Skip the auto shop - Our mechanics make house calls

Q: what would cause leak of brake fluid that leaves puddle behind rear driver wheel

asked by on

Every day we have to put brake fluid in reservoir and we find a puddle or brake fluid behind driver rear wheel

My car has 215000 miles.
My car has an automatic transmission.

A: The best way to inspect an issue like this ...

The best way to inspect an issue like this is to look for the leak. The easiest way to do this is to remove the front tire. Open the hood and locate the master cylinder. Start with a full reservoir, and have someone apply the brakes. You should be able to see where the fluid is coming from without much issue. This is the component that has failed, and will likely need replacing. The common components to fail are the brake calipers, the lines, any connections, and the master cylinder. Just remember, if replacing the leaking component at home, you must bleed the brakes after the repair is made. Be prepared for this final step before you plan on making the repair.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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

Q: Brake pedal going all the way to the floor.

The pedal going down to the floor usually indicates a loss of hydraulic pressure. Possible causes include a leaking brake hose, a dysfunctional caliper, or a wheel cylinder. Also a master cylinder leaking either externally or internally will cause the...

Q: Broken Calliper Pin Bolt

Hello, thank you for writing in. The caliper mounting bolt is not necessarily a "specific bolt". You can use another bolt if you have one. There are a few things you want to keep in mind. The first is that...

Q: I have a 2005 Chrysler 300c hemi. Yesterday I noticed the car was making a sound like driving over rumble strips between 40 and 60 mph.

Check the front wheel bearings on your vehicle. A failing wheel bearing that is dry of grease will cause the rumble sound. Jack the vehicle up and spin the front wheels and listen for the noise. If the noise is...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...