Soft, Spongy Brake Pedal Needs Urgent Audi A6 Service

Had the same issue with my 2015 Audi A4 2.0T. The spongy brake pedal was caused by air in the hydraulic brakes system, which developed after poor brake fluid replacement service. A proper brake inspection revealed three issues: Air bubbles in brake lines, Degraded brake fluid, Partially worn brake pads The fix required: 1. Complete system bleeding to remove air 2. Fresh brake fluid 3. New brake pads This is a serious safety concern that needs immediate attention. A spongy brake pedal indicates compromised braking efficiency. The fact your brake warning light hasnt activated yet doesnt mean everything is fine, the fluid might still be above minimum level while air is trapped in the system. The symptoms match classic signs of improper brake service. Suggest finding a certified brake specialist. Look for one who will first perform a proper brake inspection before starting any work. This isnt a repair to postpone or try saving money on, as brake failure risks are significant.

Thanks for sharing that detailed solution. It lines up perfectly with my suspicions. After getting my master cylinder and brake lines checked, I had almost identical issues fixed on my A6 a few months back. Air bubbles in the brake system really messed with the brake pedal feel. Could you tell me how much the repair ended up costing you? Also curious if youve had any brake-related problems since getting it fixed.

Since getting my A4 fixed by a proper brake specialist, the brake pedal has been consistently firm with zero issues. The entire repair, including the brake fluid flush and system bleeding, came to 480 Euro for the worn brakes and air removal from the brake lines. The master cylinder turned out to be fine in my case, but the mechanic did a thorough inspection of the entire brake system to be certain. The brake fluid level low warning disappeared right after the service, and the braking performance has been perfect ever since. Its been about 8 months now without any brake-related problems. The brake pedal maintains good pressure and the warning light has stayed off. Getting it done properly the first time by a qualified shop was definitely worth the investment.

Thanks everyone for the help. Just got back from a certified brake specialist who fixed my A6. The diagnosis matched exactly what was discussed, air in the hydraulic brakes from that previous poor service job. The repair bill came to 520 Euro total, which included a complete brake system flush, bleeding the brake lines, and replacing some worn brake pads they discovered during inspection. The master cylinder checked out fine thankfully. The brake pedal feel is now rock solid, no more sponginess. The brakes respond consistently and the stopping power is noticeably better. Definitely learned my lesson about using qualified shops for brake work. Worth every cent to have it done right and feel safe on the road again.