Master brake cylinder faulty? Just a little bit? Reading the built-up pressure over 5 minutes gives you yay or nay.
Ah, smart guy: Dismantled the wheel without first loosening the bombproof shaft nut. A wrench helps.
No compressor to press the piston out of the brake calliper?
A grease gun and DIY adapter are an alternative.
In order to bleed the brake system of your beloved car, all you need in addition to the right brake fluid is an open ear and a healthy foot.
If the ABS indicator light is on, a defective speed sensor may be the cause. This is easy to test.
If the brake pulls on one side or a rim gets hot for no reason, the brake caliper may be to blame. How to repair it?
Almost all brake systems can be bled without an assistant or special tools: with a bicycle hose and pump.
