🔧 XT4 - Rear Brake Pad Replacement

Replacing the rear brake pads on your XT4 means removing the rear wheels, taking the rear calipers off, swapping the pads, then reassembling and re-initializing the parking brake system (if equipped with Electronic Parking Brake).

Most rear pad jobs go smoothly, but the key is handling the rear piston/parking brake correctly so you don’t damage the caliper.

Difficulty Level: Intermediate | Estimated Time: 1.5-3.0 hours

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⚠️ Safety & Precautions

• ⚠️ Support the vehicle with jack stands; never rely on a jack alone.
• ⚠️ If your XT4 has an Electronic Parking Brake (EPB) (button on console), you must retract it with a scan tool EPB service mode before pushing pistons in.
• ⚠️ Brake dust is harmful; use brake cleaner instead of compressed air.
• ⚠️ Do one side at a time so you can reference the other side for correct pad/hardware orientation.
• ⚠️ Battery disconnect is not typically required for pads, but keep the ignition OFF unless you’re using EPB service mode.

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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" drive)
• Torque wrench (10-200 Nm range)
• 19mm socket (1/2" drive)
• Socket set (1/2" drive)
• Socket set (3/8" drive)
• Ratchet (3/8" drive)
• Caliper piston compression tool (specialty)
• Caliper hanger hook
• Flat-blade screwdriver
• Trim/pick tool
• Wire brush
• Small bungee cord
• Safety glasses
• Nitrile gloves
• Scan tool with EPB service mode (specialty)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear brake pad set - Qty: 1
• Rear pad hardware/abutment clip kit - Qty: 1
• Brake parts cleaner - Qty: 1
• Silicone brake grease - Qty: 1

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📋 Before You Begin

• Park on level ground, set the transmission to P, and place wheel chocks at the front wheels.
• Release the parking brake (if it’s on) using the EPB switch.
• If equipped with EPB, retract it using a scan tool: use Scan tool > Chassis/Brake > Electronic Parking Brake > Service Mode.
• Open the hood and locate the brake fluid reservoir; fluid may rise when pistons are pushed back. Do not overflow the reservoir.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Loosen rear wheel lug nuts

• Use a 19mm socket and breaker bar to crack the rear lug nuts loose about 1/2 turn while the wheel is on the ground.

Step 2: Lift and support the rear

• Use a floor jack to lift at the approved rear jacking point, then set the vehicle on jack stands.
• Give the vehicle a firm shake to confirm it’s stable.

Step 3: Remove the rear wheels

• Use a 19mm socket and ratchet to remove the lug nuts, then remove the wheels.

Step 4: Put the EPB into service mode (if equipped)

• Use a scan tool with EPB service mode (specialty) and select Scan tool > Chassis/Brake > Electronic Parking Brake > Service Mode.
• This retracts the parking brake actuator so the rear pistons can be pushed in normally.

Step 5: Remove the rear caliper (do not hang by the hose)

• Use your ratchet and socket set (3/8" drive) to remove the two caliper guide/slide pin bolts.
• Lift the caliper off the bracket. Use a caliper hanger hook (a metal hook that supports the caliper) or small bungee cord to hang it from the suspension.
• Torque spec (reinstall): Torque to 31 Nm (23 ft-lbs)

Step 6: Remove old pads and hardware

• Pull the inner and outer pads out of the bracket by hand. Use a flat-blade screwdriver gently if they’re stuck.
• Remove the stainless abutment clips (hardware) using a trim/pick tool.

Step 7: Clean and prep the bracket

• Spray the bracket contact areas with brake parts cleaner and wipe clean.
• Use a wire brush to remove rust where the clips sit. Clean metal helps pads slide freely.
• Install the new hardware clips by hand (they should snap into place).

Step 8: Compress the rear caliper piston

• Place the old inner pad against the piston face, then use a caliper piston compression tool (specialty) to slowly push the piston back into the caliper.
• Go slowly and keep the tool straight so you don’t cock the piston.
• If the piston will not compress and your XT4 has EPB, stop and re-check EPB service mode with the scan tool.

Step 9: Install new rear pads

• Apply a very thin film of silicone brake grease to pad “ears” where they touch the hardware clips (do not get grease on friction material).
• Install the new inner and outer pads into the bracket by hand.

Step 10: Reinstall caliper and tighten bolts

• Lower the caliper over the new pads.
• Use your ratchet and socket set (3/8" drive) to reinstall the caliper guide/slide pin bolts.
• Torque to 31 Nm (23 ft-lbs)

Step 11: Repeat on the other rear wheel

• Repeat Steps 5 through 10 on the other side.

Step 12: Reinstall wheels and torque lug nuts

• Reinstall the wheels and hand-thread all lug nuts.
• Lower the vehicle off the jack stands using the floor jack.
• Use a torque wrench and 19mm socket to tighten lug nuts in a star pattern.
• Torque to 140 Nm (103 ft-lbs)

Step 13: Exit EPB service mode and re-seat pads

• Use the scan tool to exit service mode: Scan tool > Chassis/Brake > Electronic Parking Brake > Exit Service Mode.
• Press the brake pedal slowly 10-15 times until it feels firm. This seats the pads against the rotors.
• Check the brake fluid level and top off only if needed.

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✅ After Repair

• Start the engine and verify the brake pedal feels firm before shifting out of Park.
• Test the EPB: apply and release it with the switch and confirm no warning lights.
• Do a cautious road test at low speed first, then re-check for abnormal noises.
• Brake pad break-in: make 8-10 moderate stops from 30 mph to 5 mph, with cool-down driving between stops. Avoid hard stops for 200 miles.

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💰 DIY vs Shop Cost

Shop Cost: $250-$450 (parts + labor)

DIY Cost: $60-$180 (parts only)

You Save: $190-$270 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5-2.5 hours.

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🎯 Ready to get started?

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