Q: My brake pedal is rock hard and extremely hard to press to get the car to stop...what might be wrong with it?

asked by on March 29, 2017

I drove my car to the airport Friday and when I got back on Monday I found out that my brakes had suddenly become extremely hard to depress almost to the point that it's hard to come to a complete stop...they were completely fine on Friday. What could be causing this? Is it the brake booster or possibly the booster vacuum pump? Or even maybe a vacuum line to the pump itself

My car has 157000 miles.
My car has a manual transmission.

Brake Pedal is hard to push Inspection $79.99 - $89.99 Get a Quote

Your supposition is a reasonable one. That is, if there is no mechanical or hydraulic fault with the brake components, then the power assist is probably not working. The booster could be leaking, the internal valving defective, a bad check valve and/or something as simple as a disconnected vacuum line could be causing the problem. If you like, please request a brake assist diagnostic and repair and the responding certified mechanic will get this taken care of for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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

What others are asking

Right front brake?? comes on when turning on a left hand curve in the road. not every curve but always the same curve.

This is definitely an odd symptom, however it sounds like there may potentially be a brake line (possibly to the right side caliper) being pinched or hung up causing the caliper to grab when turning left. This is something that...

Vibration on the right rear of my vehicle

The good news is you know which wheel the sound is coming from. Locating which wheel is making a noise is often a challenging task. Unfortunately, it sounds as though you need a wheel bearing. When the noise is this...

Engine turns off when driving, cannot restart

Hello. It sounds like you have a voltage problem. It may be a bad connection at the battery or at one of the ground connections. Both will commonly occur. Any loss of voltage will cause some serious module communication issues....

My truck runs till it gets warm then acts like it has no power.

Hi there. It seems that your vehicle has multiple malfunctions that are happening at the same time. The idle air control valve has a fault, evaporative emission system has a large leak, the gear ratio is incorrect, and knock sensor...

Loose steering wheel

Hello. Thank you for writing in. The vehicle may be having one of several issues. Typically the steering wheel is not the issue when the steering becomes loose. Now if the entire steering column is loose, you can worry about...

The temperature gauge is fluctuating but not over heating, I have changed the thermostat, the sender, and it still dose the same

Hello, thank you for writing in. The vehicle's cooling system may be having more of a technical error. With the sensor and thermostat both giving correct measurements, the issue is an actual temperature fluctuation. This can also be caused by...

what needs to be removed to replace oil pan on a 2006 Kia Sedona?

If the defect is in the lower pan, you need only remove the lower engine cover. If the upper pan is damaged and has to be replaced, you'll need the Service Manual as removal of the upper pan is a...

If I take my foot up off the as it might shoot forward

Hello! Thank you for writing in with this question and concern. A surge like this could be caused by any number of electrical sensors (intake temperature sensor, throttle position sensor, etc.). It could also be caused by a mechanical malfunction...

Car was weak starting and would barely go once I tried to drive it.

It sounds like your battery or your alternator is getting weak. When the vehicle starts slowly and seems to have trouble, this is usually related to a dying or dead battery. The alternators job is to charge the battery while...

Related articles

How Long Do Brake Rotors Last?
Brake rotors, sometimes called discs, are an important component of the braking system on any vehicle. The brake rotors are the part of...
Top 10 Brake System Issues Every Car Owner Needs To Know
Every driver should know how to check for problems with car brakes. Warped rotors, leaky brake hoses, and squeaky brakes are among the most common.
I Hit the Brakes Very Hard. Did I Create a Flat Spot on My Tires?
Almost Almost everyone, at some point in his or her driving experience, will slam on the brakes. Slamming on the brakes is generally more than just an emotional response to a situation. When you're avoiding an accident or reacting to...