🔧 CX-30 - Strut Replacement

On your CX-30, the “struts” people usually mean the front strut assemblies (shock + coil spring + top mount). Replacing them restores ride control and stops bouncing, clunking, and uneven tire wear. After front strut work, you should plan on a wheel alignment.

Difficulty Level: Advanced | Estimated Time: 3-6 hours

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⚠️ Safety & Precautions

• ⚠️ Use jack stands—never rely on a floor jack alone.
• ⚠️ If you are not using “quick-struts,” a spring compressor is required; compressed springs can cause serious injury.
• ⚠️ Keep the ignition OFF and don’t unplug yellow connectors (airbag/SRS related).
• ⚠️ After reassembly, drive carefully until you confirm steering/braking feel is normal.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Breaker bar 1/2"
• Torque wrench 3/8" (10–100 Nm range)
• Torque wrench 1/2" (40–200 Nm range)
• Socket set 10mm–21mm (3/8" and 1/2")
• Wrench set 10mm–21mm
• Allen key set (metric)
• Pry bar
• Needle-nose pliers
• Flat trim tool
• Paint marker
• Penetrating oil
• Spring compressor (specialty)
• Safety glasses
• Mechanic gloves

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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/top hat - If not included with assemblies - Qty: 2
• Front bump stop and dust boot kit - If not included - Qty: 2
• Front sway bar end link - Optional if worn/clunking - Qty: 2
• Strut-to-knuckle bolts and nuts - Recommended one-time-use hardware - Qty: 4

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📋 Before You Begin

• Park on level ground, steering straight, and set the parking brake.
• Chock the rear wheels before lifting the front.
• Spray penetrating oil on the strut-to-knuckle bolts and sway bar link nut 10–15 minutes before removal.
• “Quick-struts” = pre-assembled strut + spring.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and remove the front wheels

• Use a breaker bar and 21mm socket to loosen the lug nuts 1/2 turn.
• Use a floor jack to lift the front and support with jack stands at the proper lift points.
• Remove lug nuts with a 21mm socket and remove both front wheels.
• During reinstall: Torque wheel lug nuts to 108 Nm (80 ft-lbs).

Step 2: Unbolt brackets and the sway bar end link

• Use a 10mm socket to remove the ABS wire/bracket fasteners from the strut (if equipped on the strut body).
• Use a 12mm socket to remove the brake hose bracket bolt from the strut.
• Use a 17mm socket (and hold the stud with the correct Allen key if it spins) to remove the sway bar end link nut from the strut.
• Reinstall torque: Torque sway bar end link nut to 65 Nm (48 ft-lbs).
• Reinstall torque: Torque brake hose bracket bolt to 22 Nm (16 ft-lbs).

Step 3: Mark and remove the strut-to-knuckle bolts

• Use a paint marker to mark the relationship of the strut to the knuckle (helps keep alignment close).
• Support the knuckle/hub so it doesn’t pull on the axle/CV joint (use a floor jack lightly under the lower control arm or knuckle).
• Use a breaker bar with 21mm socket and a matching 21mm wrench to remove the two strut-to-knuckle bolts/nuts.
• Reinstall torque: Torque strut-to-knuckle bolts to 112 Nm (83 ft-lbs).

Step 4: Remove the strut top nuts and take the strut out

• Open the hood and locate the strut tower top mount.
• Use a 14mm socket to remove the strut top mount nuts.
• Hold the strut with one hand as you remove the last nut, then guide the strut out of the wheel well.
• Reinstall torque: Torque strut top mount nuts to 44 Nm (32 ft-lbs).

Step 5: If NOT using quick-struts, swap the spring to the new strut

• Install a spring compressor (specialty) on opposite sides of the spring and tighten evenly until the spring is loose in the seats.
• Use the correct socket and Allen key (to hold the shaft) to remove the strut shaft nut.
• Transfer the top mount, bearing/isolator, dust boot, and bump stop to the new strut in the same order.
• Tighten the shaft nut with a torque wrench: Torque strut shaft nut to 60 Nm (44 ft-lbs).
• Slowly release the spring compressor, making sure the spring ends seat correctly.

Step 6: Install the strut back into the car

• Guide the strut into the tower and start the top nuts by hand (use a 14mm socket to snug later).
• Line up the strut to the knuckle and install the two strut-to-knuckle bolts (use a pry bar if needed to align).
• Use a torque wrench to finish tightening: Torque strut-to-knuckle bolts to 112 Nm (83 ft-lbs).
• Use a torque wrench to finish tightening: Torque strut top mount nuts to 44 Nm (32 ft-lbs).

Step 7: Reattach brackets and the end link

• Use a 12mm socket to reinstall the brake hose bracket bolt: Torque to 22 Nm (16 ft-lbs).
• Use a 10mm socket to reinstall any ABS wire/bracket fasteners you removed.
• Use a 17mm socket to reinstall the sway bar end link nut (hold stud with Allen key if needed): Torque to 65 Nm (48 ft-lbs).

Step 8: Reinstall wheels and lower the car

• Install wheels and hand-thread lug nuts.
• Lower the car using the floor jack.
• Use a torque wrench and 21mm socket: Torque wheel lug nuts to 108 Nm (80 ft-lbs).

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✅ After Repair

• Road test at low speed first; listen for clunks and confirm the steering wheel returns to center.
• Recheck all visible fasteners and brackets after the first short drive.
• Get a 4-wheel alignment as soon as possible (front strut removal can change camber/toe).
• Replace struts in pairs for balanced handling.

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💰 DIY vs Shop Cost

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

DIY Cost: $300-$900 (parts only)

You Save: $600-$700 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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