Brakes are not always firm. Could this be a Master Cylinder problem?

Asked by Guru2DKLZ Feb 21, 2020 at 09:49 AM about the 2007 Buick Rendezvous CX FWD

Question type: Maintenance & Repair

Brake pedal is firm when first pressed and them next time pedal goes completely to floor. The next time used the pedal is firm,. Pedal is firm when backing up.

157,625

James answered 4 years ago

Most likely the master cylinder is leaking internally. If the pedal fades to the floor under steady pressure, it's definitely the master cylinder. Hope that helps! Jim

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Brakes are not always firm. Could this be a Master Cylinder problem? 1 Answer

Brake pedal is firm when first pressed and them next time pedal goes completely to floor. The next time used the pedal is firm,. Pedal is firm when backing up.

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