For information only.2000 BMW 328i (E46) Technical Service Bulletin # 650199 Date: 990401
Audio - E46 Radio Noise on AM Band/Poor AM Reception
Group 65
Sound System,
Cruise, Alarm, Monitors
Bulletin Number
65 01 99
Woodcliff Lake, NJ
215
April 1999
Product Engineering
SUBJECT:
E46 Radio Noise on AM Band / Poor AM Reception
MODEL:
E46
Situation:
Excessive noise on AM stations - vehicle speed dependent.
Cause:
Loose antenna coax connector on the antenna amplifier.
Correction:
Check and tighten the coax connector on the antenna amplifier.
Procedure:
Verify the complaint by road testing the vehicle. Manually tune the radio to a weak AM frequency. The interference will increase with a vehicle
speed increase. Also, strong interference will be noticed when driving under high voltage power lines.
1. Before proceeding, make sure your hands are thoroughly clean.
After verifying the complaint, remove the left (driver's) side C Pillar trim panel(1) by pulling the top out as illustrated.
2. Once the top is out, remove the trim panel (1) by pulling towards the center of the vehicle.
3. Disconnect the lamp connector on the back of the trim panel (1).
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4. Check the coax connector(1). If the connector is loose, tighten it firmly.
5. Check the remaining connectors on the antenna amplifier.
6. Reinstall the C-Pillar trim and lamp connector. Make sure the weather strip is placed over the C-Pillar trim panel (arrows).
Warranty Information:
Pants and Labor are reimbursable under the terms of the BMW New Car Limited Warranty.
Defect Code: 65 23 91 37 00
Labor Operation: OO 51 487 Verify interference, tighten Coax connector
