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!

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: How to revive car been stored for three years, cannot start, inspect, new batter, drain fluid and gas, etc?

The first thing to do is to have all of the old fuel removed, since the fuel in the tank may have gone bad which can congeal up inside the fuel tank. The fuel tank should be inspected by pulling...

Q: Belt came off while driving my 95 Oldsmobile royals. What's the reason for this?

Hi There, A drive belt may come off for a number of reasons such as a loose pulley, a worn out belt or potentially a worn out tensioner pulley bearing. I would suggest having a professional from Yourmechanic come to...

Q: Power steering Leak

The leak sound like it is coming from the rack and pinion seals. A sealer will not work for power steering pressure leaks in most cases. You will need to have the system pressure tested and then the rack and...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...