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・Save up to 30%

Get a quote

What others are asking

Q: Clutch slave cylinder is most likely bad. Will refilling the brake fluid help?

Hi there. Most of the time, if the fluid is empty, it will have pulled in enough air to keep the clutch system from working. You can try adding fluid, but, when you press the pedal, the air will compress...

Q: Air shock and suspension problem

The air suspension motor may have failed and would need to be tested for operation and go from there. Having a faulty air suspension can lead to trouble or damage if you are driving over bumps. I recommend having a...

Q: Van malfunctioning with no inside power.

Your van may have a totally integrated power module that has failed to turn on. You can try and remove the keys, lock all the doors, cycle the door locks with the remote to lock and unlock the doors. If...

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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.