Spongy Q2 Brake Fix: Air vs Low Fluid Diagnosis

A spongy brake pedal often indicates air in the hydraulic brake system or deteriorating brake fluid. I experienced similar symptoms with my 2018 Audi Q3, which required immediate attention. The master cylinder needed inspection when my brake pedal started feeling soft. After a complete brake inspection, the issue was traced to contaminated brake fluid and air bubbles in the brake lines. The solution involved a full brake fluid flush, bleeding the brake system, and replacing the degraded rubber brake hoses that had allowed moisture contamination. This is a serious safety concern that requires professional diagnosis. A basic brake inspection might identify the issue, but be prepared for a thorough hydraulic brake system evaluation. The symptoms you describe match classic signs of compromised brake fluid integrity or potential brake line issues. Given your Q2s mileage, its also worth checking the brake pads and rotors during inspection. Delaying repairs could lead to complete brake system failure, so addressing this promptly is crucial. Consider requesting a full brake system diagnostic that includes pressure testing of the master cylinder and inspection of all brake components.

I had nearly identical brake pedal symptoms on my Audi Q2 last year. The brake fluid was indeed low and contaminated, requiring a complete fluid replacement and system bleeding. Did you get it checked out yet? My brake system inspection revealed worn brake lines that needed replacement too. A soft brake pedal is definitely not something to ignore, mine got worse pretty quickly once it started. Would be helpful to know what the repair ended up costing in your case and if youve had any other brake system issues since getting it fixed?

Just had it checked out last week. The mechanic confirmed the brake fluid was low and contaminated, similar to your experience. The brake system inspection showed worn brake pads and rotors that needed replacement. The total repair cost came to 480 Euro, which included a complete brake fluid flush, bleeding the brake lines, and replacing the worn components. Since fixing the hydraulic brake system and getting fresh brake fluid, the brake pedal feels firm again with normal pressure response. No more spongy feeling when pressing the pedal. The car brakes smoothly now and I havent experienced any other brake-related issues in the past week. The mechanic also inspected the brake lines thoroughly and they were still in good condition, so I got lucky there compared to your situation. Regular brake system maintenance should help prevent similar problems from developing again.

I took my car to a new mechanic yesterday after reading these responses. The warning light was still off, but I didnt want to risk driving with questionable brakes. Good call, turns out my brake fluid was severely contaminated and needed immediate replacement. The brake inspection revealed both front brake pads were worn down and needed replacement. Total repair cost was 390 Euro including parts and labor. The mechanic did a thorough job checking the entire brake system and found the brake lines were still in good shape. After the fluid replacement and new pads, the pedal feels solid again. No more sponginess when braking. Really glad I got it checked out before it became a bigger issue. Thanks for sharing your similar experiences, it helped convince me not to delay getting it looked at.