C4 , A6 , Audi Forum Topics
Common Issues with the 2.5L V6 Engine in the 1995 Audi A6
Discussing common problems and symptoms with the 2.5L V6 engine found in the 1995 Audi A6 model year.
1997 Audi A6 Quattro: What to Expect from a Used Purchase
Considering purchasing a used 1997 Audi A6 Quattro, want to know what to expect in terms of performance and reliability.
Audi A6 C4 Transmission Problems and How to Fix Them
I'm experiencing issues with my Audi A6 C4's automatic transmission, where it occasionally slips out of gear or fails to engage properly. Has anyone else en...
Best Upgrades for the 2.5L V6 in My 1994 Audi A6
I'm looking to upgrade my 2.5L V6 in my '94 Audi A6 for better performance and improved fuel efficiency I'd like to hear about upgrades such as intake and e...
How to Diagnose a Faulty Oxygen Sensor on a 1996 Audi A6
Do I Need to Replace the Timing Belt at 80K Miles on My '95 A6?
Considering replacement of timing belt at 80K miles on my '95 A6, is it truly necessary or just a precautionary measure?
Audi A6 C4 (B4 chassis) Maintenance Costs: What to Expect
Sharing my experience with maintenance costs on a C4 B4 chassis Audi A6 to help others prepare for expenses.
My 1997 Audi A6 Quattro Won't Start - Possible Causes and Fixes
What's the Best Way to Increase Horsepower in a Stock 2.5L V6?
Looking to squeeze out some extra power from my stock 2.5L V6, seeking advice on the most effective modification methods.
Audi A6 C4 (B4 chassis) Suspension Upgrades for Improved Handling
I'm looking to upgrade the suspension on my Audi A6 C4 (B4 chassis) and was wondering if anyone has experience with aftermarket upgrades. I've heard of thin...