Bluetooth Phone Connection
 

We had issues with unlocking the door last winter. Dealer fixed it but since then the call audio through bluetooth has been terrible. Lots of road noise can heard on the other side.

The dealer says everything was set up the way it was before. Anything specific I can ask them to look for?

2005 BWW X5.

Which door? I can't think of anything door related that would affect bluetooth.

The bluetooth module is in the right rear cargo area (the unit is mounted at an angle with just a part of the rear sticking above the floor area when the pull down door is removed).

The microphone is obviously up by the sunroof switches...so again, not near anything door related.

If anything, check the connections on the BT module and the microphone above the headliner to see if all the wiring harnesses are plugged in correctly.

This is the bluetooth module (silver module mounted at an angle). To get total access to it, you need to remove the right rear plastic floor piece...again because only a small portion of the unit is visible from above the cargo floor:

It was the driver side door.

The quality of bluetooth audio is what has deteriorated. Could it just be something in the door to reduce road noise that maybe wasn't put back properly?

Not knowing which model you have (3.0/4.4/4.8is)...I have to go two ways in my (help us help you better by adding the model nomenclature to your sig :) ).

The car's various modules and systems communicate over a bus system. Communication goes in multiple directions but each system has a master control module. The IKE (instrument cluster) is like the "gate-keeper" module in that everything passes thru it if it requires passing communication over to a module in another bus.

The door and it's modules have the GM III as is control module. The bluetooth unit passes info over the I-bus (if you have the high cluster) or the K-bus (if you have the low cluster).

You can see how modules communicate and pass info in the two charts below. Again, if you have one of the V8 models...you have the high cluster (has the 20 digit/alpha numeric display) as well as the I-bus...see the top chart below. If you have the 3.0...you might have the base (low cluster) or you could have the optional high cluster if you have navigation...see the 2nd chart below (K-bus). Again, the door and it's modules get's its orders from the GM...and passes info back to it. Again, I can't think of any information in the doors that would need to pass info over the K-bus or I-bus that would interfere with bluetooth audio. If anyone sees or can think of something that I'm overlooking...please feel free to chime in.