Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.


really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
1 / 0
Average Mileage:
55,316 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2001 Audi A6 engine problems

engine problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2001 Audi A6:

Unsubscribe any time. We don't sell/share your email.

2001 Audi A6 Owner Comments

problem #4

Jan 182009


  • 78,000 miles


Huge oil leak on my 2001 Audi A6 4.2 caused by the PCV valve freezing closed. This has happened to my car 3 times in the last 2 years. This only happens during extreme cold weather, colder that -10 deg F. no indication of the freeze problem until the car slows to below highway speeds and you can smell the oil burning. The PCV valve freezes closed which allows pressure to build in the crankcase of the engine causing overpressure and oil to be forced out of the valve cover gaskets, ignition coil seals, cam seals and crank seals. So much oil leaks out that it covered the entire engine compartment, the front suspension including the front brakes, down the sides of the car, covers the entire underside of the car including the entire exhaust system. Very serious fire danger and possibility of not being able to stop the vehicle because of oil on the brakes. My car did not start on fire and I was able to stop the vehicle. I have contacted Audi of America and my local Audi dealership and the dealership acknowledged the freezing problem and recommended the installation of a redesigned PCV valve. My car is already equipped with the redesigned valve, so no repair was applied. Audi blames this problem on driving habits of the owner allowing the car to idle in extreme cold. I have pictures of my PCV valve with ice inside of it and have contact info on other people that have seen the same problem, one resulting in a fire. The dealership location is fargo, North Dakota name is valley imports, talked to the service manager.

- Mandan, ND, USA

problem #3

May 212007

A6 6-cyl

  • 89,000 miles
Hi Audi 2001 A6 atq 2.8L quattro. Can you investigate the material used on the coolant and windshield wiper reservoirs as I had them crack twice. Also, I brought my car in asked that all recall work be done, I want to be assured that the sensor warranty work was done on the engine coolant temp sensor, oil leaks in upper engine, 3 way catalyst dtc codes sensor as I am getting a check engine light and have already spent over $900 to repair this. Can I get the vacuum hose and tire information as well. I am concerned there are maintenance items which are on your list that my dealer has not performed that I have requested.

- Germantown, MD, USA

problem #2

Nov 232004

A6 6-cyl

  • Automatic transmission
  • 54,262 miles
The consumer was going about 50 mph when she was involved in an accident. Vehicle a pulled in front of vehicle B and stopped short, forcing vehicle B to rear end vehicle a. in the process, the air bags failed to deploy. Owner contacted the manufacturer and was told that the vehicle was not hit at the right angle to activate the air bags. The emergency lights flashed intermittently and the next day the vehicle would not start, the power unit beneath the floor board was soaking wet and had shorted out, the console under the gear shift was so hot that it could not be touched, there was an oil leak.

- Whitehouse Station, NJ, USA

problem #1

Nov 202003

A6 6-cyl

  • Automatic transmission
  • miles
2001 Audi A6 with all routine maintenance had check engine light on and was told it was nothing to worry about. A few weeks later the engine basically melted with out any warning. Dealer says the radiator was fine and the was no oil leak. All wires are melted onto the engine and the engine is ruined. Suspect electrical problem. Only 2 years old but off warranty. Dealer offers nothing and Audi offers 4000 towards a new Audi purchase. A net 37000 dollar loss in 2 yrs for me. I was told when I purchased the car, it would easily get 90000 to 15000 miles by every dealer. They are covering up an electrical defect or severly misrepresenting their product.

- Commerce, MI, USA

Not what you are looking for?