That is the housing for the paper type oil filter it has a 36mm hex head on the top its usually quite hard to remove but you can buy a socket for about £6 which makes the job alot easier

Hello I had the same problem, the abs light was coming on every 2 or 3 days for months along with other faults so I took it to an independant volvo specialist who put it on a computer and found loads of codes stored on the car, one of them was the abs sensors on the hubs x3 but he told me this was b...

The fuel filter is located in front of the rear road wheel o/s/r on uk cars and there are 2 types, it is easy to see without the need to raise the vehicle off the ground