First time dealing with CPT sensor. Which one, and where is it.

[SlickGT1]

Hi all.

I got an SES today while driving around the city all morning. This is the second time in 2 years that this came up. I have not scanned with INPA yet. Just used my quick and dirty OBD2 cheapo scanner that I keep in the glove box.

So I have this.
P0021 - Intake (A) Camshaft Position timing - over - advanced (Bank 2)
P0355 - Camshaft Position sensor A circuit (bank 2)

I forget which is bank 1 and 2 on these cars.

Also, where the hell is this thing located. I have never had to deal with one on any of my previous BMWs.

Here is a realoem link.
RealOEM.com * BMW E53 X5 4.8is Sensors

Thanks in advance guys. Hope to place the order tomorrow.