🔧 Front Strut Assembly - Replacement

Assumption: This guide is for the front struts on your XC90. On this model, the front strut is part of the MacPherson strut suspension and the spring must be compressed before disassembly.

Replacing the front struts restores ride control, reduces bouncing, and can fix clunks or poor steering feel. This is a more advanced job because the coil spring is under heavy load and the suspension must be separated at the knuckle.

Difficulty Level: Advanced | Estimated Time: 3-5 hours

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⚠️ Safety & Precautions

• The coil spring is under high tension. Use a proper spring compressor only.
• Support the vehicle with jack stands before removing the wheels.
• Do not work under a vehicle supported only by a jack.
• If equipped with electronically controlled suspension wiring at the strut, disconnect the connector before removal.
• Keep hands clear of the spring compressor jaws while compressing or releasing the spring.

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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
• Breaker bar
• Torque wrench
• Socket set metric
• Combination wrench set metric
• Hex bit set metric
• Torx bit set
• Spring compressor (specialty)
• Ball joint separator (specialty)
• Pry bar
• Penetrating oil
• Gloves
• Safety glasses
• Paint marker

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front strut assembly - Replace in pairs - Qty: 2
• Front strut mount - Replace in pairs - Qty: 2
• Front strut bearing - Replace in pairs - Qty: 2
• Front coil spring - Replace in pairs if worn or damaged - Qty: 2
• Front strut mount hardware kit - Qty: 1

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📋 Before You Begin

• Park on level ground, set the parking brake, and chock the rear wheels.
• Loosen the front wheel lug bolts before lifting.
• If the strut has an electrical connector, disconnect the battery before unplugging it.
• Mark the position of any brackets or brake hose clips before removal.
• Replace struts in pairs for even handling.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise and support the vehicle

• Use the floor jack to lift the front of the vehicle.
• Place jack stands under the proper support points and lower the vehicle onto them.
• Remove the front wheel using the socket set metric.

Step 2: Disconnect attached components

• Use the socket set metric and Torx bit set to remove the brake hose bracket and any sensor wire brackets from the strut.
• If equipped, unplug the strut wiring connector.
• Move the ABS wire and brake hose aside carefully.

Step 3: Separate the strut from the steering knuckle

• Spray the lower fasteners with penetrating oil.
• Use the socket set metric and breaker bar to remove the lower strut-to-knuckle bolts.
• Use a ball joint separator (specialty) or pry bar if the knuckle needs gentle movement to free the strut.

Step 4: Remove the upper strut mounting nuts

• Open the hood and locate the upper strut tower mount.
• Use the socket set metric or combination wrench set metric to remove the upper mount nuts.
• Support the strut from below while removing the last fastener.

Step 5: Remove the strut assembly

• Lower the strut assembly out of the wheel well.
• Note the orientation of the top mount and spring ends before disassembly.

Step 6: Disassemble the strut

• Install the strut and spring into the spring compressor (specialty).
• Compress the spring evenly until it is loose on the perch.
• Use the socket set metric and hex bit set metric to remove the top shaft nut.
• Remove the mount, bearing, spring, and dust components in order.
• Keep the spring ends indexed the same way.

Step 7: Assemble the new strut

• Transfer the spring and hardware to the new strut in the same orientation.
• Install the new mount and bearing.
• Use the torque wrench to tighten the top shaft nut to manufacturer specification.
• Slowly release the spring compressor (specialty) and confirm the spring seats correctly.

Step 8: Reinstall the strut assembly

• Position the assembly in the strut tower and start the upper nuts by hand.
• Align the lower end with the steering knuckle.
• Install the lower bolts using the socket set metric.
• Torque all strut-to-knuckle and upper mount fasteners to manufacturer specification.

Step 9: Reattach all brackets and wiring

• Reinstall the brake hose bracket and sensor wire brackets using the socket set metric or Torx bit set.
• Reconnect any electrical connectors.
• Make sure the hose and wiring are routed exactly as before.

Step 10: Reinstall the wheel and lower the vehicle

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

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✅ After Repair

• Start the vehicle and listen for clunks or rubbing.
• Turn the steering wheel lock-to-lock and confirm there is no hose or wire interference.
• Check ride height and confirm both sides sit evenly.
• Schedule a wheel alignment after strut replacement.
• Alignment is required anytime struts are removed.

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💰 DIY vs Shop Cost

Shop Cost: $900-$1,600 (parts + labor)

DIY Cost: $350-$800 (parts only)

You Save: $550-$800 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 3-5 hours.

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🎯 Ready to get started?

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