How to Replace Intake Cam Sensor 01-05 BMW 325Xi

Difficulty: Intermediate · About 60 min · Bmw 325xi

Replace the intake camshaft position sensor on a 2001–2005 BMW 325xi after removing the cabin filter tray and intake components for access.

Steps

1. Disconnect power and clear access

   Disconnect the negative battery cable. Remove the cabin air filter and tray fasteners, release the wiring retainers, and lift the tray out; remove the engine covers and disconnect the breather hose from the valve cover.

2. Move the solenoid and intake box

   Unplug the variable valve timing solenoid and remove it as needed for clearance. Unplug the airflow sensor, loosen the intake clamp, release the air box latches and mounting bolts, then lift the air box out.

3. Replace the intake cam sensor

   Unplug the cam sensor connector and release its wire routing. Remove the sensor retaining screw, withdraw the sensor, clean around the opening, then install the replacement and route its lead through the original path before reconnecting it.

4. Reinstall intake components and tray

   Refit the air box, intake duct, and airflow sensor connector. Reinstall the solenoid and breather hose, then refit the engine covers, cabin filter tray and filter, and reconnect the battery.

5. Verify the repair

   Start the engine and confirm normal idle and no warning lights. If a fault remains, scan diagnostic codes and inspect the sensor connector and harness for damage or poor contact.

Check your vehicle’s repair manual for exact specifications and fit.