Skip the auto shop - Our mechanics make house calls

Q: Brake pedal goes all the way to the floor

asked by on

Hi, on two separate occasions, the brake pedal on my Audi went all the way to the floor. In both cases, I had to turn off the car and pump the pedal until it was restored.

I have taken the car to a number of mechanics. Everyone tells me something different. The Audi dealership said that my front calipers were broken. I'm not sure I believe the dealer, as I've been driving the car "gently." Given that I have four calipers on the car, I don't understand why the brake pedal would go to the floor even if the front calipers are broken (because the rear calipers should work, right)?

The brake fluid is full, so there is no external leaking. I've read online that this could be a sign of a bad master cylinder.

I would appreciate any guidance on this. Thanks

My car has 80000 miles.
My car has an automatic transmission.

A: If you have not lost any fluid in the maste...

If you have not lost any fluid in the master cylinder and the pedal goes to the floor, then your master cylinder must be bypassing fluid and not creating pressure. In order to have a mechanic diagnose it properly, they would need to inspect the vehicle to verify the issue. A mechanic cannot diagnose a problem they cannot verify is happening. For your safety and those around you, I would highly recommend that you have a certified brakes mechanic inspect the vehicle and resolve the issue. YourMechanic offers a repair and diagnosis service preformed by a professional mechanic that will commute to your location for the brake inspection.

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・Save up to 30%

Get a quote

What others are asking

Q: When turning on navigation system, radio comes on too

The navigation system and the radio do affect each other and use each other to work. When the navigation comes on it turns the radio on as well to provide volume for the voice directions. This is normal operation and...

Q: My 2002 Isuzu Rodeo storage cuts off starts cuts off starts cuts off

A sudden stalling issue can be caused by a few things: An ignition switch issue is possible if once the engine stalls, all power is lost as well as if you turned the key off. Depending on...

Q: deep vibration that is felt through the steering wheel, gas pedal and throughout the body. Also feels like back end sways, front

Hello. Though this can be caused by a number of things, the most common on your car is a bad engine mount. It is very common for multiple mounts to fail, but the most common is the front mount. When...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.