Q: Master cylinder going bad

asked by on February 09, 2016

I think my master cylinder is going bad. How can I tell?

The master cylinder may be going bad if you notice the pedal going down to the floor with no signs of any brake fluid leakage, or if the master cylinder is leaking fluid from the back of it into the brake booster. These are the two most common problems encountered with a master cylinder that would require replacement. I recommend you have a mechanic, such as one from YourMechanic, check your vehicle out for you and replace the master cylinder, if needed.

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

I have an aftermarket intake and it's reading 4.9 psi. Is that good or bad?

Hi there. An intake manifold should read 19 to 22 hg. This is 19 vacuum to 22 vacuum. If you are getting a psi reading, then there is either a turbo on your vehicle or the engine timing is out...

2005 honda civic pops out of 5th gear

You should have the transmission fluid drained and checked for metal particles in the fluid? The synchronizers inside the transmission can make it hard to get in to gear is they are worn and the 5th gear coming out is...

How do I alter the cruise control speed?

You can adjust the cruise control speed while the system is in use. To increase the speed, press the RES/+ button. Pressing this button will increase the speed by 1mph. Pressing and holding the button will increase the speed consistently...

Related articles

The Best Used Cars to Buy for Long Commutes
Most Most of us are faced with the prospect of commuting back and forth to work on a daily basis, but some have a much longer drive than others. When it comes time to buy a car, you need to...
The Top 5 Selling Cars in California in 2012
California California natives are notably environmentally conscious, and this often shows in their choices of vehicles as well. While trucks rarely make it to the top spots, hybrid vehicles are frequently on the list. Though previous years have seen the...
Top 10 PZEV Cars for Eco-Friendly Drivers
Teddy Leung / Shutterstock.com The whole idea of a PZEV (that is, a partial zero-emissions vehicle), seems paradoxical. You’d think it’d have to either be zero-emissions or not in the category at all. But as contradictory as...