Replace the electronic parking brake motor on the rear brake caliper assembly to restore parking brake function.

Warnings

Tools required

Parts

• Electronic parking brake motor/actuator × 1 — 47750-06031 or equivalent OEM
• EPB motor O-ring seal × 1 — Use OEM specification
• Brake caliper mounting bolts (if corroded) × 2 — Use OEM specification

Fluids

• DOT 3 Brake Fluid — 0.5 qt

Preparation

1. Park vehicle on level surface and place wheel chocks in front of front wheels
2. Connect scan tool and verify communication with EPB system before beginning work
3. Start engine and allow EPB system to initialize, then turn off ignition
4. Check brake fluid level in master cylinder reservoir and mark current level
5. Loosen rear wheel lug nuts 1/4 turn while vehicle is on ground
6. Raise rear of vehicle and support securely on jack stands at manufacturer specified jacking points
7. Remove rear wheel completely

Procedure

1. 1

   Release EPB caliper piston using scan tool
   Connect scan tool to OBD-II port. Navigate to EPB service mode or maintenance mode function. Select 'Retract EPB Caliper' or 'Service Mode ON' for the side being serviced. The caliper piston must be electronically retracted before motor removal. Wait for confirmation that motor has fully retracted. DO NOT attempt to manually force piston retraction.
   ⚠️Forcing piston retraction without scan tool command will strip motor gears and damage caliper assembly requiring complete caliper replacement.
2. 2

   Remove brake caliper from bracket
   Remove the two caliper slide pin bolts securing the caliper to the bracket using 14mm socket. Carefully lift caliper away from brake rotor. Support caliper with wire or bungee cord from suspension components - do NOT let it hang by brake hose. Note position of brake pads if reusing.
   Torque spec

   Caliper Slide Pin Bolts35 Nm (26 lb-ft)
3. 3

   Disconnect EPB motor electrical connector
   Locate the electrical connector on the EPB motor (usually at rear or top of caliper). Press release tab and carefully disconnect the connector. Inspect connector terminals for corrosion or damage. Clean with electrical contact cleaner if necessary.
   ⚠Do not pull on wires. Press release tab fully before separating connector to avoid breaking retaining tabs.
4. 4

   Remove EPB motor mounting bolts
   Using 10mm socket, remove the two bolts securing the EPB motor to the rear of the caliper assembly. Keep track of bolt locations as they may be different lengths. Note the position and orientation of the motor before removal.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)
5. 5

   Remove EPB motor from caliper
   Carefully pull the EPB motor straight out from the caliper body. The motor shaft engages with the caliper piston spindle mechanism. You may need to rotate motor slightly while pulling. Remove and inspect the O-ring seal on motor shaft. If motor is stuck, gently wiggle while pulling - do NOT pry against caliper body.
   ⚠Do not rotate or force motor excessively as internal spindle mechanism can be damaged if motor was not properly retracted.
6. 6

   Clean motor mounting surface
   Use wire brush and brake cleaner to thoroughly clean the motor mounting surface on caliper. Remove all corrosion, old seal material, and brake dust. Inspect caliper bore where motor mounts for damage or excessive corrosion. Check that piston spindle mechanism rotates freely by hand.
   ℹ️If spindle mechanism is seized or damaged, entire caliper assembly requires replacement.
7. 7

   Install new O-ring on replacement motor
   Install new O-ring seal onto the shaft of the replacement EPB motor. Lightly lubricate O-ring with clean brake fluid or silicone brake grease. Ensure O-ring is properly seated in its groove and not twisted. Verify replacement motor part number matches original.
   ⚠Do not use petroleum-based lubricants on brake system O-rings as they will cause seal deterioration.
8. 8

   Install EPB motor to caliper
   Align EPB motor shaft with caliper piston spindle mechanism. The motor shaft has a specific orientation - align flat or key on shaft with corresponding feature in piston. Push motor straight into caliper body until it seats fully against mounting surface. Motor should slide in with minimal resistance when properly aligned.
   ⚠Forcing misaligned motor will damage spindle mechanism. If excessive resistance is felt, remove and check alignment.
9. 9

   Secure EPB motor with mounting bolts
   Install the two motor mounting bolts in their correct positions. Thread bolts by hand first to ensure proper thread engagement. Torque bolts evenly in alternating pattern to specification using torque wrench. Verify motor sits flush against caliper body with no gaps.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)
10. 10

    Reconnect electrical connector
    Reconnect the EPB motor electrical connector, ensuring it clicks fully into place. Gently tug on connector to verify it is locked. Route wiring away from moving suspension components and heat sources. Ensure wire has adequate slack for suspension travel.
11. 11

    Reinstall brake caliper
    If removed, install brake pads in correct positions on caliper bracket. Clean caliper slide pins with wire brush and apply fresh silicone brake grease to pins. Position caliper over rotor and brake pads. Install and hand-thread caliper slide pin bolts. Torque bolts to specification using torque wrench.
    ⚠Ensure brake pad anti-rattle clips are properly positioned and pads move freely in bracket before installing caliper.
    Torque spec

    Caliper Slide Pin Bolts35 Nm (26 lb-ft)
12. 12

    Initialize EPB system with scan tool
    With scan tool still connected, exit service mode or select 'Initialize EPB' function. Turn ignition to ON position (engine can remain off). Follow scan tool prompts to calibrate EPB motor. System will extend and retract piston multiple times. Listen for motor operation - should be smooth without grinding. Wait for scan tool confirmation of successful initialization.
    ⚠️Do not skip EPB initialization. System will not function correctly and may fail to hold vehicle, creating roll-away risk.
13. 13

    Reinstall wheel and lower vehicle
    Reinstall rear wheel, threading lug nuts by hand first. Lower vehicle until tire barely touches ground. Torque lug nuts to specification in star pattern using torque wrench. Completely lower vehicle and remove jack stands. Torque lug nuts again in star pattern to final specification on ground.
    Torque spec

    Wheel Lug Nuts140 Nm (103 lb-ft)

Reassembly

1. Check brake fluid level in master cylinder reservoir and top off with DOT 3 fluid if needed - level should be at MAX line
2. Do not drive vehicle until verification tests are completed successfully
3. Clear any EPB fault codes stored in system using scan tool
4. Repeat entire procedure for opposite side if both EPB motors are being replaced

Verification

• With engine running and transmission in PARK, apply EPB using dashboard switch - should hear motor operation and see EPB warning light illuminate on dash
• Attempt to move vehicle while EPB is applied - vehicle should not roll
• Release EPB using dashboard switch - warning light should extinguish and motor should operate smoothly
• Perform 5-10 EPB application and release cycles to verify consistent operation
• Test drive vehicle in safe area at low speed (under 5 mph) and verify EPB holds vehicle on slight incline
• Verify no EPB warning lights or messages appear on instrument cluster during normal driving
• Using scan tool, verify no EPB fault codes are present in system memory
• Check for any brake fluid leaks around caliper and EPB motor mounting area
• Verify proper brake pedal feel and height - pedal should be firm and consistent

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