Cellular Phone Antenna - Whistle
Group 65Radio and
Accessories
Bulletin Number
65 01 93 (3727)
Woodcliff Lake, NJ
March 1993
Product Engineering
SUBJECT:
Cellular Telephone Mast Antenna Whistle/Removal
MODELS:
All equipped with BMW Cellular Telephone
Situation # 1:
Cellular telephone antenna masts may create a whistling noise at highway speed. In every case investigated, the noise was caused by improper mounting of the antenna.
Correction:
In case of customer complaint, examine the mounting of the antenna. The base of the cellular telephone antenna assembly must be at least 1-3/4 inches lower than the bottom of the rear window trim. Refer to the illustration. If the antenna is mounted too close to the trim, the antenna base will be in the airstream at speed and create a whistling noise. Also, if the antenna is mounted too far down on the rear window, a different part of the antenna is in the airstream which can also create wind noise. Remove and remount the antenna base in the proper location with remounting kit (P/N 99 99 9 737 727). It is advised to refer to the specific installation instructions for the model of telephone and vehicle to determine the exact proper location for antenna base mounting.
Situation # 2:
Cellular telephone antenna masts cannot be unscrewed from antenna base sockets for car washes or theft prevention. The painting process on the antenna assembly has bonded the antenna mast threaded insert to the socket in the base.
Correction:
In case of customer complaint, detach the antenna mast portion along with the threaded insert and socket by removing the two screws from the side of the antenna mounting base (shown in illustration). Place the mast on a workbench, and carefully score around the "waist" of the socket joint with a knife (area indicated in illustration) to break through the paint. Wrap the parts in cloth to prevent marring the paint, and twist the two sections counterclockwise carefully with two pairs of pliers.
If the above process (or similar attempts by customer) has chipped or marred the paint extensively, replace the antenna mast socket (P/N 65 22 1 467 985).
Parts Information
Antenna Remounting Kit 99 99 9 737 727
Replacement Antenna Mast Socket 65 22 1 467 985
Warranty Information:
Parts and labor covered under the terms of the applicable BMW New Car Limited Warranty.
ANTENNA MAKES WHISTLE NOISE
Valid for port installed phones ONLY (e.g. 750iL, 850i)
Defect Code: 65 61 04 77 BV
Labor Operation: 65 99 000
Labor Allowance: 3 FRU
ANTENNA MAST CANNOT BE UNSCREWED
Valid for all models W/BMW CMT1000 or CMT1000VR cellular telephone
Defect Code: 84 50 01 75 AQ
Labor Operation: 65 99 000
Labor Allowance: 3 FRU