This procedure replaces the electronic parking brake motor on the rear caliper assembly, requiring caliper removal, brake system work, and electronic parking brake service mode activation.

Warnings

Tools required

Parts

• Electronic parking brake motor assembly × 1 — Motorcraft OEM or equivalent EPB motor
• Brake fluid × 1 — Motorcraft DOT 4 LV
• Brake caliper slide pin grease × 1 — Silicone-based brake grease

Fluids

• Motorcraft DOT 4 LV Brake Fluid — 0.25 qt

Preparation

1. Park vehicle on level ground and set transmission to Park
2. Chock the front wheels securely on both sides
3. Connect OBD-II scan tool and verify it can communicate with EPB module
4. Loosen rear wheel lug nuts 1/2 turn while vehicle is on ground
5. Raise rear of vehicle and support on jack stands at frame rails
6. Remove rear wheel completely
7. Using fluid evacuator or turkey baster, remove approximately 1/3 of brake fluid from master cylinder reservoir to prevent overflow during caliper piston retraction

Procedure

1. 1

   Activate EPB service mode
   Using the OBD-II scan tool, navigate to the EPB control module. Select 'Service Mode' or 'Retract EPB' function. The system will retract the parking brake motor to its full release position. Wait for the scan tool to confirm service mode is active before proceeding. This step is MANDATORY and cannot be skipped.
   ⚠️If service mode cannot be activated, STOP and consult a professional. Attempting to remove the caliper without service mode will damage the EPB motor and piston assembly.
2. 2

   Remove brake caliper
   Locate the two caliper slide pin bolts on the rear of the caliper assembly. Clean around the bolts with brake cleaner. Apply penetrating lubricant if bolts show corrosion. Remove both caliper slide pin bolts. Carefully pivot the caliper upward off the rotor and brake pads. Support the caliper with a hanger or wire - do NOT let it hang by the brake hose.
   ⚠Never allow the caliper to hang unsupported by the brake hose. The weight will damage the hose internally, leading to brake failure.
   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 assembly at the rear of the caliper. Press the locking tab and carefully disconnect the connector. Inspect the connector terminals for corrosion or damage. Clean with electrical contact cleaner if necessary.
   ℹ️The connector may be secured with a secondary clip or zip tie. Remove any additional fasteners before pulling on the connector.
4. 4

   Remove EPB motor mounting bolts
   Identify the EPB motor mounting bolts (typically 2-3 bolts) securing the motor to the rear caliper housing. Clean around the bolt heads with brake cleaner. Using the appropriate socket, remove the mounting bolts and retain them if they are in good condition. Note the exact orientation of the motor for installation reference.
   Torque spec

   Mounting Bolts31 Nm (23 lb-ft)
5. 5

   Remove EPB motor assembly
   Carefully pull the EPB motor straight out from the caliper housing. There may be an O-ring seal between the motor and caliper body - note its position. Inspect the caliper bore and piston mechanism for damage, scoring, or corrosion. If the piston is damaged, the entire caliper assembly must be replaced.
   ⚠On some 2011-2014 F-150 configurations, the EPB motor is integrated with the caliper and cannot be serviced separately. If the motor does not remove cleanly, verify you have the correct replacement part or consider replacing the complete caliper assembly.
6. 6

   Prepare new EPB motor
   Remove the new EPB motor from its packaging. Verify it matches the old motor exactly in terms of connector type, mounting bolt pattern, and overall dimensions. If the new motor includes an O-ring seal, lightly lubricate it with clean brake fluid. Ensure the motor gear is in the fully retracted position.
   ℹ️Some replacement motors come pre-lubricated. Do not remove factory-applied lubricant from the motor gear mechanism.
7. 7

   Install new EPB motor
   Align the new EPB motor with the caliper housing, ensuring the gear teeth properly engage with the piston mechanism. Carefully push the motor into position until it seats flush against the caliper body. Install the mounting bolts and tighten by hand initially to ensure proper thread engagement.
   Torque spec

   Mounting Bolts31 Nm (23 lb-ft)
8. 8

   Torque EPB motor mounting bolts
   Using a torque wrench, tighten the EPB motor mounting bolts to 31 Nm (23 lb-ft) in a cross-pattern if multiple bolts are present. Verify the motor is seated firmly and does not move when pulled gently.
   Torque spec

   Mounting Bolts31 Nm (23 lb-ft)
9. 9

   Reconnect electrical connector
   Reconnect the EPB motor electrical connector, ensuring it clicks fully into place. Tug gently on the connector to verify it is locked. Reinstall any secondary clips or zip ties that were removed earlier.
10. 10

    Reinstall brake caliper
    Remove the caliper from the hanger/support. Verify brake pads are properly positioned in the caliper bracket. If pads were removed, reinstall them now. Position the caliper over the rotor and align the slide pin bolt holes. Apply a thin coating of silicone brake grease to the slide pin bolts. Install both caliper slide pin bolts and hand-tighten.
    ⚠Ensure brake pads are correctly oriented with friction material facing the rotor. Reversed pads will cause immediate brake failure.
    Torque spec

    Caliper Slide Pin Bolts35 Nm (26 lb-ft)
11. 11

    Torque caliper slide pin bolts
    Using a torque wrench, tighten the caliper slide pin bolts to 35 Nm (26 lb-ft). Verify the caliper slides freely on the pins after torquing - it should move slightly when pushed by hand.
    Torque spec

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

    Exit EPB service mode and perform motor calibration
    Using the scan tool, exit EPB service mode. The system will automatically perform a motor calibration cycle. Follow the scan tool prompts, which typically include: applying and releasing the parking brake electronically multiple times. Listen for the motor operating and verify smooth operation without grinding or binding noises.
    ⚠️The motor calibration MUST complete successfully. If the scan tool reports errors or the motor makes abnormal sounds, DO NOT drive the vehicle. Recheck installation and connections.
13. 13

    Bleed brake system if necessary
    If the brake hydraulic line was disconnected (not typical for this job), the brake system must be bled. If only the caliper was removed without opening hydraulic connections, bleeding may not be required but is recommended as a precaution. Pump the brake pedal several times and verify firm pedal feel. Top off the master cylinder with DOT 4 LV brake fluid to the MAX line.
    ⚠Use ONLY Motorcraft DOT 4 LV brake fluid. Standard DOT 3 or DOT 4 fluid will damage the ABS system on this vehicle.
14. 14

    Reinstall wheel and lower vehicle
    Clean the wheel hub surface with a wire brush. Install the wheel and thread lug nuts by hand. Lower the vehicle until the tire just contacts the ground. Torque the lug nuts to 140 Nm (103 lb-ft) in a star pattern. Lower the vehicle completely and remove jack stands.
    Torque spec

    Wheel Lug Nuts140 Nm (103 lb-ft)

Reassembly

1. Repeat the entire procedure for the opposite rear wheel if replacing both EPB motors
2. Verify brake fluid level in master cylinder is between MIN and MAX marks
3. Check for any brake fluid leaks around caliper connections
4. Ensure all tools and parts have been removed from under the vehicle

Verification

• With engine running, press the brake pedal firmly - it should feel firm and not sink to the floor
• Activate the electronic parking brake using the dashboard switch - listen for motor operation and verify the brake warning light illuminates
• Release the electronic parking brake - verify the warning light extinguishes and the motor completes its cycle
• Perform a parking brake hold test: on a slight incline with transmission in neutral, activate EPB and verify the vehicle does not roll
• Perform a low-speed test drive (under 10 mph in a safe area) and verify normal brake operation
• Test EPB function at low speed by activating while rolling - vehicle should come to a controlled stop
• Use scan tool to check for EPB fault codes - there should be none present
• Verify no abnormal noises, vibrations, or warning lights during normal driving

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