Electronic Parking Brake Motor

This procedure covers the removal and replacement of the electronic parking brake (EPB) motor on the rear brake caliper assembly of a 2015 Kia Forte 1.8L I4.

Warnings

Tools required

Parts

• Electronic parking brake motor assembly × 1 — Use OEM specification
• EPB motor O-ring seal (if not included with motor) × 1 — Use OEM specification
• Brake fluid DOT 4 × 1 — As needed for topping off

Fluids

• DOT 4 Brake Fluid — 0.25 qt

Preparation

1. Park vehicle on level surface and engage electronic parking brake.
2. Place wheel chocks in front of both front wheels.
3. Turn ignition to ON position (do not start engine) to prepare for EPB service mode.
4. Connect Kia GDS diagnostic scan tool or equivalent EPB-capable scan tool to OBD-II port.
5. Loosen rear wheel lug nuts 1/4 turn while vehicle is on ground.
6. Raise rear of vehicle using floor jack at designated rear jacking point.
7. Support vehicle securely on jack stands placed at manufacturer-specified support points.
8. Remove rear wheel completely and set aside.
9. Verify brake fluid level in master cylinder reservoir is between MIN and MAX marks.

Procedure

1. 1

   Enter EPB service mode and retract caliper piston
   Using the diagnostic scan tool, navigate to EPB system functions. Select 'Service Mode' or 'Maintenance Mode' to electronically retract the EPB motor and caliper piston to the fully released position. Follow scan tool prompts and wait for confirmation that service mode is active and piston is fully retracted. The EPB warning light should illuminate on the instrument cluster indicating service mode is active. DO NOT proceed until scan tool confirms successful retraction.
   ⚠️Failure to properly retract EPB motor electronically will result in component damage and potential brake system failure. Never attempt manual retraction.
2. 2

   Disconnect EPB motor electrical connector
   Locate the EPB motor electrical connector on the rear of the brake caliper. Press the connector lock tab and carefully disconnect the wiring harness from the EPB motor. Move the harness aside to prevent damage during motor removal. Inspect connector pins for corrosion or damage.
3. 3

   Remove EPB motor mounting bolts
   Identify the two EPB motor mounting bolts securing the motor to the rear brake caliper body. Using appropriate socket (typically 10mm or 12mm), remove both mounting bolts completely. Keep bolts organized for reinstallation or replacement per service manual requirements.
   Torque spec

   Mounting Bolts26 Nm (19 lb-ft)
4. 4

   Remove EPB motor from caliper
   Carefully pull the EPB motor assembly straight out from the caliper body. The motor actuator shaft will disengage from the caliper piston mechanism. Inspect the O-ring seal on the motor housing for damage or deterioration. Check the caliper piston interface area for debris, corrosion, or damage. Clean the mounting surface on the caliper with brake cleaner if needed.
   ⚠Do not allow brake fluid to contact the EPB motor electrical components. Brake fluid contamination can cause motor failure.
5. 5

   Prepare new EPB motor for installation
   Remove new EPB motor from packaging and verify it matches the removed unit. Install new O-ring seal onto the motor housing if not pre-installed, lightly lubricating with clean brake fluid. Verify the motor actuator shaft is in the retracted position. Do not manually rotate or force the motor shaft.
6. 6

   Install new EPB motor
   Align the EPB motor actuator shaft with the caliper piston mechanism interface. Carefully insert the motor straight into the caliper body, ensuring the O-ring seats properly and the motor housing sits flush against the caliper mounting surface. Verify proper alignment before installing bolts.
   ⚠Ensure motor shaft engages properly with piston mechanism. Misalignment can damage internal components and cause brake failure.
7. 7

   Install and torque EPB motor mounting bolts
   Install both EPB motor mounting bolts and tighten by hand until snug. Using a calibrated torque wrench, torque the mounting bolts to specification in a cross pattern to ensure even seating. Verify the motor housing remains flush against the caliper body after torquing.
   Torque spec

   Mounting Bolts26 Nm (19 lb-ft)
8. 8

   Reconnect EPB motor electrical connector
   Reconnect the wiring harness to the EPB motor electrical connector. Ensure the connector fully seats and the locking tab clicks into place. Gently tug on the connector to verify it is secure. Route the wiring to prevent contact with rotating components or heat sources.
9. 9

   Exit EPB service mode and perform initialization
   Using the diagnostic scan tool, exit EPB service mode. Follow the tool prompts to perform EPB initialization or calibration procedure. This process will extend the EPB motor and set proper caliper piston positioning. The scan tool will command the EPB motor through multiple cycles. Wait for confirmation that initialization is complete and no fault codes are present.
   ⚠️EPB initialization MUST be completed successfully before returning vehicle to service. Incomplete initialization can result in parking brake failure.
10. 10

    Verify EPB operation
    With scan tool still connected, command the EPB to apply and release several times using the scan tool active test functions. Listen and feel for smooth motor operation without grinding or binding. Verify the EPB warning light responds appropriately. Check for any fault codes in the EPB system. Clear codes if initialization-related codes are present, then recheck.
11. 11

    Reinstall wheel and lower vehicle
    Reinstall the rear wheel onto the hub. Install all lug nuts and tighten by hand in a star pattern. Lower the vehicle until the tire just contacts the ground but vehicle weight is still on jack stands. Using a calibrated torque wrench, torque the lug nuts to specification in a star pattern in multiple stages. Fully lower vehicle to ground and remove jack stands. Perform final lug nut torque verification.
    Torque spec

    Wheel Lug Nuts140 Nm (103 lb-ft)
12. 12

    Check brake fluid level and test EPB function
    Open the hood and check the brake fluid reservoir level. Top off with DOT 4 brake fluid if necessary to bring level to MAX mark. With engine off and scan tool disconnected, test EPB operation using the vehicle's EPB switch. Apply and release the parking brake several times, verifying proper indicator light function and audible motor operation. Check for any warning lights on the instrument cluster.

Reassembly

1. Ensure all electrical connectors are fully seated and secured
2. Verify no tools or parts were left in the wheel well area
3. Confirm brake fluid level is at proper level with DOT 4 brake fluid
4. Verify wheel lug nuts are torqued to specification in star pattern
5. Test EPB operation both electronically and mechanically before road test

Verification

• With vehicle on level ground and engine off, apply EPB using switch - verify red parking brake warning light illuminates and motor runs smoothly to completion
• Release EPB using switch - verify warning light extinguishes and motor operates smoothly
• Perform a controlled stop test in a safe area - apply EPB while moving at 3-5 mph to verify braking force is applied
• Park vehicle on an incline (if safe area available) - verify EPB holds vehicle stationary without rolling
• Using scan tool, verify no EPB fault codes are present in system memory
• Test service brake pedal feel - pedal should be firm with normal travel, indicating no air in system
• Verify no brake fluid leaks are present at the EPB motor O-ring seal or caliper connections
• Road test vehicle and verify normal brake operation and EPB auto-release function when shifting into drive (if equipped)

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