F10 antenna diversity

  • image This is a picture of the antenna diversity on a F10,,,,the antenna diversity is sitting just behind the third brake light,,,,on some other cars it sit inside the rear trunk area or on the rear trunk inside lid,,,,the customer was complaining about both key remotes won’t lock or unlock the car,,,,and the car will not Identify the key remote,,,,the only way to start the car was to hold the key remote up to the side of the steering column,,,,during the test I first tried new key remote battery,,,that didn’t work to easy,,,,tried BMW test plan and they said both key remotes were bad,,,,will I thought what are the chances both key remotes are bad at the same time,,,,not likely,,,,while holding the key remote up to the steering column the keys would identify the VIN number of the car,,,,,so I knew the key remotes were good and the CAS was ok,,,I had a antenna issue,,,I checked the interior antenna which is behind the ashtray,,,,,that was ok,,,,I finally tried a new antenna diversity which controls all the smaller antennas and sends the signal to the CAS and the JBE units,,,,good new no programming or encoding for this unit,,,,,just plug and play.
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