🔧 Focus - Shock Absorber Replacement

This guide covers replacing the rear shock absorbers on your Focus. The rear shocks control bounce and help keep the tires planted; worn shocks can cause clunking, poor ride control, uneven tire wear, and longer stopping distance.

Difficulty Level: Beginner | Estimated Time: 1-2 hours

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⚠️ Safety & Precautions

• ⚠️ Never work under your Focus supported only by a jack. Always use jack stands.
• ⚠️ Replace rear shock absorbers in pairs so both sides ride and handle evenly.
• ⚠️ Chock the front wheels so the car cannot roll while the rear is lifted.
• ⚠️ Do not remove rear suspension arms or springs for this job. The rear coil spring is under tension.
• ⚠️ Battery disconnect is not required for rear shock absorber replacement.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 2-ton minimum)
• Jack stands (rated 2-ton minimum)
• Wheel chocks
• 19mm lug nut socket
• Ratchet wrench 3/8-inch drive
• Breaker bar 1/2-inch drive
• 15mm socket
• 18mm socket
• 15mm box-end wrench
• 18mm box-end wrench
• Torque wrench 1/2-inch drive
• Penetrating oil spray
• Wire brush
• Rubber mallet
• Small pry bar
• Safety glasses
• Mechanic gloves

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear shock absorbers - Qty: 2
• Rear shock upper mounting nuts - Qty: 4
• Rear shock lower mounting bolts - Qty: 2
• Rear shock lower mounting nuts - Qty: 2

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📋 Before You Begin

• 🚗 Park your Focus on a flat, solid surface.
• 🅿️ Leave the transmission in 1st gear and fully apply the parking brake before loosening the lug nuts.
• 🧱 Place wheel chocks in front of and behind the front wheels.
• 🔧 A jack stand is a fixed support stand that safely holds the vehicle after lifting it with a floor jack.
• 🔧 A torque wrench is a tool that tightens bolts to the correct tightness so they are not too loose or too tight.
• 💡 Spray penetrating oil on the rear shock mounting hardware 10-15 minutes before removal.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Loosen the Rear Wheel Lug Nuts

• Use the 19mm lug nut socket and breaker bar 1/2-inch drive to loosen each rear wheel lug nut about half a turn.
• Do not remove the lug nuts yet.
• Loosen wheels before lifting.

Step 2: Lift and Support the Rear of the Vehicle

• Use the floor jack to lift the rear of your Focus at the rear center jacking area or approved rear lift point.
• Place jack stands under the approved rear side support points.
• Slowly lower the car onto the jack stands.
• Gently shake the vehicle by hand to confirm it is stable before working near the suspension.

Step 3: Remove the Rear Wheels

• Use the 19mm lug nut socket and ratchet wrench 3/8-inch drive to remove the loosened lug nuts.
• Remove both rear wheels and set them flat on the ground.
• Slide one wheel under the side of the car as an extra safety backup.

Step 4: Clean the Shock Mounting Hardware

• Use the wire brush to clean dirt and rust from the upper and lower shock absorber fasteners.
• Spray the upper nuts and lower bolt/nut with penetrating oil spray.
• Wait a few minutes so the oil can work into the threads.

Step 5: Support the Rear Suspension Arm

• Place the floor jack lightly under the rear suspension arm near the lower shock mount.
• Raise the jack just enough to support the arm. Do not lift the car off the jack stand.
• This keeps the suspension from dropping suddenly when the shock is removed.

Step 6: Remove the Lower Shock Bolt

• Use the 18mm socket and ratchet wrench 3/8-inch drive on the lower shock bolt.
• Use the 18mm box-end wrench to hold the nut if it spins.
• Remove the lower bolt and nut.
• If the bolt is snug, tap it gently with the rubber mallet.
• Do not hammer threaded ends hard.

Step 7: Remove the Upper Shock Mount Nuts

• Use the 15mm socket and ratchet wrench 3/8-inch drive to remove the upper shock mounting nuts.
• Use the 15mm box-end wrench if access is tight.
• Hold the shock with one hand while removing the last upper nut so it does not fall.

Step 8: Remove the Old Shock Absorber

• Pull the shock absorber out by hand.
• If it sticks in the lower mount, use the small pry bar gently to free it.
• Compare the old and new shock absorbers side by side to confirm the length and mounting points match.

Step 9: Install the New Shock Absorber

• Position the new shock absorber into the upper mount by hand.
• Install the new upper mounting nuts finger-tight first.
• Line up the lower shock eye with the lower mount using the floor jack to slightly raise or lower the suspension arm.
• Install the new lower bolt and nut finger-tight.
• Start bolts by hand first.

Step 10: Tighten the Shock Fasteners

• Use the 15mm socket and torque wrench 1/2-inch drive to tighten the upper shock mounting nuts to Torque to 25 Nm (18 ft-lbs).
• Use the 18mm socket, 18mm box-end wrench, and torque wrench 1/2-inch drive to tighten the lower shock bolt/nut to Torque to 115 Nm (85 ft-lbs).
• If possible, final-tighten the lower shock bolt with the suspension close to normal ride height by lightly supporting the arm with the floor jack.

Step 11: Repeat on the Other Side

• Move the floor jack to support the opposite rear suspension arm.
• Repeat Steps 4 through 10 using the same 15mm socket, 18mm socket, box-end wrenches, and torque wrench 1/2-inch drive.
• Always replace both rear shock absorbers during the same repair.

Step 12: Reinstall the Rear Wheels

• Place each wheel back on the hub by hand.
• Install the lug nuts by hand to avoid cross-threading.
• Use the 19mm lug nut socket and ratchet wrench 3/8-inch drive to snug the lug nuts in a star pattern.

Step 13: Lower the Vehicle and Torque the Lug Nuts

• Use the floor jack to raise the rear slightly off the jack stands.
• Remove the jack stands.
• Lower your Focus fully to the ground.
• Use the 19mm lug nut socket and torque wrench 1/2-inch drive to tighten the rear lug nuts in a star pattern to Torque to 135 Nm (100 ft-lbs).

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✅ After Repair

• ✅ Bounce each rear corner of your Focus by hand. The body should settle quickly without repeated bouncing.
• ✅ Take a slow test drive on a quiet road and listen for clunks or rattles.
• ✅ Recheck that the rear shocks are seated correctly and that no hardware is loose.
• ✅ After 25-50 miles, recheck rear lug nut torque with the 19mm lug nut socket and torque wrench 1/2-inch drive to 135 Nm (100 ft-lbs).
• ✅ A wheel alignment is usually not required for rear shock absorber replacement unless other suspension parts were loosened or tire wear is already uneven.

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💰 DIY vs Shop Cost

Shop Cost: $300-$550 (parts + labor)

DIY Cost: $90-$220 (parts only)

You Save: $210-$330 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1-2 hours.

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