XKR X150 high pitched noise I have a curious high pitched buzz/whine coming from area around rear nearside wheel arch/boot. Sounds electrical and is constant when ignition is on.Limited knowledge leads me to think of fuel pump and/or associated bits but any insight would be appreciated. Thanks.

 

The left rear wheel arch area is where the vacuum pump to run your exhaust valves also lives.

 

Ah....thats good to know. Thank you.