What is brake master cylinder replacement?
A failing master cylinder is replaced to restore a firm, reliable brake pedal.
The master cylinder turns pedal pressure into hydraulic pressure for all brakes. Internal seal wear lets the pedal sink slowly when held.
Signs you need it
- Brake pedal slowly sinks to the floor
- Fluid leak at the back of the engine bay
- Brake warning light
- Inconsistent pedal
How it works
- Confirm the fault
- Replace the master cylinder
- Bench bleed and bleed the system
- Test thoroughly
You can choose a workshop visit or have a professional come to your home, work or depot.
How much does it cost?
The exact price depends on your vehicle and the job. On MYLES, each professional shows a fixed price, a starting price, a range, or sends a quote — so you can compare like for like before you book.
- Part price
- ABS bleeding procedure
- Access
Tips
- Do not drive with a sinking pedal
- Flush the fluid at the same time
Why it matters
Essential: a failing master cylinder is a serious safety risk.