Volvo 2.5 5-cylinder Oil Filter Housing Kit / Whistle Noise Oil Trap PCV 

Part Number: 31338685

Part: VOLVO OIL FILTER HOUSING C30 C70 S40 S60 V50 V60 XC60

Replaces: 31338684, 30788494, 30684381

Part Notes: 2.4L. 2.5L turbo.

To fit: 5 Cylinder petrol engines 2.4 and T5 . From engine serial number 3285662 onwards 

Volvo S40 2004-2013

Volvo V50 2004-2013

Volvo C30 2007-2013

Volvo C70 II 2006-2013

Also Fits Ford Focus ST 2.5 5 cyl.Turbo

A known issue exists with the oil filter housing in that if a valve inside fails a whistling noise can be heard. 

This often disappears if the dipstick is removed.