what causes my Volvo XC90 to shake when I'm braking

Volvo XC90 Second Generation (2015-2024)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

580 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix shaking during braking in Volvo XC90. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Brakes

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always disconnect the battery before working on electrical systems.
•Ensure the vehicle is securely lifted and supported before working underneath.

Symptoms

•Steering wheel vibrations when applying brakes
•Vehicle shakes or pulsates during braking
•Increased stopping distance
•Brake pedal feel rough or pulsating
•Possible noise from brakes (squeaking or grinding)
•Uneven tire wear

Diagnostic Steps

1
Inspect brake rotors for warping or thickness variation using a dial indicator.
2
Check brake pads for uneven wear or damage.
3
Examine suspension components (control arms, bushings, and tie rods) for wear or damage.
4
Inspect wheel bearings for play or noise.
5
Test the alignment and balance of the wheels.
6
Scan for any brake system error codes using an OBD-II scanner.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Lug wrench
•Jack and jack stands
•Torque wrench
•Dial indicator

Parts Required

•New brake rotors
•New brake pads
•Wheel bearings (if necessary)

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Diagnostic Steps

1
Inspect brake rotors for warping or thickness variation using a dial indicator.
2
Check brake pads for uneven wear or damage.
3
Examine suspension components (control arms, bushings, and tie rods) for wear or damage.
4
Inspect wheel bearings for play or noise.
5
Test the alignment and balance of the wheels.
6
Scan for any brake system error codes using an OBD-II scanner.

Solution

1. Preparation

Gather necessary tools and parts before starting.
Ensure the vehicle is parked on a level surface and the parking brake is engaged.
Wear safety gloves and goggles.

2. Inspect and Replace Brake Rotors

Lift Vehicle: Use a jack to lift the vehicle and secure it with jack stands.
Remove Wheel: Use a lug wrench to remove the wheel where the shaking occurs.
Inspect Rotors: Check the brake rotor for warping or uneven surfaces. Use a dial indicator for precise measurement.
Replace Rotors (if necessary):
- Remove caliper bolts with a socket set and take off the caliper.
- Hang the caliper aside with a wire to avoid stress on the brake line.
- Remove the rotor by unscrewing the retaining screws (if applicable) and sliding it off the hub.
- Install new rotors, ensuring they are properly seated.
- Reattach the caliper and torque bolts to manufacturer specifications (typically around 20-25 ft-lbs).

3. Inspect and Replace Brake Pads

Remove Old Pads: After removing the caliper, slide the old brake pads out from their brackets.
Inspect Pads: Check for uneven wear or thickness. Replace if they are below the minimum thickness (usually around 3mm).
Install New Pads: Apply brake grease to the back of the new pads and install them in the caliper bracket.

4. Check Suspension Components

Visual Inspection: Examine control arms, bushings, and tie rods for any visible signs of damage or wear.
Check Wheel Bearings: Grab the wheel at 12 and 6 o'clock and check for excessive play; if present, replace the wheel bearing.

5. Alignment and Balancing

Alignment Check: After replacing components, take the vehicle to an alignment shop to ensure proper alignment.
Balance Wheels: Ensure all wheels are balanced after reinstallation.