Sending Units & Sensors
WARNING: This page is about a different car, the 1999 BMW M3, 1999 BMW 328is, 1999 BMW 328i, 1999 BMW 323is, and 1999 BMW 323i. However, it is still accessible from the selected car via links, so may be relevant.
SENDING UNITS & SENSORS
| Component | Component Location |
|---|---|
| ABS Pedal Travel Sensor | On right side of brake master cylinder. |
| ABS Speed Sensors (4) | On each wheel hub above brake caliper. |
| Airflow Sensor | Left side of engine compartment, near shock tower. |
| Brake Pad Sensor (Left Front) | On left front wheel, above brake caliper. |
| Brake Pad Sensor (Right Rear) | Behind right rear wheel. |
| Camshaft Position Sensor (Cylinder Identification) | On front of engine, below intake manifold. See Figure. |
| Crankshaft Position/RPM Sensor | On front of engine, at pulley. See Figure. |
| Driver's Side Impact Sensor | In lower left "B" pillar. |
| Dual Temperature Sensor (Coolant Temperature) | On right front of engine, below intake manifold. See Figure. |
| Engine Coolant Temperature Sensor | On front of engine, below intake manifold. See Figure. |
| Evaporator Temperature Sensor | On right side of left footwell, left side of plenum. |
| Fuel Level Sensor | Under left side of rear seat. |
| Fuel Tank Pressure Sensor | On right rear wheelwell, behind trim panel. |
| Fuel Tank Sensor II | On top of fuel tank. |
| Hall Effect Camshaft Sensor | On front of engine. |
| Heat Exchanger Temperature Sensor (Left/Right) | On center console. |
| Hot Film Air Mass Meter | On intake fresh air duct from air filter. See Figure. |
| Intake Air Temperature Sensor (318is) | Left side of engine compartment, in air cleaner assembly. See Figure. |
| Intake Air Temperature Sensor (323i, 328i & M3) | On left side of engine, near oil level stick. |
| Knock Sensor | On top front of engine. See Figure. |
| Oil Temperature Sensor | On left side of engine. |
| On-Board Computer Temperature Sensor | In engine compartment, near right headlamp. |
| Outside Temperature Sensor | On rear of engine compartment, behind right fresh air intake. |
| Oxygen Sensor (2) (318is) | Under center of vehicle, forward & rear of catalytic converter. |
| Oxygen Sensor I (2) (323i, 328i & M3) | Under center of vehicle, forward & rear of catalytic converter. |
| Oxygen Sensor II (2) (323i, 328i & M3) | Under center of vehicle, forward & rear of catalytic converter. |
| Passenger's Side Impact Sensor | In lower right "B" pillar. |
| Rollover Sensor | On lower left "C" pillar behind side panel. |
| Seat Occupancy Detector | Under right front seat. |
| Throttle Position Sensor | On throttle body. See Figure. |
| Vehicle Speed Sensor | Under rear of vehicle, on differential. See Figure. |