Saab 9-3 Hissing noise when brake pedal is depressed Inspection at your home or office.

Our certified mobile mechanics come to you 7 days a week between 7 AM and 9 PM.

Estimate price near me

Service Location

Customer Ratings

(222)

How A Diagnostic Works

Instantly book a certified mobile mechanic to come to you

Mechanic diagnoses the problem and quotes necessary repairs

Your vehicle is ready to go

Fair, upfront & transparent pricing for all services

Our certified mobile mechanics can come to you now.

Customer Ratings

(222)

Hissing noise when brake pedal is depressed Inspection Service

How much does a Hissing noise when brake pedal is depressed Inspection cost?

On average, the cost for a Saab 9-3 Hissing noise when brake pedal is depressed Inspection is $95 with $0 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2008 Saab 9-3L4-2.0L TurboService typeHissing noise when brake pedal is depressed InspectionEstimate$114.99Shop/Dealer Price$124.99 - $132.49
2009 Saab 9-3L4-2.0L TurboService typeHissing noise when brake pedal is depressed InspectionEstimate$94.99Shop/Dealer Price$105.01 - $112.52
2007 Saab 9-3V6-2.8L TurboService typeHissing noise when brake pedal is depressed InspectionEstimate$94.99Shop/Dealer Price$105.01 - $112.52
2007 Saab 9-3L4-2.0L TurboService typeHissing noise when brake pedal is depressed InspectionEstimate$94.99Shop/Dealer Price$104.99 - $112.48
2002 Saab 9-3L4-2.3L TurboService typeHissing noise when brake pedal is depressed InspectionEstimate$94.99Shop/Dealer Price$105.02 - $112.55
2010 Saab 9-3L4-2.0L TurboService typeHissing noise when brake pedal is depressed InspectionEstimate$94.99Shop/Dealer Price$105.01 - $112.52
1999 Saab 9-3L4-2.3L TurboService typeHissing noise when brake pedal is depressed InspectionEstimate$99.99Shop/Dealer Price$109.87 - $117.28
2003 Saab 9-3L4-2.0L TurboService typeHissing noise when brake pedal is depressed InspectionEstimate$99.99Shop/Dealer Price$110.24 - $117.94
Show example Saab 9-3 Hissing noise when brake pedal is depressed Inspection prices

Brakes are the most important safety components on your vehicle. Despite that importance, it’s easy to take them for granted, at least until your car begins to do strange things. Ordinarily, pressing your brake pedal should result in only the car slowing down or stopping. If you hear a hissing noise when the brake pedal is depressed, it may mean there’s something that needs to be repaired in the system.

How this system works:

On many cars, the master cylinder works in tandem with a brake booster. The brake booster is mounted to the firewall, generally in front of the steering wheel position, and the master cylinder attaches to it. The entire point of the brake booster is to make it easier to press the brake pedal and slow or stop the car.

Your brake booster works on vacuum pressure. There’s a diaphragm inside that is responsible for maintaining pressure when you’re not pressing the pedal. However, when you do press the pedal, a push rod moves forward within the booster and into the master cylinder. The side of the diaphragm facing the cabin vents to atmospheric pressure, while vacuum is maintained on the other side.

This then equalizes with pressure on the other side of the diaphragm, providing the boost needed to make pressing your brake pedal easier. The hissing noise you hear when the brake pedal is depressed could be nothing more than ordinary operation, or it could be a sign of a deeper problem. There are a couple of different potential issues here, some more severe than others.

Common reasons for this to happen:

  • Leaking Vacuum Line: Your brake booster is supplied with vacuum from the engine via a vacuum hose. It’s usually located near the firewall. If this hose has a leak, it can be heard within the cabin.

  • Leaking Brake Booster Diaphragm: The diaphragm that’s responsible for maintaining pressure within the brake booster can fail, particularly if the master cylinder is leaking fluid into the booster. When this happens, you’ll hear a hissing sound when depressing the brake pedal, but the pedal itself will be much, much harder.

  • Damaged or Missing Foam Silence: Most cars equipped with brake boosters also have a foam silencer that’s designed to help prevent you from hearing that hissing sound. If the silencer has degraded or been damaged, you’ll hear the hissing sound.

  • Failing Master Cylinder: If you hear a hissing sound and suspect that the problem is the diaphragm in the booster, the actual cause is likely the master cylinder beginning to fail. Signs that the master cylinder is leaking into the brake booster include low fluid in the reservoir with no visible leaks.

What to expect:

A top-rated mobile mechanic will come to your home or office to inspect your brake system, including the brake pedal operation, the brake booster and listen to the hissing sound. The mechanic will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.

How it's done:

The mechanic will need to crank the car in order to verify the hissing sound, and a test drive may be necessary to duplicate the complaint. Additionally, the mechanic will inspect the brake pedal operation, the condition of the brake booster, the master cylinder, the level of fluid in your system and more.

How important is this service?

Power brakes are wonderful things, making it far easier to work a brake pedal that would otherwise require significant force to activate. While the hissing sound may be a sign of nothing more dangerous than a failed piece of foam, it could be a symptom of something much more worrisome – a damaged brake booster and a failing master cylinder. You cannot afford to take chances with your brake system. One of our professional mechanics can inspect the entire system and determine if there’s cause for concern, and what needs to be done if there is a problem.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Saab mechanics

Real customer reviews from Saab owners like you.

Excellent Rating

(222)

Rating Summary
207
4
3
2
6
207
4
3
2
6

Charles

25 years of experience
33 reviews
Charles
25 years of experience
Saab 9-3 L4-2.0L Turbo - Valve Cover Gasket - Tampa, Florida
Took great care of my poor little SAAB. We're down to spark plugs and possibly the ECU, but having the end in sight is wondrous. Thanks!

Scott

36 years of experience
899 reviews
Scott
36 years of experience
Saab 9-3 L4-2.0L Turbo - Heater Blower Motor - Mesa, Arizona
Scott went above and beyond to make sure my car was fixed right.

Peter

43 years of experience
1321 reviews
Peter
43 years of experience
Saab 9-3 L4-2.0L Turbo - Inspection / Diagnostics - Avondale, Arizona
excellant mechanic-

Hakim

17 years of experience
10 reviews
Hakim
17 years of experience
Saab 9-3 V6-2.8L Turbo - Replace hood release cable - Westfield, New Jersey
Hakim is a very pleasant professional. He showed up on time, calling earlier to say he was on the way. He examined to car (disabled hood release cable) and went right to work. He was able to diagnose that the cable was operable but detached, thereby saving me the expense on parts. After all the repairs were completed, my bill was much lower than estimated. The auto dealer who had originally examined the problem said it would be 5x what MyMechanic charged. This was a great value.

Excellent Rating

(222)

Rating Summary
207
4
3
2
6
207
4
3
2
6
Number of Saab 9-3 services completed
2442+
services done by our mechanics
TOTAL NUMBER OF EXPERT Saab MECHANICS
200+
experts on our platform

Recent articles & questions

A Buyer’s Guide to the 2012 Jaguar XJ
While While Jaguar has struggled in the past with breaking out into a more modern consumer base, the XJ does a good job of helping the carmaker to shed its stodgy, old-fashioned rep and enter the full-size luxury sedan market...
How Long Does a Brake Line Last?
Keeping Keeping the braking system on a car in good shape is a lot easier said than done. Most car owners out there fail to realize just how many components make up their braking system. The metal brake lines that...
How to Replace a Cylinder Head Coolant Temperature Sensor
Signs of coolant temperature sensor failures include sluggish acceleration, hard starting, and a Check Engine or Service Engine Soon Light.

Truck will not turn left or right

Depending on how the vehicle was hit, the steering gear may have been broken. I recommend having a mechanic, such as one from YourMechanic, check out your steering issue (https://www.yourmechanic.com/services/steering-wheel-does-not-turn-car-inspection) to identify and quote the repairs needed.

I have a 2008 pontiac grand prix and it will go in reverse but not in drive.

Check to be sure the gear shift linkage is actually moving the "manual lever" on the transmission case into the forward gears. If it is really shifting, then check fluid level. Low fluid level, or a clogged filter, can cause...

I’m having trouble starting my 2015 [Prius](/topics-prius/) V. My wife let it idle for 2 hours

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (844) 997-3624 · hi@yourmechanic.com