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Q: no brake pedal

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I replaced the front rotors calipers and pads on the front,And bled them everyway known to working the farthest the the front to doing it with the engine running as well but still cannot get any brake pedal when its running

My car has 108000 miles.
My car has an automatic transmission.

A: Hello. If there is not any air left in the ...

Hello. If there is not any air left in the system then you may have a faulty brake master cylinder.

Many times a master cylinder will fail during a brake bleeding procedure as the piston in the master cylinder travels too far during the bleeding, which can damage the internal seal. It is also possible that air was drawn into the system if the brake fluid got too low. If this is the case, then you may have air trapped in the ABS unit. This can be difficult to bleed out without a pressure bleeder.

I typically isolate the master cylinder by blocking off its lines and then seeing if there is pressure. If not, then the brake master cylinder needs to be replaced.

If you need to have this looked at, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose your brake system issue.

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