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 SYSTEMSLOCATIONS
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)
Computers and Control Systems: Locations
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)SECTION Locations
AIR FLOW METER - Top Right Of Engine
AIR INLET TEMPERATURE SENSOR - Under Center Of Fresh Air Intake 6Wh
AUXILIARY FUEL PUMP -Top Left Side Of Fuel Tank, Under Trunk
COLD START VALVE - Left Side Of Engine, Between Intake Port 3 & 4
COOLANT TEMPERATURE SWITCH - Front Of Engine
COOLANT TEMPERATURE SENSOR - Front Of Engine Top Of Thermostat Housing
DIAGNOSTIC CONNECTOR - Top Middle Of Engine, On Front Intake Manifold Bracket
ENGINE SPEED SENSOR - On Lower Left Side Of Transmission Bell Housing
FUEL INJECTORS - Base Of Intake Manifold, At Each Intake Port
FUEL PUMP RELAY - Engine Compartment, Or Power Distribution Box
IDLE SPEED ACTUATOR - Rear Middle Of Engine Compartment
IGNITION COIL - On Right Fender, Behind Headlights
KICKDOWN SWITCH - Below Accelerator Pedal
LEFT FRONT SPEED DETECTOR - In Left Front Wheel
LEFT REAR SPEED DETECTOR - In Left Rear Wheel
MAIN FUEL PUMP - Under Car, Above Left Rear Axle
MAIN RELAY - Behind Right Front Shock Tower
MOTRONIC CONTROL UNIT - Behind Right Front Speaker
NORMAL SPEED TEMPERATURE SWITCH - Lower Right Side Of Radiator (White Terminals)
ON BOARD COMPUTER MODULE - Center Of Dash; On Rear Of On Board Computer
ON BOARD COMPUTER RELAY BOX - Relay Box Mounted Under Left Side Of Dash
OUTSIDE TEMPERATURE SENSOR - Under Front Bumper, Left Side
OXYGEN SENSOR HEATER RELAY - Engine Compartment, On Power Distribution Box
OXYGEN SENSOR - Underside Of Car, On Exhaust Manifold
FUSE/RELAY BOX - Top Front Of Left Front Wheelwell
RIGHT FRONT SPEED DETECTOR - In Right Front Wheel
RIGHT REAR SPEED DETECTOR - In Right Rear Wheel
SRS - DIAGNOSTIC MODULE - Behind Right Side Of Dash, Above Glove Box Hinge
TDC SENSOR - Above Crankshaft Vibration Damper
THERMO TIME SWITCH - Front Of Engine; Top Of Thermostat Housing
THROTTLE POSITION SENSOR - Top Of Engine
THROTTLE SWITCH - Top left Side Of Engine, On Front Of Throttle Body
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.