Spongy Brake Pedal + Low Fluid in VW Passat Hybrid

Had the same brake pedal symptoms on my 2018 VW Arteon Hybrid. The spongy brake pedal and increased travel are typical warning signs of hydraulic brakes issues that need immediate attention. During my garage visit, the inspection revealed both low brake fluid and air in the brake lines. The root cause was worn brake pads that allowed more fluid displacement, making the pedal feel softer. The warning light came on shortly after the pedal started feeling different. The fix required a complete brake fluid replacement, bleeding the hydraulic system to remove air, and installing new brake pads. This was a serious safety issue that needed prompt attention since compromised brakes can lead to longer stopping distances. A simple fluid top-up would only mask the underlying problem. When brake fluid levels drop significantly, its usually because the fluid is either leaking or the brake pads are worn enough to require more fluid displacement in the system. With 92k on your car brakes, a thorough inspection of the entire brake system would be advisable. The hybrid system adds complexity to brake servicing, so using a shop familiar with VW hybrid models is important.

Thanks for sharing your experience. Your case sounds exactly like what I am dealing with. Last week the warning light also started flickering occasionally. I will definitely get it checked properly rather than just topping up the brake fluid. Do you remember roughly how much you paid for the complete fix? Also curious if you had any other brake-related issues since the repair was done?

After getting the brake system fixed, everything has been working perfectly for the past 8 months. No more warning lights or spongy pedal feel. The total repair cost was 480€, which included the brake fluid replacement, system bleeding, and new brake pads. The mechanic confirmed my brake fluid level low warning was caused by worn brake pads, just as suspected. The comprehensive brake inspection revealed no other issues with the hydraulic brakes or brake lines, which was a relief. Since the repair, the brake pedal response has been firm and consistent. Regular brake system maintenance is critical for hybrids, given how the regenerative and conventional braking systems work together. If you are experiencing similar symptoms, getting it checked soon would be a smart move to avoid any safety concerns.

I took your advice and visited my local VW specialist yesterday. The diagnosis matched exactly what you described, worn brake pads and air in the brake lines causing the master cylinder issues. Total bill came to 520€ for new pads, brake fluid flush, and system bleeding. The mechanic showed me how badly worn the old brake pads were, explaining why the brake pedal had that spongy feel. After the repair, the difference in pedal response is like night and day. No more warning lights either. Really glad I asked here first instead of just topping up the fluid. Having proper hydraulic brakes function is crucial, especially with these hybrid systems. The shop also gave the rest of the brake system a thorough check, everything else looked good. Will definitely keep a closer eye on brake maintenance going forward. Thanks again for the helpful input that pointed me in the right direction.