Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW1987L7 (E23) L6-3430CC 3.4L SOHC (M30)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULETECHNICAL SERVICE BULLETINSCUSTOMER INTERESTRADIO - HIGH FREQUENCY INTERFERENCE
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)
Radio - High Frequency Interference
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)SECTION Radio - High Frequency Interference
87BMW04
GROUP 65 Radio and Accessories
Bulletin Number 65 10 87 (1464) Page 1 of 2
Montvale, NJ August 1987 Technical Dept.
SUBJECT: Radio Interference
MODELS: E 32 (up to 4/87 production) E 30 (1/86 to 4/87 production)
Situation: With the ignition in the "Accessory" position only, a high frequency noise may be heard in the background while tuned to an FM station.
The source of the noise may be caused by the S.I.I. (Service Internal Indicator) printed circuit board and, additionally, in the E32, the OBC (On-Board-Computer) III module.
Diagnosis/
Repair: 1) Verify that the noise is only audible in the "Accessory" position by turning the ignition to the "Run" position.
2) Disconnect the electrical connectors from the instrument cluster. If the noise goes away replace the S.I.I. printed circuit board:
Model Part Number
E30 62 11 1 385 080
E32 62 11 1 382 963
Note: (E32 only.) If the noise remains after the S.I.I. printed circuit board has been replaced, disconnect the OBC Ill module. If the noise goes away with the OBC Ill module disconnected, replace the OBC III module with a new one.
Warranty
Status: Parts and labor reimbursable under, the provisions of the BMW 3 Year/36,000 Mile Limited Warranty.
E30
Defect Code: 00 00 62 12 00
Labor Operation: 62 11 030
Labor Allowance: 9 Flat Rate Units
E32
Defect Code: 00 00 62 12 00
Labor Operation: 62 21 000 + 62 11 555
Labor Allowance: 7 Flat Rate Units + 1 Flat Rate Unit
GROUP 65 Radio and Accessories
Bulletin Number 65 10 87 (1464) Page 1 of 2
Montvale, NJ August 1987 Technical Dept.
SUBJECT: Radio Interference
MODELS: E 32 (up to 4/87 production) E 30 (1/86 to 4/87 production)
Situation: With the ignition in the "Accessory" position only, a high frequency noise may be heard in the background while tuned to an FM station.
The source of the noise may be caused by the S.I.I. (Service Internal Indicator) printed circuit board and, additionally, in the E32, the OBC (On-Board-Computer) III module.
Diagnosis/
Repair: 1) Verify that the noise is only audible in the "Accessory" position by turning the ignition to the "Run" position.
2) Disconnect the electrical connectors from the instrument cluster. If the noise goes away replace the S.I.I. printed circuit board:
Model Part Number
E30 62 11 1 385 080
E32 62 11 1 382 963
Note: (E32 only.) If the noise remains after the S.I.I. printed circuit board has been replaced, disconnect the OBC Ill module. If the noise goes away with the OBC Ill module disconnected, replace the OBC III module with a new one.
Warranty
Status: Parts and labor reimbursable under, the provisions of the BMW 3 Year/36,000 Mile Limited Warranty.
E30
Defect Code: 00 00 62 12 00
Labor Operation: 62 11 030
Labor Allowance: 9 Flat Rate Units
E32
Defect Code: 00 00 62 12 00
Labor Operation: 62 21 000 + 62 11 555
Labor Allowance: 7 Flat Rate Units + 1 Flat Rate Unit
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.