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 MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSCRANKSHAFT POSITION SENSORDESCRIPTION AND OPERATIONENGINE SPEED SENSOR
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)
Engine Speed Sensor
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)SECTION Engine Speed Sensor
Fig. 11 Speed sensor/Reference sensor:
The engine speed sensor is mounted on the bellhousing, adjacent to the starter ring gear. The teeth of the ring gear, cause electrical pulses in the speed sensor with each crankshaft revolution. These pulses are sent to the ECU to determine engine rpm.
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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.