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 1,000 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: Power steering

Hello. This can be caused by a few different parts in the steering system. Most of the time it is caused by either a failing rack and pinion or a bad ball joint, tie rod, or a bad strut mount....

Q: The abs block does not let fluid to the rear brake lines

Hello, when bleeding brake with an ABS system you will need a scan tool to open the passages in the ABS module. This is part of the brake bleeding process. If you'd like, a certified Your Mechanic Technician can...

Q: Coolant is leaking

Hi there. There are many components that make up your cooling system. A water pump, thermostat housing, and hoses are all common places a vehicle will leak besides the radiator. A loss of excess coolant can cause your engine to...

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 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...