what causes my Toyota RAV4 to vibrate at highway speeds

Solution

1. Tire Inspection and Pressure Adjustment

1.1. Check each tire's pressure using a tire pressure gauge and adjust to manufacturer specifications.
1.2. Inspect tires for uneven wear, bulges, or punctures.
1.3. Rotate or replace tires as necessary based on condition.

2. Wheel Balancing

2.1. Remove the wheel and tire assembly from the vehicle.
2.2. Use a wheel balancing machine to check for imbalance.
2.3. Add wheel weights as needed to achieve balance.
2.4. Reinstall the wheel and torque the lug nuts to the manufacturer's specifications (typically 76-90 ft-lbs for RAV4).

3. Suspension Component Inspection

3.1. Raise the vehicle using a jack and secure it with jack stands.
3.2. Inspect struts, shocks, and bushings for signs of wear or damage.
3.3. Replace any worn or damaged suspension components.
3.4. Ensure all bolts are torqued to the manufacturer's specifications.

4. Test Drive

4.1. Lower the vehicle and perform a test drive to confirm that vibrations have been resolved.
4.2. Monitor for any remaining symptoms during various driving conditions.