hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
96,250 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.

2005 Audi A6 engine problems

engine problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2005 Audi A6:

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

2005 Audi A6 Owner Comments

problem #4

May 102016


  • miles


Timing chain broke while driving home parked car immediately.

- North Chicago, IL, USA

problem #3

Oct 152015


  • 192,000 miles
Very common problem - "ignition module defective" code at 190,000 miles. Temporary repair of the issue with dtc reset. Full logging of car data via obd-II port reveals zero faults while car is running, and diagnostic traffic on the can bus at startup show zero faults. Once key is inserted in dash and turned to "accessory", module faults out without any traffic sent/received. Happens intermittently and dealership states this is a known problem. Dealership-only repair, per multiple Audi service technicians, Audi of America refuses to comply with Massachusetts right to repair law by making available to independent repair shops, the necessary tools and equipment to access the immobilizer hardware. Dealer estimates/quotes range from $2100-$3700 to replace entire steering column with the attached and separable ignition module (accessible via 2 screws and 1 rivet). Dealerships refuse to replace/re-code only the ignition module, stating the entire steering column needs replaced. Multiple reports of the same issue with other C6 body Audi A6 owners confirm the same details. Nothing is physically wrong with the ignition switch or module, and clearing diagnostic trouble codes allow the vehicle to start immediately. Suspect planned obsolescence of the part in question.

- Sterling, VA, USA

problem #2

Aug 292015


  • 68,000 miles
Engineering flaw lead to extraordinary expense replacing the entire steering column instead of just the module that failed. Doing some reviews on-line - seems to be a well known and common problem but Audi does not want to do anything about it - www.audiworld.com/forums/A6-S6-C6-platform-discussion-58/transponder-steering-column-2834070/ millage listed as approx since car is in the shop now.

- Highland Park, IL, USA

problem #1

May 292014

A6 8-cyl

  • 125,000 miles
Car stuttering. Depresses throttle to attempt to alleviate problem. Gas pedal stuck at full acceleration and maximum RPM. Set car into neutral and coasted to decelerate. After numerous attempts to disengage accelerator pedal, it finally sprung back from full throttle.

- Etna, NH, USA

Not what you are looking for?