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

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: CV Axle stuck on front let side! All wheels move but this one. Can it be fixed?

Hi there, That clicking noise was a precursor to a more serious problem, the component failure you're experiencing. The noise is created when either the cv axle or wheel bearing has run low on lubricant or is at the beginning...

Q: Car cranks but won't start

Hello. A no start condition can be caused by many things. A few common causes are issues with the fuel, ignition, or engine management systems. It may be possible that one of the components to these systems, such as the...

Q: Power steering pump leak? / steering binding

The leak at the power steering pump should be fixed but the leak is not likely to be reducing the available pressure in the system. It is the hydraulic pressure (very high, on the order of 1,000 PSI or more)...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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.