My 55 plate 330d touring, E91, has NON comfort access key fobs. Neither unlock/lock doors, but both start the engine. I have replaced the battery in one of them, not easy as they are not meant to be replaced as they should charge while in ignition. It is now emitting a good signal when i checked with my key transmitter. However still nothing!

I believe the problem is with the diversity antenna/amplifier, which is located under the boot spolier, which can apparently get wet and fail.

Upon inspecting it, the ribbon which plugs into the lower left, is partialyl severed. It was a wide and a narrow metal track within it. The wider one trails up and to the right, at the top of bootlid, it looks fine.

But the narrow track, which trails left, has split. Could this be the problem. I don't know where it goes to. The part number written on the ribbon is:

6520693305-03, or 1081 610 7 -05

I can't find this part anywhere. Can anyone help?

I have taken pics but don't know how to upload them on here