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.

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!
  • Home
  • Questions
  • what would cause leak of brake fluid that leaves puddle behind rear driver wheel

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: Power brake booster is leaking

Hello, a brake booster is an important part of the braking system, and should be repaired sooner than later. Since the brake booster uses vacuum to assist in applying the brake pedal, if the vacuum leak becomes too great, it...

Q: Engine won't turn over.

Hello there, thanks for your question. Removing the dash of your 2007 Chevrolet Cobalt is a large job requiring the removal of many components. Since the problems started after the dash was removed than the repair likely caused the no...

Q: I would like to know what can be causing my coolant to drain quickly to the point where i have to re fill it every 2 days no leaks

There is a leak somewhere and if there is no leak, from an external source, then the engine is leaking internally. My recommendation is to have a coolant pressure test and a combustion leakage check on the radiator. This will...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.