How to Replace Serpentine Drive Belt Tensioner 01-07 Toyota Highlander L4 2.4L
Difficulty: Intermediate · About 75 min · Toyota Highlander
Replace the serpentine belt tensioner on a 2001–2007 Toyota Highlander 2.4L, routing the belt correctly and checking for smooth tensioner movement.
Tools you will need
- 14mm Wrench
- Torque Wrench
- Rust Penetrant
- Pry Bar
- Jack Stands
- 19mm Socket
- 21mm Socket
- Rubber Mallet
- Flat Blade Screwdriver
- Dead Blow Hammer
- Ratchet
- Floor Jack
- 1/2 Inch Breaker Bar
Parts and supplies
- Serpentine belt tensioner
- Serpentine belt, if worn
Steps
Remove the serpentine belt
Record the belt path before starting. Rotate the tensioner clockwise with a breaker bar to create slack, remove the belt from the alternator, and slowly release the tensioner.
Remove the wheel and belt shield
Loosen the passenger-side wheel nuts, raise and support the vehicle, and remove the wheel. Remove the belt shield fasteners to reach the tensioner mounting bolts.
Remove the old tensioner
Loosen the upper and lower tensioner fasteners and lift the assembly from the engine. Compare the old and replacement parts for matching pulley alignment and mounting points.
Install the new tensioner
Position the replacement tensioner and start its fasteners by hand. Align the lower mount, tighten the fasteners to the vehicle's specification, and reinstall the belt shield.
Route the belt and reinstall the wheel
Follow the routing diagram to loop the belt around each pulley. Rotate the tensioner to fit the final span, release it slowly, and inspect every rib before refitting the wheel.
Verify belt operation
Tighten the wheel nuts to specification in a star pattern. Start the engine briefly and confirm the belt tracks straight and the tensioner moves smoothly without noise.
Check your vehicle’s repair manual for exact specifications and fit.