Whirring noise inside cabin

[Funkyboy]

Hi all,

When I first put key in ignition I get a strange whirring noise that seems to be coming from the front seats? Lasts for a second or two then it's gone. Seems to do it each time you first start the car sometimes it will do it if you start the car later on in the day.
Anyone any idea what this maybe?

Thanks

 

[55nick]

Could it be the seat belt pre tension

 

[PobodY]

Pump for pneumatic seat cushion adjustment?

 

[Funkyboy]

Could it be the seat belt pre tension

I was thinking that but couldn't work out why sometimes it does it and sometimes it doesn't.

 

[Funkyboy]

Pump for pneumatic seat cushion adjustment?

Is it normal to make that noise particularly as it doesn't do it everytime

 

[whitenemesis]

Because the system is topping up the pressure and it doesn't always drop enough to trigger it?