2021 Toyota Highlander Shocks Replacement: Tools, Steps, and What To Check First

Quick Answer

To replace shocks on a 2021 Toyota Highlander, follow these core steps:

Secure the vehicle with wheel chocks, jack it up, and support with rated jack stands.
Remove the wheel, then disconnect the upper and lower shock mounts (front mounts are accessible under the hood; rear upper mounts may require trim panel removal).
Install matched replacement shocks (verify fitment for FWD/AWD trims) and torque bolts to factory specs:
- Front: Upper mount 37 ft-lbs, lower mount 103 ft-lbs
- Rear: Upper mount 37 ft-lbs, lower mount 145 ft-lbs Always confirm torque specs with your vehicle’s official service manual.
Reinstall the wheel and schedule a wheel alignment post-replacement. Total time: 2–3 hours for front/rear pair; 4–5 hours for a full set.

First, confirm your shocks need replacement by checking for these symptoms:

Additional prep:

Secure the vehicle: Place wheel chocks on the rear wheels. Jack up the front of the Highlander and position jack stands under the frame rails (not the control arms). Lower the vehicle onto the stands.
Remove the front wheel: Loosen lug nuts, then fully remove the wheel and set it aside.
Treat rusted bolts: Spray penetrating oil on the upper shock mount nuts (under the hood, near the strut tower) and lower shock mount bolt/nut (on the control arm). Let sit for 5–10 minutes.
Disconnect lower mount: Use a socket and breaker bar to remove the lower shock bolt and nut. Pull the shock free from the control arm.
Access upper mount: Open the hood and locate the upper shock mount (three 14mm nuts holding the shock to the strut tower).
Remove upper mount: Unscrew the three nuts and the center bolt. Pull the old shock out of the engine bay.
Install new shock: Insert the lower end of the new shock into the control arm. Hand-tighten the bolt and nut. Align the upper mount with the strut tower, then hand-tighten the three nuts and center bolt.
Torque to specs: Use a torque wrench to tighten the upper mount to 37 ft-lbs and the lower mount to 103 ft-lbs (confirm with service manual).
Reinstall wheel: Put the wheel back on, torque lug nuts to 100 ft-lbs, and repeat the process on the opposite front side.

Secure the vehicle: Place wheel chocks on the front wheels. Jack up the rear and position jack stands under the frame rails. Lower the vehicle onto the stands.
Remove the rear wheel: Loosen lug nuts, then fully remove the wheel.
Treat rusted bolts: Spray penetrating oil on the lower shock mount bolt/nut (on the axle bracket) and upper shock mount nut (inside the cargo area or behind the rear seat).
Disconnect lower mount: Remove the lower bolt and nut using a socket and breaker bar. Pull the shock free from the axle.
Access upper mount: For most trims, remove the rear seat bottom or cargo side trim panel to reach the upper shock mount (14mm nut and bolt).
Remove upper mount: Unscrew the nut and bolt, then pull the old shock out of the vehicle.
Install new shock: Insert the lower end into the axle bracket, hand-tighten the bolt and nut. Align the upper mount, hand-tighten the nut and bolt.
Torque to specs: Tighten the upper mount to 37 ft-lbs and the lower mount to 145 ft-lbs (confirm with service manual).
Reinstall wheel: Put the wheel back on, torque lug nuts to 100 ft-lbs, and repeat on the opposite rear side.

Skipping wheel alignment: Shock replacement can alter suspension geometry, leading to uneven tire wear and poor handling. Always schedule an alignment within 72 hours of installation.
Reusing old lock nuts: Lock nuts are designed for one-time use; reusing them can lead to loose mounts and safety risks.
Over-torquing bolts: Incorrect torque can damage shock mounts or frame components. Always use a calibrated torque wrench.
Ignoring rusted bolts: Forcing stuck bolts can break them, requiring costly repairs. Let penetrating oil sit longer or use a heat gun (carefully) to loosen rust.
Mismatching FWD/AWD shocks: Using the wrong shock type will cause fitment issues and reduced performance. Double-check part numbers against your trim.

Trim-specific fitment: AWD models have slightly longer front shocks than FWD models. Always confirm part compatibility with your vehicle’s VIN or trim level.
Aftermarket considerations: Adjustable shocks (e.g., Bilstein B8) are available for off-road or performance-focused drivers, but ensure they’re calibrated for the 2021 Highlander’s weight and suspension setup.
Pre-replacement inspection: While replacing shocks, check for worn control arms, bushings, or sway bar links. Damaged components can negate the benefits of new shocks.

Never work under a vehicle supported only by a jack. Always use rated jack stands.
Wear safety glasses to protect against flying debris when loosening rusted bolts.
Disconnect the negative battery terminal if working near electrical components (e.g., ABS sensors on some models).
Keep hands and tools clear of moving parts when testing suspension after replacement.

If you encounter severely rusted bolts that won’t loosen (risk of breaking them).
If you notice damaged suspension components (e.g., bent control arms) during disassembly.
If you don’t have access to a calibrated torque wrench (incorrect torque can lead to shock failure).
If you’re unsure how to remove trim panels or access hard-to-reach mounts.
If post-replacement handling feels abnormal (e.g., pulling to one side) and you can’t diagnose the issue.