Question about 2003 BMW 325

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2004 325i recently the car started making a hissing sound

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  • yellowbone19 Aug 02, 2008

    car makes a hissing sound

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Inspect the belts for a crack the idler pully can cause this sound and is common on this car

Posted on Sep 12, 2008

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I have a 2005 Pontiac that makes a hissing noise underneath the car. you can turn the car ignition on without fully starting car and it still makes hissing noise then stops.HELP!!!!!


There is a distinct sound that has a hissing component when you first turn on the key. It will last a second or two when the key is turned to the run position. When the engine started the sound will return and continue to produce the noise so long as the engine is running.

A relatively low noise is normal. If you are concerned check other like cars for the loudness level.

how to check your fuel pump

The pressure regulator on the fuel rail can also produce a sound when the fuel pump is running. The regulator is under the hood and any reasonable noise would not be a concern, A clicking sound is also normal throughout the fuel system when the engine is running created by the fuel injectors cycling.

Dec 28, 2015 | Pontiac Cars & Trucks

1 Answer

1996 Buick Park Avenue Ultra making a hissing noise when I press Brake Pedal. Have to Press super hard to stop or slow down.


Sounds like a possible air pocket in the braking system. Do you know how the bleed the brakes? They may need to be bled. Also, if you've added brake fluid recently, and didn't put the cap back on, it could create a suction. Another note is to check the cap to the brake fluid reservoir. It's rare, but, it could be bad.

Jul 10, 2013 | Cars & Trucks

1 Answer

No brakes making a hissing sound


where is hissing sound coming from under hood or behind tire the brake booster is a vacuum and another thing is a caliper may be leaking or maybe brake line

Dec 05, 2012 | 1996 Ford Thunderbird LX

1 Answer

2001 Honda CRV makes a hissing sound (HISS HISS HISS HISS ) when makins a sharp left turn while going down a hill at about 30 MPH. The sound continues for about a mile after comming out of the turn a


sounds to me like something is rubbing on the tire. best bet would be to put the vehicle on stands and have a buddy turn the wheel back and forth while you watch from underneath. hope this helps

Mar 12, 2012 | Honda CRV Cars & Trucks

1 Answer

Car slows down almost to complete stop, low rpm's. Loud hissing


sounds like your catalilic converter is plugged up with the information you have given me,That is part of your exhaust system

Sep 01, 2009 | 2004 Ford Taurus

1 Answer

1998 dodge stratus makes a hissing noise inthevent


is there an odor??
sounds like maybe a leaky a/c evaporator core!!

Jun 18, 2009 | 1998 Dodge Ram 2500 2WD

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Engine is making hissing sound.


That hissing could be a vaccuum system leak, have youe tried pinpointing the sound from under the hood?

Feb 19, 2009 | 2005 Chevrolet Trailblazer Ext

1 Answer

Car hissing sound


The noise maybe the p/s pump fluid return,GM had some problem with this but nothing bad. GM makes a resticter that goes in the return line of the pump, it will slow the fluid down going back in the pump stopping the hissing sound.

Jan 31, 2009 | 1994 Buick Skylark

2 Answers

MITSUBISHI Lancer GLX 1998 Manual transmission...


look for a vacume line broken or rotted off

Jun 11, 2008 | 2003 Mitsubishi Lancer

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