🔧 Q50 - Shock Absorber Replacement

On your Q50, the rear uses separate shock absorbers, but the front uses strut assemblies (a strut is a shock + spring unit). Replacing worn shocks/struts restores ride control, reduces bouncing, and helps tire wear.

Difficulty Level: Advanced | Estimated Time: 4-7 hours

Assumption: replacing all four (front struts + rear shocks) with stock-style parts.

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⚠️ Safety & Precautions

• ⚠️ Support the car with jack stands—never rely on a floor jack.
• ⚠️ Springs store serious energy—use a coil spring compressor correctly, or buy complete quick-struts to avoid spring transfer.
• ⚠️ Keep hands clear of pinch points when lowering/raising the suspension.
• ⚠️ After front strut work, get a 4-wheel alignment as soon as possible.
• 🔋 Battery disconnect is not required for this job.

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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
• Safety glasses
• Mechanic gloves
• Breaker bar (1/2")
• Torque wrench (20–200 ft-lbs)
• Socket set (8mm–22mm, 1/2" drive)
• Wrench set (10mm–22mm)
• Deep socket set (10mm–19mm)
• Ratchet (3/8")
• Ratchet (1/2")
• Pry bar (18")
• Needle-nose pliers
• Trim clip removal tool
• Allen key set (metric)
• Penetrating oil
• Paint marker
• Coil spring compressor (specialty)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front strut assemblies (complete/quick-strut recommended) - Qty: 2
• Rear shock absorbers - Qty: 2
• Front strut mount/bearing kit - Qty: 2
• Front bump stops and dust boots - Qty: 2
• Rear shock upper mounts/isolators - Qty: 2
• Rear bump stops and dust boots - Qty: 2
• New self-locking nuts/bolts (strut/shock hardware kit) - Qty: 1

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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.
• Loosen lug nuts slightly using a 21mm socket and breaker bar before lifting.
• Spray key fasteners with penetrating oil (strut-to-knuckle bolts, sway bar link nuts, rear lower shock bolt) and wait 5–10 minutes.
• If transferring springs, inspect the spring seats and mounts; replace any cracked rubber.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and secure the front

• Use a floor jack (rated 3-ton minimum) to lift the front at the proper center jack point.
• Place jack stands (rated 3-ton minimum) under the left and right front support points and lower the car onto them.
• Remove the front wheels using a 21mm socket and ratchet (1/2").

Step 2: Unclip lines from the front strut

• On the strut body, remove any brake hose/ABS wire brackets using a 10mm socket and ratchet (3/8").
• Use a trim clip removal tool or needle-nose pliers for plastic clips (don’t pull on the wires).

Step 3: Disconnect the sway bar link from the strut

• Remove the sway bar end link nut at the strut using a wrench set (typically 17mm).
• If the stud spins, hold it with an Allen key set (metric) while turning the nut with the wrench. (An Allen key is a hex-shaped tool that holds the stud from turning.)

Step 4: Mark and remove the strut-to-knuckle bolts

• Use a paint marker to mark the relationship between the strut and steering knuckle as a reference.
• Support the knuckle lightly with the floor jack so it doesn’t drop and pull on hoses.
• Remove the two large strut-to-knuckle bolts/nuts using a socket set (typically 19mm–22mm) and breaker bar (1/2").

Step 5: Remove the front strut assembly

• Open the hood.
• Remove the strut top mount nuts using a deep socket set (typically 14mm) and ratchet (3/8").
• Hold the strut from below and lower it out of the wheel well.

Step 6: If not using quick-struts, transfer the spring (only if needed)

• Install a coil spring compressor (specialty) onto the spring and compress evenly until the spring is loose in the seat.
• Remove the strut shaft top nut using a socket set while holding the shaft with an Allen key set (metric).
• Move the spring, boot, and mount to the new strut in the same order.
• Compress both sides evenly—count turns.

Step 7: Install the front strut

• Position the strut in the tower and hand-thread the top mount nuts using a deep socket.
• Align the strut to the knuckle and install the lower bolts using a socket and breaker bar.
• Reconnect the sway bar end link using a wrench and hold the stud with an Allen key if needed.
• Reattach brake/ABS brackets using a 10mm socket.
• Torque to 108 Nm (80 ft-lbs) for front strut-to-knuckle bolts (common spec; verify with your exact parts instructions).
• Torque to 34 Nm (25 ft-lbs) for front strut top mount nuts (common spec; verify with your exact parts instructions).

Step 8: Repeat on the other front side

• Repeat Steps 2–7 on the other front corner using the same sockets, wrenches, and torque wrench.

Step 9: Lift and secure the rear

• Move the wheel chocks to the front wheels.
• Use the floor jack to lift the rear and set it on jack stands.
• Remove the rear wheels using a 21mm socket.

Step 10: Access the rear upper shock mount

• Open the trunk.
• Pull back trunk side trim as needed using a trim clip removal tool to access the upper shock nuts.
• Loosen (but don’t fully remove yet) the upper shock nuts using a deep socket (typically 14mm).

Step 11: Remove the rear lower shock bolt

• Support the rear lower control arm slightly with the floor jack.
• Remove the lower shock bolt/nut using a socket set (typically 17mm–19mm) and breaker bar.

Step 12: Remove and replace the rear shock

• Fully remove the upper shock nuts in the trunk using the deep socket.
• Pull the shock out from below.
• Install the new shock with new isolators/mounts as supplied.
• Hand-start the upper nuts first, then install the lower bolt using a socket and ratchet (1/2").
• Torque to 85 Nm (63 ft-lbs) for rear lower shock bolt (common spec; verify with your exact parts instructions).
• Torque to 25 Nm (18 ft-lbs) for rear upper shock nuts (common spec; verify with your exact parts instructions).

Step 13: Reinstall wheels and lower the car

• Reinstall all wheels and snug lug nuts using a 21mm socket.
• Lower the car from the jack stands using the floor jack.
• Torque to 113 Nm (83 ft-lbs) for lug nuts using a torque wrench.

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✅ After Repair

• Drive slowly at first and listen for clunks or rubbing over small bumps.
• Re-check that brake hose/ABS brackets are secure and not twisted.
• Get a 4-wheel alignment (strongly recommended after front struts).
• After 50–100 miles, re-check lug nut torque using a torque wrench.

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💰 DIY vs Shop Cost

Shop Cost: $900-$1,800 (parts + labor)

DIY Cost: $350-$900 (parts only)

You Save: $550-$900 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 4-7 hours.

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🎯 Ready to get started?

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