my Toyota Highlander Fourth Generation (2020-present) feels bumpy when driving what is wrong

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Wear safety glasses and gloves.

2. Tire Inspection and Replacement

• Sub-steps:
  1. Remove the wheel covers or hubcaps if applicable.
  2. Loosen the lug nuts using a socket wrench.
  3. Lift the vehicle using a jack and secure it with jack stands.
  4. Remove the wheel and inspect the tire for bulges, tears, or uneven wear.
  5. Replace any damaged tires with new tires of the same specifications (size, load rating, speed rating).

3. Suspension Component Replacement

• Sub-steps:
  1. Identify and mark the location of the struts/shocks to be replaced.
  2. Remove the lower mounting bolts using a socket wrench.
  3. Remove the upper mounting bolts from the strut assembly.
  4. Carefully detach and replace the strut/shock with a new unit, ensuring it is oriented correctly.
  5. Torque all bolts to manufacturer specifications (usually around 30-40 ft-lbs for upper bolts, check specific manual for details).
  6. Reinstall the wheel and lower the vehicle.

4. Wheel Alignment

• Sub-steps:
  1. After replacing tires and suspension components, take the vehicle to a professional alignment shop.
  2. Ensure the alignment is adjusted to the manufacturer’s specifications.
  3. Verify the caster, camber, and toe settings are within the acceptable range.