Q: Sometimes when I have foot on break it releases puff of air-I hear it&feel it get hard.back to normal once driving. Vw 2005 Beetle

asked by on

Sometimes when I keep my foot on the break, it suddenly releases a "pffffff" sound. New issue! (Cold dash light is on in am so I warm engine for 3mins & I naturally keep foot on brake.) I hear the puff of air releasing, and with that "pffffff" sound, the break petal becomes very stiff and hard. It moves itself up. But my breaks themselves are working just fine- none of the "need breaks replaced", according to my involved research. Get TERRIBLE gas mileage, stays in (automatic) 2nd gear A LOT when car is smooth sailing and even on flat roads. My idle speed, I guess? Esp after I go over a speed hump slowly, then press foot on gas, it skips 1st and 2nd feel. Are these two issues related? If not, please discuss the issue which needs IMMEDIATE attention 1st. So it's a problem due a puff of air coming UP thru the pedal, NOT down. When I break, there are ZERO signs of needing replacements. NOT squeaking at all nor any "loose" feeling, I'm able to stop perfectly fine. Help!!

My car has 44538 miles.
My car has an automatic transmission.

The problem sounds like your brake booster is leaking vacuum and will need to be replaced. The brake booster helps you apply the brake and if it is leaking or the check valve that supplies vacuum to it is leaking then you could loose power brake assist. Have the brake booster system checked for problems as soon as possible.

Was this answer helpful?

Hi there. To be honest, it appears you’ve got multiple issues happening with your car, but possibly due to minor component problems. First off, without being there to test drive and listen to the brake noise, it’s very hard to tell you what could be causing this. On older cars, this type of noise was an indicator of a brake booster issue, but with ABS systems today, this is highly unlikely. However, one possibility would be a vacuum leak somewhere in the engine. This would explain the bad gas mileage and in many cases, the transmission shifting issues. Before attempting ANY repairs, I would strongly recommend having a professional mobile mechanic first come to your location to complete a car is making a noise inspection, to determine what’s causing the brake ’pfft’ noise issue - for safety purposes. During their inspection, they can also inspect the vehicle for other problems. This is the best way to determine what’s going on with your VW, reduce repair costs and ensure the right repairs are completed.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Sometimes when I have foot on break it releases puff of air-I hear it&feel it get hard.back to normal once driving. Vw 2005 Beetle

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: Don't know if it is faulty crank o2 or cam o2. All ready replaced mass air flow. It ran better for short amount of time. Thanks

Hello. Thank you for writing in. There are a few issues that may be at play, and you may be fighting more that one problem at once. The heater not working correctly is because there is an issue with the...

Q: Wheel bearing going bad

A wheel bearing noise can be identified by a loud growling noise which can get louder with increased speed. A failed bearing can also be identified by jacking the vehicle up and checking for play or movement in the suspected...

Q: Q: Brake lines leaking.

Brake lines are known for rusting out and leaking. I would recommend a technician from YourMechanic come out and replace it as needed.

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...
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.