Spongy Brake Pedal Signals Rotor or Fluid Issues

This sounds exactly like the issue I encountered on my 2005 Subaru Impreza. The spongy brake pedal combined with pulsation typically indicates air in the hydraulic brake system or deteriorating brake fluid. The symptoms worsened gradually over two weeks before I had it checked. The diagnosis revealed both contaminated brake fluid and partially worn brake pads. The brake fluid had absorbed moisture over time, causing decreased performance in the hydraulic brakes. This required a complete brake fluid flush, bleeding the brake system to remove air bubbles, and replacement of brake pads. While not immediately dangerous, delaying repairs could lead to brake fade or longer stopping distances. The mechanic also inspected the brake rotors, which showed minor scoring but were still within acceptable limits. Spongy brakes should never be ignored as they are crucial for safety. Having regular brake fluid changes every 2-3 years helps prevent this issue. For a 2008 Lucra with similar mileage, these symptoms align with typical brake system maintenance intervals. Get it checked soon, waiting too long could lead to more extensive repairs.

Thanks for sharing that experience. You described almost the exact same symptoms I had. After the brake fluid flush and new brake pads, did the spongy pedal feel completely resolve? Curious since my brake calipers are also making a slight squeaky noise now when coming to a stop. Just want to make sure I address all potential issues at once to avoid multiple trips to the shop. Would you mind sharing what the total repair cost was for your brake service? Trying to budget accordingly since these brake system repairs can get expensive.

After getting my Impreza serviced, the spongy brake pedal issue completely disappeared. The squeaky brakes you mentioned are a separate concern though, mine developed a similar noise from metal brakes grinding, which needed attention. Good news is the brake fluid flush and new brake pads totally fixed the original problem. The shop also found an undervoltage issue during diagnostics which was causing some electronic brake system irregularities. The total came to 240€ for the electrical fix. The hydraulic brake system now works perfectly, no more sponginess or pulsing. Getting everything addressed in one visit definitely saved time and prevented more wear on other brake components. If your squeaky brakes persist after service, have them check the brake shoes and calipers specifically, as these can cause those noises when wearing unevenly. Best to handle all brake-related repairs at once, as you mentioned. That way the entire system gets inspected and you avoid multiple diagnostic fees. A properly working brake system is worth the investment for safety and peace of mind.

I took your advice and had everything checked out last week. The mechanic confirmed it was mostly due to old brake fluid and some air in the brake system. They did a complete fluid flush, bled the lines, and replaced the front brake pads while they were at it. Total cost came to 320€ for parts and labor, a bit more than expected but worth it since they found and fixed a loose brake caliper bolt that was causing the squeaky noise. The entire service took about 3 hours. The brake pedal now feels firm and responsive again, just like when the car was newer. No more pulsating or sponginess. The squeaking noise is completely gone too. Definitely glad I had it all done at once rather than making multiple trips. Thanks for helping me avoid getting overcharged. The repair cost was right in line with what you mentioned, and now I know to check the brake fluid levels more regularly to prevent this from happening again.