Hi - I have a 2011 4.4 TDV8, my Parking Sensors don't work and the fault code (B1B52-01) suggests that the rear sounder isn't working.

Having looked into it I think its missing altogether, getting photo of this though to confirm its location has been really difficult - please could someone confirm if in the UK for a 2011 it's located on the driver's side (RHS) cubby in the rear? I've two wires there that I am almost certain should be connecting to it but can't find the actual speaker anywhere so it may have been removed?

The PDC module itself is actually in the opposite side (LHS) cubby in this years model, I've seen in earlier years it was located behind the rear fuse box in the RHS but they seemed to have moved it over but I suspect the speaker itself might still be there or not in my case!

The sounder is a black circular object attached to a metal plate in the driver's side (RHS) rear cubby. Hope the attached pics help a bit.

Click image to enlarge

Click image to enlarge

Thanks for the pictures - very helpful and confirmed that the wires I'd found were for the speaker.

One arrived today in the post today, just fitted it and all my sensors are up and working, both front and back - which also seemed to confirm that a fault in the system - either front or back disables both.

Interestingly enough mine doesn't actually have the bracket that I can see where your speaker was attached - but I can see a couple of bolt holes where something like that may have been attached, although it doesn't look bolted on in your version - no idea why someone took the time to remove it - but its working now, so another job ticked off!