C4 , A6 , Audi Forum Topics

Discussing common problems and symptoms with the 2.5L V6 engine found in the 1995 Audi A6 model year.

Considering purchasing a used 1997 Audi A6 Quattro, want to know what to expect in terms of performance and reliability.

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 encountered similar problems? If so, what was done to resolve the issue? I've tried cleaning the solenoids and replacing the fluid, but the problem persists

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 exhaust systems, camshaft swaps, engine computer tuning, and suspension modifications that would benefit this engine type any personal experiences or recommendations are greatly appreciated

Considering replacement of timing belt at 80K miles on my '95 A6, is it truly necessary or just a precautionary measure?

Sharing my experience with maintenance costs on a C4 B4 chassis Audi A6 to help others prepare for expenses.

Looking to squeeze out some extra power from my stock 2.5L V6, seeking advice on the most effective modification methods.

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 things like sway bars and coilovers, but would love some advice on what's worked best for others in terms of improving handling and stability.