Clean any dirt or grime off the master cylinder reservoir cap with the shop towels ... It's normal for brake fluid levels to ...

OK, maybe if you leave a puddle on a friend’s driveway instead — but still, a mystery leak is ... car where the brake lines run, or under the firewall where the master cylinder lives is ...

The brake master cylinder is the first component in a vehicle’s braking system, activated by depressing the brake pedal. The pedal pushes a piston through this cylinder, forcing brake fluid ...