Skip the auto shop - Our mechanics make house calls

Q: Brake pressure drops with bumpy roads

asked by on

For whatever reason, my 2011 Toyota Prius with only 50,000 miles on it cannot keep brake pressure when going over bumps. Now, once I knew to expect it, single bumps are ok. Bumpy roads, though, are terrifying. I never know how long it will take me to stop so I go very slow, giving Prius drivers everywhere a bad name. I need to fix this, pronto. What part is likely to be the culprit?

A: The brake accumulators on the Prius earlier...

The brake accumulators on the Prius earlier models were prone to crack from vibrations and cause brakes pressure loss. I would contact your dealer to run your vehicle identification number to check to see if your brakes are covered under a brake recall. If you are not covered under any recalls then I would suggest contacting YourMechanic to verify the issue and test the system for any computer codes.

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: What does the headlight control sensor do?

If your car has automatic headlights, then it also has a headlight control sensor. Essentially, this is what’s responsible for turning your headlights on and off based on ambient light levels. The sensor is located on the dash near the...

Q: Hybrid has a rough time starting

The Prius uses the small 12 volt battery to operate the computer and accessories. It uses the big hybrid battery to crank over the engine by turning the electric drive motor. If the 12 volt battery dies, you cannot power...

Q: Wheel lug nut off safety?

Hi there, Anytime there is a missing lug nut or lug bolt, the question of why it is missing must be asked. If one of the nuts is missing, there is a good chance it was never tightened down...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
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.