Skip the auto shop - Our mechanics make house calls

Q: Is a leaky brake booster unsafe if fluid level is o.k.?

asked by on

Is it safe to drive with a leaky brake booster if fluid level is OK
My car has an automatic transmission.

If your brake booster is leaking but your brake fluid level is full, your brake booster would be leaking vacuum. This would mean that your booster has a crack, the check valve is bad, or the hose that connects to the booster has a crack or hole in it. I would not recommend driving a vehicle very much that has a vacuum leak in the brake system. Without the vacuum assist that the brake booster provides the vehicle, it will be much more difficult to slow down and stop.

The check valve in the brake booster is also designed to allow up to two full power brake applications after the engine has been shut off. This is in case the engine dies on the highway and you need to stop your vehicle and pull over. Without the assistance of the brake booster, if for any reason your engine were do die due to problems it has, or even if you ran out of gas, this could be a dangerous situation. I would recommend having the brake booster problem repaired before driving the vehicle as it could potentially be unsafe to drive in its current condition. For an inspection, a certified technician from YourMechanic can come to your car’s location to diagnose the brake system.

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!
  1. Home
  2. Questions
  3. Is a leaky brake booster unsafe if fluid level is o.k.?

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: Grinding and stuttering while accelerating

The grinding noise could originate in the drive train, including wheel bearings, or could even be in an accessory drive. From your description, the noise is probably distinct enough that a certified mechanic could pinpoint the origin upon inspection. If...

Q: Fuel pump will not kick on and all the fuaes and relays are fine and its hooked up right, what is the problem?

You have a circuit opening relay behind the glove box and the EFI relay in the main fuse box in the engine compartment. You will need to have the complete circuit checked to see if they are supplying power. These...

Q: I think it has a blown head gasket I was wondering for now if Bar's Leak Block seal and head gasket repair would help til I could

Hey there, thanks for writing in about your 2001 Chevrolet Impala. The stop leak is only temporary and may not even work the first time. If you use too much or not as directed it may block the radiator and...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.