[Taylortony]

Sound a bit like a transformer / motor hum, not there in morn when cold, but after driven if I turn ignition off give it a sec then turn it on you hear a quiet hum until the abs light extinguishes on the panel...
Had the haldex controller renewed about a month or so ago.

 

[nelmanners]

Hi, Might be the fuel pump thats at the back. Mine also "hum" while the ignition is on and then stops after a second or so.

Cheers
Werner

 

[Taylortony]

Cool..... Had visions of dollar signs floatIng past my eyes, not noticed it before, but probably wasn't listening for it, makes sense as if I flick ignition off and on it does not do it.