🔧 MX-5 Miata - Shock Absorber Replacement

On your MX-5 Miata, the shocks are part of a coilover assembly (shock + spring). Replacing them restores ride control and can fix bouncing, clunking, or uneven tire wear. Plan for careful spring handling and an alignment afterward.

Difficulty Level: Advanced | Estimated Time: 4-8 hours

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⚠️ Safety & Precautions

• ⚠️ Coil springs are stored energy—use a quality spring compressor and keep hands/face out of the spring’s path.
• ⚠️ Support the car on jack stands at the pinch welds; never rely on a floor jack alone.
• ⚠️ Work on one corner at a time and keep the opposite wheels chocked.
• ⚠️ If you separate the spring from the shock, mark top-hat orientation before disassembly.
• ⚠️ Battery disconnect is not required for this repair.

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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
• Breaker bar 1/2"
• Torque wrench 3/8" (10–80 Nm range)
• Torque wrench 1/2" (40–200 Nm range)
• Socket set 8–21mm (3/8" and 1/2" drive)
• Wrench set 10–21mm
• Allen key set (metric)
• Pry bar 18"
• Needle-nose pliers
• Trim clip tool
• Spring compressor (external, threaded-rod type) (specialty)
• Penetrating oil
• Paint marker
• Safety glasses
• Mechanic gloves

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front shock absorber/strut (coilover shock) - Replace in pairs - Qty: 2
• Rear shock absorber (coilover shock) - Replace in pairs - Qty: 2
• Front upper strut mount/bearing (optional but recommended if noisy) - Qty: 2
• Rear upper shock mount (optional but recommended if cracked/noisy) - Qty: 2
• New self-locking nuts/bolts for shock mounts (recommended) - Qty: 1 set

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📋 Before You Begin

• Park on level ground, set the parking brake, and place wheel chocks at the wheels staying on the ground.
• Crack the lug nuts loose with a breaker bar before lifting the car.
• Spray penetrating oil on the lower shock bolts and sway bar end link nuts 10–15 minutes before removal.
• If you’ll reuse springs/top mounts: prepare your spring compressor (it clamps the spring so it can’t expand).

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and secure the car

• Use a 21mm socket and breaker bar to loosen lug nuts 1/2 turn.
• Lift the front (or rear) with a floor jack and set it on jack stands.
• Remove the wheels using a 21mm socket.
• When reinstalling wheels later: Torque to 108 Nm (80 ft-lbs).

Step 2: (Front) Disconnect items attached to the front shock

• Support the lower control arm with the floor jack so the suspension doesn’t drop suddenly.
• Remove the sway bar end link nut from the shock bracket using a wrench set and Allen key set to hold the stud if it spins.
• Reinstall spec: Torque to 52 Nm (38 ft-lbs).
• Remove any brake hose/ABS wire brackets from the shock using a 10mm socket.
• Reinstall spec: Torque to 10 Nm (89 in-lbs).
• Tip: Take a quick photo of routing.

Step 3: (Front) Remove the front shock assembly

• At the lower mount, remove the shock-to-lower-arm bolt/nut using a 17mm socket and 17mm wrench.
• Reinstall spec: Torque to 98 Nm (72 ft-lbs).
• Open the hood and locate the top shock mount nuts.
• Remove the top mount nuts using a 14mm socket while holding the assembly from below.
• Reinstall spec: Torque to 39 Nm (29 ft-lbs).
• Remove the shock assembly from the wheel well.

Step 4: (Rear) Access the rear upper shock mounts

• Open the trunk and remove the necessary trim panels using a trim clip tool and 10mm socket.
• Locate the rear upper shock mount nuts.
• Tip: Keep clips in a small container.

Step 5: (Rear) Remove the rear shock assembly

• Support the rear lower control arm with the floor jack.
• Remove the lower shock bolt using a 17mm socket and 17mm wrench.
• Reinstall spec: Torque to 98 Nm (72 ft-lbs).
• From inside the trunk, remove the upper mount nuts using a 14mm socket.
• Reinstall spec: Torque to 28 Nm (21 ft-lbs).
• Remove the shock assembly from the wheel well.

Step 6: Swap springs onto the new shocks (only if not using complete pre-assembled units)

• Install the spring compressor (specialty) on opposite sides of the spring and tighten evenly using a wrench set until the spring is loose in the top hat.
• Mark top-hat orientation with a paint marker so it goes back the same way.
• Remove the center shaft nut using a socket set 8–21mm and Allen key set to hold the shaft if needed.
• Transfer the spring, isolators, and top mount to the new shock.
• Install the center nut and tighten with a torque wrench to 44 Nm (32 ft-lbs).
• Slowly loosen the spring compressor using a wrench set until the spring seats fully.
• Tip: If anything looks crooked, recompress and reseat.

Step 7: Reinstall the new shock assemblies

• Position the assembly and start the upper nuts by hand using a 14mm socket (do not fully tighten yet).
• Align the lower mount and install the lower bolt using a 17mm socket and 17mm wrench.
• Tighten all fasteners to their listed torque specs using a torque wrench.
• Reattach sway bar end links and any brackets using the correct socket set and wrench set, then torque them.

Step 8: Reinstall wheels and lower the car

• Install wheels and snug lug nuts using a 21mm socket.
• Lower the car off jack stands using a floor jack.
• Final-tighten lug nuts with a torque wrench: Torque to 108 Nm (80 ft-lbs).

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✅ After Repair

• Test drive at low speed first; listen for clunks and confirm straight tracking.
• Get a 4-wheel alignment as soon as possible (recommended anytime shocks/coilovers are removed).
• Recheck lug nut torque after 25–50 miles using a torque wrench: Torque to 108 Nm (80 ft-lbs).
• If you installed new shocks with reused mounts, expect minor settling after a few drives.

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💰 DIY vs Shop Cost

Shop Cost: $1,200-$2,200 (parts + labor)

DIY Cost: $450-$1,400 (parts only)

You Save: $750-$800 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 4-6 hours.

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🎯 Ready to get started?

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