How to Replace Crankshaft Position Sensor 01-07 Toyota Highlander L4 2.4L

Difficulty: Advanced · About 120 min · Toyota Highlander

Replace the crankshaft position sensor on a 2001–2007 Toyota Highlander 2.4L after removing the alternator and accessory belt for access.

Steps

1. Disconnect power and remove the drive belt

   Disconnect the negative battery terminal and note the belt routing diagram. Relieve tension at the belt tensioner, remove the serpentine belt, and slowly release the tensioner.

2. Remove the alternator and sensor harness

   Disconnect the alternator output cable and electrical connector, release the harness retainers, and remove the alternator mounting bolts. Move the alternator aside, then unplug the crank sensor and free its wire from the brackets.

3. Remove and replace the crank sensor

   Remove the belt shield fasteners and move the shield away. Remove the sensor bolt and withdraw the sensor; lubricate the new O-ring lightly with clean engine oil, seat the replacement, and tighten the bolt to vehicle specification.

4. Reinstall the alternator and belt

   Route the sensor lead through its original retainers, reinstall the alternator, and reconnect its plug and output cable. Route the belt according to the diagram, rotate the tensioner to fit it, and verify every rib sits in the pulley grooves.

5. Reconnect power and verify

   Reconnect the battery and start the engine, checking for belt noise and warning lights. Scan for diagnostic codes if the original fault remains and inspect the sensor connector and harness for damage.

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