Which parts fail
Components named in complaints (engine, cooling system, oil leaks, timing chain, exhaust).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2001 Audi A4 owners, lightly cleaned up (personal details are redacted by NHTSA).
2001 Audi A4 quattro 2.8l. As driving smoke was coming from hood.. Park and realize the engine was on fire. It look like it started by the passenger side headlight and spread. I read that Audi had a recall on head light switch but did not rec, a recall letter. Not exactly sure where the fire started my Audi caught on fire. I dont't have pictures to upload but I will soon. I am very hurt to know that the car I enjoyed driving caught on fire/disappointed with Audi
The "check engine" light on my 2001 Audi A4 quattro came on and was running somewhat roughly. I called the dealerships service department and they told me to bring it in. On the 8-mile freeway drive the engine caught fire and destroyed the engine.
2001 Audi A4 1.8 turbo: the timing belt broke while the car was traveling in heavy, rush hour traffic causing the car to be immediately disabled and stopped with no opportunity to move the car off of the highway. The 3-lane highway was backed up for 6 miles while police and emergency workers worked to tow the car. The disabled car LED to a very dangerous situation with traffic backed up for over 1-hour on a 3-lane highway with a 55 MPH speed limit and could have easily caused additional accidents. The timing belt failure caused extensive, additional damage to the engine that is estimated to cost about $5,000-$6,000 to repair. My Audi A4 has the same 1.8 t engine and item (timing belt) as in the 2001 vw 1.8 t and that item has been recalled. The timing belt defect in the 2001 A4 appears to be quite well known to the two Audi dealers that I frequent. …
Malfuntion indicator had been on before I deployed to iraq and was still on when I came back. I brought it to the dealor for the $50,000 mile scheduled maint. Less than 2 months later, I started the car at a store and heard a loud pop, the engine started idling hard and was very noisy. I was able to drive in first gear the two blocks to my house but the car was very shaky. The spark plug had shot out, there was oil and grime all over it and the threads of the cylinder were stripped. My friend in the car, who has worked on porshes before, said I was lucky this happened when it did because if I was driving on the highway at a high speed, I probably would have been seriously hurt in an accident. …
2001 Audi A4 1.8 turbo at 99.1K miles. The timing belt prematurely napped while the car was traveling in a busy morning commute causing car to disabled on the freeway. The timing belt failure caused extensive, additional damage to the engine that estimated to coast about $6000 to repair. I have all my maintenances done at the Audi dealers and follow all the recommend service by Audi. I was never been recommended to replace the timing belt on my all previous visits for maintenance service. The recommended timing belts replacement by Audi for my model is 105K miles. Both Audi dealer and Audi denied been in responsible for the timing belt defect and/or incorrect timing belt maintenance recommendation which subsequently result the engine damage and provide any assistant. According to Audi, they do not guarantee the timing belt will last to 105K miles, only that it is their recommendation.
Purchased an 2001 audio (used) at d & s auto and within a week there was screeching noise coming from the engine, engine light came on. Brought it back to d & s auto. D & s auto had it looked at and they said the list of problems were none found, only that they fixed the engine light. Couple days later the engine light came back on and also the rear back tire was making a strange noise. D & s auto made an appointment for the 2001 auto to go to another dealer to be looked at. Also, purchased the best full warranty on the vehicle. The dealer printed out a list of problems which are listed above he said that are problems and the cost was going to be around $3,000.00 and that the warranty does not cover any of the repairs.
Oil light came on. Immediately pulled over and checked engine oil level. Not low. Took the car to the dealership. Originally diagnosed as needing a new oil pump due to oil sludge. On further inspection the dealer found scarring on the engine bearings and wear on the camshaft. Upon flushing all the pre-existing oil out of the engine, metal filings were found. New diagnosis: completely new engine required. Audi, USA knows this is a prombem with A4 1.8t. They've extended warranties as a direct result. Yet becuase I'm the second owner and can't produce all previous oil change receipts, I'm being required to pay for the new engine. This is a poor engine design that I shouldn't be held liable for.
'01 A4 2.8: (1) digital display is blurry and cannot fully understand everything the computer is displaying, (2) internal oil seals have become defective causing a foul burnt-oil smell within and outside the vehicle, (3) transmission downshifts very hard and rough, (4) very poor design by the engineers to place a cupholder directly over the stereo and heater instrumentation which have caused my buttons to stick. Have taken the vehicle to various dealerships and shops and technicians have stated that the seals are obviously a design flaw and so is the display panel with has some software or lcd problems associated with it.
The check engine light (MIL) has had several recurrences. The mass air flow meter and sensor have been replaced twice. ( 65,060 and 107,894). The initial failure was at 36,512 miles. 47,819 miles, 65,060 miles, 107,894 miles,118,628 miles and in July, 2014 at 159,421 miles, there was a warranty extension letter in November, 2003 that included 2001 Audi a-4 1.8t vehicles and a voluntary emissions service action 28f2/j1 ignition coil inspection/replacement in October, 2009. Secondary issue. Unable to read dashboard display. Pixeled. Unable to read safety/vehicle notifications.
I leased an A4 2001 Audi in December 2000. My lease runs out in March 2004 and I'm looking at what my rights are as a consumer. Over the last 6 months, I've had my car towed and repaired twice for ignition coil failure as well as my tires replaced from out of whack alignment. Today, the engine light appeared again and I will drop it off at the Audi service department, this Monday for maintenance review. Fortunately, the only costs I've incurred are replacement of the 2 front tires. It currently has 33,000 miles on it.
Engine complaints in other A4 years
Frequently asked questions
How common are engine problems on the 2001 Audi A4?
NHTSA has 33 complaints about the engine & cooling of the 2001 Audi A4, 25% of the model year's 131 complaints. The component named most often is engine (14 mentions).
Is there a recall for 2001 Audi A4 engine problems?
No. NHTSA lists no engine & cooling recall for the 2001 Audi A4, though it has 1 recall for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2001 Audi A4 engine problems start?
Half of the complaints with a recorded mileage happened before about 65,000 miles, and 5% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 4 fires and 0 injuries to engine & cooling problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.