Sportback vehicles. The semiconductor inside the engine control unit may short-circuit and cause an engine stall.
Engine & cooling
Audi A4 Engine problems by year
504 complaints filed with NHTSA about the Audi A4's engine & cooling. Stalling, loss of power, oil consumption, overheating, head gaskets, timing chains and engine failure.
Engine complaints by model year
Engine recalls
The Gates Corporation (Gates) is recalling certain aftermarket Tru-Flow Water Pumps, part number TFW 41127, sold at certain NAPA Auto Parts and/or installed by automotive service technicians after November 1, 2013 (and manufactured August 2013 through October...
Vehicle description: passenger vehicles. If the engine backfires during a cold-start, an air screen which is loosely seated in the air flow meter can become damaged.
Latest A4 engine complaints
my initial water pump from Audi was replaced via recall. then I recently changed the thermostat hose and my water pump started leaking again. can you please look into these faulty water pumps?
I am reporting severe vehicle safety defects and merchant safety non-compliance regarding a 2014 Audi A4. The vehicle was financed with severe, undisclosed engine defects, specifically extreme oil consumption and catastrophic coolant leaks. When I requested warranty repairs, a dealership representative named Stephen explicitly instructed me in writing via text message to intentionally operate the vehicle with active oil and coolant failures until the engine suffered a total mechanical blowout. Relying on this...
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directive, I operated the vehicle, resulting in a sudden engine seizure inside a high-traffic 4-way light intersection placing my safety in immediate jeopardy. Additionally, the dealership lied stating the service brakes were brand new, but they were dangerously worn down and squeaking upon delivery, failing basic intake safety standards. I possess full text transcripts verifying these inspection lies and bad-faith directives.
Oil consumption is extremely high this vehicle burns way to much oil in short amount of time. Oil has to be added every 300 to 400 miles and there are no leaks present
The engine oil level has been gradually dropping and has required monitoring and/or adding oil between normal service intervals. The exact source is unknown. It may involve abnormal oil consumption, an external oil leak, internal engine oil consumption, PCV/oil separator issue, turbo-related oil consumption, gasket/seal issue, or oil loss that is not leaving an obvious visible puddle. This is being reported as a safety concern because low engine oil or abnormal oil loss can lead to low oil pressure, warning...
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messages, engine overheating or damage, smoke, oil contacting hot engine/exhaust components, limp mode, stalling, or loss of propulsion while driving. The issue should be inspected rather than treated as normal maintenance unless a proper diagnosis confirms normal operation. No crash, fire, injury, or fatality occurred. The vehicle/component is available for inspection, and oil-level/refill records, repair records, photos, receipts, and service communications are available if requested.
The vehicle displayed a low coolant warning and the coolant reservoir was low. Audi dealer service records dated on or about 02/14/2025 document the concern as: "client states low coolant warning was on, coolant reservoir is low, diagnose and advise." The dealer performed coolant-related work involving the thermostat gasket / coolant hoses or connections to the coolant reservoir, ran the vehicle to operating temperature, and rechecked. The concern is being reported because the coolant loss/refill issue continued or...
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remained unresolved afterward. The exact source of coolant loss is unknown, but it may involve the water pump, thermostat, coolant reservoir, coolant hoses/pipes, pressure loss, internal coolant leak, or coolant loss that evaporates before leaving visible residue. This is a safety concern because coolant loss can lead to overheating, warning messages, limp mode, loss of propulsion, engine damage, steam/smoke, or stall risk while driving. No crash, fire, injury, or fatality occurred. The vehicle/component is available for inspection, and Audi service records, coolant-system communications, photos, and water-pump/coolant-related documents are available.
The contact owned a 2018 Audi A4. The contact stated that while driving at an undisclosed speed, there was fluid leaking from the front of the vehicle. No warning lights were illuminated. The contact also stated that while the vehicle was parked, there was a puddle of fluid leaking from the front of the vehicle. The vehicle was taken to an independent mechanic, where it was diagnosed and it was determined that the water pump had failed and needed to be replaced. The vehicle was not repaired. The dealer was contacted. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 92,000.
The contact owns a 2015 Audi A4. The contact stated that when the vehicle was started, the coolant warning light illuminated. The vehicle was turned off and restarted after 20 minutes, and the coolant warning light was no longer illuminated. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was 141,177.
The timing chain and tensioner in my 2014 Audi A4 Quattro (VIN: [[redacted]] ) failed without warning, causing the engine to suddenly stall and become inoperable while in motion. This presented a serious safety hazard. Although my vehicle is slightly outside the settlement mileage and time limit, timing chains are considered a lifetime component and are not a maintenance item, meaning they are not expected to fail and are not listed as requiring inspection or replacement under any Audi maintenance schedule. This...
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failure was sudden, catastrophic, and safety-related. Audi and Volkswagen have already acknowledged this timing chain defect in federal class-action litigation (Opheim et al. v. Volkswagen Group of America), and my VIN is included in the affected vehicle list. Audi's own dealership technician confirmed that the timing chain is stretched, the tensioner is fully extended, and the intake camshaft timing is off by a tooth - clearly matching the known defect. The vehicle stalled suddenly while arriving at a repair facility, and it would not restart. Had this occurred on a highway, a collision could have easily resulted. This is a known safety defect, affecting engine timing, power loss, and stall risk. The manufacturer denies responsibility despite known defects, safety implications, and VIN eligibility. I am requesting NHTSA to investigate Audi's refusal to address a known and documented safety-related defect involving a critical non-maintenance engine component that is expected to last the life of the vehicle. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
The contact owned a 2013 Audi A4 Allroad. The contact stated that while parked and occupied in the vehicle, after starting the vehicle, her friend heard a puff noise coming from under the vehicle. No warning light illuminated however, after starting the vehicle, the electronic power control illuminated. In addition, the contact's friend lifted the hood of the vehicle, and he noticed smoke and flames coming from the engine. No injuries were sustained. No medical attention was required. The fire was extinguished by...
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the contact and her friend. A fire department arrived at the scene however the fire was already extinguished upon their arrival. The fire report was unknown. A police report was not filed. The vehicle was towed to Accu-Tech Auto Body. The vehicle engine was destroyed. The vehicle was deemed a total loss by her insurance company. The manufacturer was not made aware of the failure. The approximate failure mileage was unknown.
The vehicle at 13,[redacted] miles on the high ways, and during stop & go traffic; vehicle begins to tremble, transmission and floor shakes, rpms are higher than normal, abnormal noises coming from engine (screeching), jerking on acceleration on the first gears, rough idle, happens only on highways after 1hr of driving. Can drive over 40 min without any check engine light turning on. No codes come up, while clearly having issues. After a day of being off, car goes back to normal without those issues, just...
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vibrations and pulsing on idle. -happens on Texas highways where vehicle begins to have trouble with acceleration and transmission shakes yet no check engine or error messages appear. -problem has been shown to one Audi dealer while happening and another Audi dealer was able to reproduce the problem. They even noted how vehicle will do all the issues noted above while not providing any error codes or messages. - vehicle has been inspected but all they do is reset software and hand back keys. While issues are still prevalent. - no warning, no over heat or any codes appear on the vehicle. Issues started at 13,[redacted] miles. Only on long highway or stop and go traffic does it happens
Spark plug for damaged due to oil seeping into it. This could lead to overheating of engine or cylinders getting damaged potentially leading to vehicle malfunction when I drive. Audi inspected the part and recommended to reseal the top of the engine. There was a warning for check engine which led to identifying the problem
The vehicle has an oil consumption issue whereby I top off the oil in about every 400 miles. The dealership indicated that this is a known problem with Audi. The issue first started with warnings that engine is overheating and with further warnings that oil level is low
Hi My name is [[redacted]] and I have an 2014 Audi A4 that has been consuming to much oil ever since I bought it . I see the vehicles contained defective pistons that caused excessive oil consumption. Can you please help with this ? INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
The car is completely defective,total engine, gasket,water pump,intake manifold,airbag, transmission,torque,drive shaft, universal joints,all rear axles,wheel bearing,bought at auction Aug 19,2024, $4000, the as is was so small and on the back of a sheet we did not see it,we are senior,
No 3 cylinder piston ring failure .Loss of compression.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked daily. Complaints are owners' own reports and are not verified. How we use the data