Hissing Sound from under car

[Loperamide]

Hi guys,

Could you tell me what the 'hissing' sound is in the below link. It's coming from under the car.

Thanks.

https://www.youtube.com/watch?v=CQMqLDocGrs

[XP3NNY]

This is not probably going to help you, but looking at the video it looks like you have oil leak, which might be a good starting point.

Cheers

[Loperamide]

oil leak has nothing to do with the hissing sound?

[Horizon]

Most common " hissing sound is leaking airbags on the rear suspension
Get some diluted fairy liquid in a spray bottle and douse the rear airbags, this will result in bubbles from the offending item
The E70's seem the worst offender.

[Loperamide]

As seen the video the sound is at the front. Maybe 'hissing' is the wrong term i am using.

Can you not hear the sound in the video? it comes and goes constantly and changes pitch.

[mr angry]

I can hear the noise although not clearly. It may be a noisy aux belt tensioner/idler as mine sounded similar.