why does my Volvo XC90 vibrate when braking at high speeds

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the parking brake is engaged.
• Disconnect the battery if necessary for safety.

2. Inspect and Replace Brake Components

a. Inspect Brake Pads and Rotors

• Remove the wheel using a socket set.
• Inspect brake pads for thickness; replace if below 3mm.
• Examine rotors for grooves or scoring; replace if damaged.

b. Resurface or Replace Rotors

• If rotors are warped, either resurface them using a lathe according to manufacturer specifications or replace them with new rotors.
• Ensure rotor mounting surfaces are clean before installation.

c. Reassemble Brakes

• Reinstall brake pads and ensure they are seated properly.
• Torque brake caliper mounting bolts to manufacturer specifications (typically around 25-35 ft-lbs).

3. Wheel Alignment and Balancing

• Check wheel alignment using an alignment tool; adjust as necessary.
• Balance the wheels using a wheel balancer if uneven wear or vibration is noted.

4. Final Assembly

• Reinstall the wheel and torque lug nuts to manufacturer specifications (typically around 80-100 ft-lbs).
• Reconnect the battery if it was disconnected.