Q: I changed a brake booster and after driving the brakes seized up, any idea why

asked by on September 17, 2017

I had a brake booster with a vacuum leak so I replaced it with a new one. I took it on a short test drive and everything was working perfectly. I later took it on a longer drive and then noticed that the car was slowing down on its own and the brake pedal became very firm. Eventually, the brakes seized up. After sitting for about an hour, the brakes loosened up enough that I was able to get it home but they were again tightening up by the time I got it back into the home garage. Do the brakes need to be bled? Is the booster possibly bad?

My car has 7000 miles.
My car has an automatic transmission.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

What do the different alarms mean?
Your car is equipped with a security system, but it also has an intelligent monitoring system that will alert you to certain conditions by sounding the alarm. Here’s what you need to know about the alarms and the action you...
How do I decline a call?
When a paired phone receives a phone call, it will come through the sound system, even if the sound system is currently playing something. To decline the call, press the Phone End button.
Bluetooth prevents accessing Destination Assist
Hello there, a few different faults can cause the bluetooth system to act up like this. The most common issues include a wiring fault, phone incompatibility, or bluetooth module failure. A qualified technician, such as one from YourMechanic, will be...
Door ajar' light keeps dome light continually on
Hello. Normally, the cause of this problem is that the door lock switch is sticking or has failed completely. The door lock switch is located in the door jam, usually near the door latch. When the door lock switch gets...
I press the gas pedal but the car isn't getting gas. The engine doesn't rev up.
Good question. I want to go through a few steps with you and hopefully find your problem and save you some time and money. If you find the issue during steps, then ahead and fix that fault and you should...
My RPM's on my car keep revving up, but won't go past 2,000
Hi there. A rough idling engine can be caused by a number of issues, some of them are serious while others tend to be minor, but the symptoms remain pretty much the same. The car will feel rough and bouncy...
I have a 07 jeep grand chrokee. While i was driving everything shut off
If you mean that everything is non-functional, as if you switched the ignition off, then there is most likely an electrical issue. If absolutely nothing comes on (lights, radio) when you switch the ignition on, the ignition switch may be...
Engine start and open its oil cap its get dancing on that means air pressure come is it OK or some problem
Hi there. Anytime you start the motor, the oil cap needs to be kept on tight. The cap is responsible not only for keeping oil from spilling and escaping, but most importantly, maintaining a consistent vacuum pressure inside the motor....
My wife's 2013 Chevy Sonic is making a ticking noise from the engine, does not do it every day, but when it does, shifting is a little
Hello. Most of the time on this engine the noise comes from the valve train. It is usually from the variable valve timing system and is considered normal. If the noise is getting very loud then it may have an...

Related articles

Pontiac Certified Pre-Owned (CPO) Car Program
If If you’re in the market for a used Pontiac vehicle, you may want to check out cars under their certified pre-owned program. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. Read on...
Understanding the Pontiac Oil-Life Monitor and Service Indicator Lights
Car symbols, or dashboard lights, are a car service reminder. The Pontiac Oil Life Monitor (OLM) indicates when and what service your car needs.
How to Buy a Classic Pontiac
Whether you want to buy a classic Pontiac for yourself or as a gift, here are some tips on buying one for a great value.