Q: Brake pedal goes all the way to the floor

asked by on January 21, 2016

After I had the rear wheel cylinder replaced on the left rear wheel, the brake pedal still goes all the way to the floor

A sinking pedal is often a sign that there is a leak somewhere in the brake’s hydraulic system. Sometimes a problem of this nature may render a vehicle unsafe to drive, as braking systems relies on sealed pressure to operate. I would thoroughly inspect all 4 wheels, and underneath the vehicle for any obvious signs of leakage. If no obvious visual evidence is found, I would then suspect a problem with the master cylinder. Master cylinders usually fail due to internal sealing issues, so a thorough diagnosis of your braking issue by a mechanic would be recommended.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

My truck cranks but it won't start - 1994 Chevrolet C2500

Hi. A couple of things to check: When the engine is at top dead center, does the rotor under the distributor cap point to the number 1 cylinder? It is very important that the engine is at top dead center...

I had the oil changed three weeks ago but the "change engine oil soon" light just came on. It is only on for a few minutes and t

Hi there. Typically a warning light like this will illuminate based on mileage set by the ECU. If the service was completed prior to the warning light being triggered, it's possible that the person doing the change forgot to clear...

Brakes out hitting hole

Hi there, thanks for writing in about your 2000 Ford E-250. Some master cylinders will let in just a little bit of air when the fluid is splashed around too much in the reservoir, which is likely what has happened to yours....

Related articles

How to Install New Rotors
A A brake rotor is one of the key components to helping bring your car to a stop. The brake pads squeeze together against the rotor, which spins with the wheel, to apply friction and stop the rotation of the...
How Long Do Brake Pads Last?
How How long can brake pads last? Brake pads last from 25,000 miles to 70,000 miles depending on their design and material. Brake pads are part of the braking system of every vehicle. Designed to handle high friction, when the...
Symptoms of a Bad or Failing Parking Brake Drum
If your car's parking brakes don't hold or just work poorly overall, you may need to replace the parking brake drum.