Brake Fluid Leaks on 2017 Kia Optima
I bought a 2017 Kia Optima LX (2.4L) in April at the local used car dealer. Right off the bat, I suspected that the brake pedal was kinda soft / mushy. I didn't think much of it at the time though. In May, the parking brake light turns on and I brought it to a mechanic, who topped off the brake fluid. He said he looked under the car, and the brake lines look OK and couldn't find any leaks. This was about 1-month ago.
Just a few days ago, the same thing happens again. My parking brake light turns on again, and I checked the brake fluid level and it is low again. I looked around the master cylinder myself and it looks super clean. After some online research, I suspected that it might be either the master cylinder or the vacuum booster:
- Master Cylinder: I checked the brake pedal and after two pumps, the brake pedal stays at the same place with minimal pressure. Application of hard pressure was able to get the pedal to the floor. Constant pressure does not move the pedal to the floor though
- Vacuum Booster: I pumped the pedal with the engine turns off. Then turned-on the engine. Maintaining the same pressure, the brake pedal slides about 1-2 inch down upon turning the engine on.
Based on the above tests, the issues don't seem to be on the master cylinder or vacuum booster.
I'm thinking I might bleed the brake, but I'm not sure if that will do anything - especially if there is a leak... Any suggestions?