🔧 Wheel Bearing - Hub Assembly Replacement

The XC90 uses a hub-and-bearing assembly at each wheel, so the bearing is replaced as a complete unit rather than pressed out separately. This job involves removing the brake parts, axle nut, and hub fasteners, then installing the new assembly and torquing everything to Volvo specification.

Difficulty Level: Advanced | Estimated Time: 2-4 hours per wheel

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⚠️ Safety & Precautions

• Work on a flat surface and support the vehicle with jack stands before removing the wheel.
• Use wheel chocks on the opposite wheels.
• Do not let the brake caliper hang by the hose.
• The axle nut is very tight; use the correct socket and a breaker bar.
• If your XC90 has an electronic parking brake, put it in service mode before rear brake work.
• Disconnect the battery only if a scan tool or service procedure requires it.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands
• Wheel chocks
• Lug wrench or 19mm socket
• Breaker bar
• Torque wrench
• Metric socket set
• Torx bit set
• Ratchet
• Flat screwdriver
• Bungee cord
• Hammer
• Brake cleaner
• Safety glasses
• Mechanic gloves

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Wheel hub and bearing assembly - Qty: 1 per wheel
• New axle nut - Qty: 1
• New hub mounting bolts - Qty: 3-4, if required by Volvo for your axle
• Brake cleaner - Qty: 1 can

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📋 Before You Begin

• Park on level ground, set the parking brake, and chock the wheels.
• Loosen the lug bolts before lifting the vehicle.
• If you are replacing a rear bearing and the parking brake must be retracted, use the service function in the brake menu before starting.
• Keep the wheel speed sensor wiring safe during removal.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise and secure the vehicle

• Use the floor jack to lift the corner you are servicing.
• Support it with jack stands under proper lift points.
• Remove the wheel using the lug wrench or 19mm socket.

Step 2: Remove the brake caliper and rotor

• Use the Torx bit set or metric socket set to remove the caliper bolts.
• Hang the caliper with a bungee cord.
• Remove the rotor. If it is stuck, tap it lightly with a hammer.

Step 3: Remove the axle nut

• Use the correct metric socket and a breaker bar to loosen the axle nut.
• Remove and discard the old axle nut.
• Torque to Volvo specification on reassembly.

Step 4: Disconnect the hub assembly

• Use the Torx bit set or metric socket set to remove the hub mounting bolts from the back side of the knuckle.
• Disconnect the wheel speed sensor wiring if it is clipped to the hub.
• Tap the hub assembly out with a hammer if it is seized.
• Penetrating oil helps with rust.

Step 5: Clean the mounting surface

• Use brake cleaner and a rag to clean the knuckle mounting surface.
• Remove rust and debris so the new hub sits flat.

Step 6: Install the new hub and bearing assembly

• Position the new wheel hub and bearing assembly in the knuckle.
• Install the hub bolts by hand first.
• Use the torque wrench to tighten the hub bolts to Volvo specification.

Step 7: Reinstall the axle nut and brake parts

• Install a new axle nut by hand.
• Use the torque wrench to tighten it to Volvo specification.
• Reinstall the rotor, caliper, and caliper bolts using the Torx bit set or metric socket set.
• Do not pinch the brake hose.

Step 8: Reinstall the wheel and lower the vehicle

• Install the wheel and hand-tighten the lug bolts.
• Lower the vehicle with the floor jack.
• Tighten the lug bolts with the torque wrench to Volvo specification.

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✅ After Repair

• Spin the wheel by hand and listen for noise or rubbing.
• Start the vehicle and confirm there are no warning lights.
• Road test at low speed first, then listen for humming or grinding.
• If the ABS or stability light stays on, scan for wheel speed sensor faults.

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💰 DIY vs Shop Cost

Shop Cost: $450-$900 per wheel (parts + labor)

DIY Cost: $120-$300 per wheel (parts only)

You Save: $330-$600 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2-4 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.