Replace the electronic parking brake actuator located on the rear brake caliper, which controls the parking brake application and release.

Warnings

Tools required

Parts

• Electronic parking brake actuator assembly × 1 — Use OEM specification
• Brake fluid (for bleeding) × 1 — Mopar DOT 4

Fluids

• brake — 0.5 qt

Preparation

1. Park vehicle on level ground and place transmission in Park (automatic) or 1st gear (manual)
2. Apply parking brake manually before beginning (you will release it with scan tool later)
3. Gather all tools and parts before starting
4. Ensure scan tool is connected and can communicate with the Electronic Parking Brake (EPB) module
5. Loosen wheel lug nuts while vehicle is on ground (do not remove)
6. Raise rear of vehicle and support with jack stands at manufacturer-approved jacking points on frame rails
7. Remove rear wheel on side being serviced
8. Place brake fluid catch pan under work area

Procedure

1. 1

   Retract electronic parking brake actuator
   Using the scan tool, navigate to EPB service functions and select 'Retract Caliper' or 'Service Mode' for the rear brake being serviced. The actuator motor will fully retract the caliper piston. Wait for the scan tool to confirm the operation is complete. Do NOT proceed until the actuator has fully retracted.
   ⚠️Never attempt to manually compress the rear caliper piston. The electronic actuator must be retracted using the scan tool only.
2. 2

   Disconnect brake line fitting
   Using a line wrench, carefully loosen and disconnect the brake line fitting from the rear brake caliper. Be prepared for brake fluid spillage. Cap or plug the brake line immediately to prevent contamination and further fluid loss. Allow fluid to drain into catch pan.
   ⚠Use only a proper line wrench to prevent rounding off the brake line fitting. A standard wrench will damage the fitting.
   Torque spec

   Line Fittings23 Nm (17 lb-ft)
3. 3

   Remove caliper mounting bolts
   Remove the two caliper mounting bolts that secure the caliper to the brake caliper bracket/adapter. Support the caliper as you remove the second bolt to prevent it from falling. Do not let the caliper hang by the brake hose (it is already disconnected).
   Torque spec

   Caliper Bolts102 Nm (75 lb-ft)
4. 4

   Remove caliper assembly
   Carefully remove the brake caliper assembly from the rotor and bracket. Set it on a clean work surface. Inspect the caliper mounting bolts for damage and replace if threads are damaged or stretched.
5. 5

   Remove parking brake actuator
   Disconnect the electrical connector from the parking brake actuator motor. Remove the mounting bolts securing the actuator to the caliper body. Note the orientation and position of the actuator for installation of the new unit. Remove the old actuator from the caliper.
   ⚠The actuator gear mechanism may contain residual grease. Clean the mounting surface on the caliper thoroughly before installing the new actuator.
   Torque spec

   Mounting Bolts31 Nm (23 lb-ft)
6. 6

   Install new parking brake actuator
   Position the new parking brake actuator onto the caliper body, ensuring proper alignment of the drive gear with the caliper piston mechanism. Install the mounting bolts and torque to specification. Reconnect the electrical connector, ensuring it clicks securely into place.
   Torque spec

   Mounting Bolts31 Nm (23 lb-ft)
7. 7

   Install caliper assembly
   Clean the caliper mounting bolt holes and apply medium-strength thread locker to the caliper bolt threads as specified. Position the caliper over the brake rotor and align with the mounting bracket. Install both caliper mounting bolts and torque to specification in an alternating pattern.
   ⚠Thread locker is REQUIRED on caliper bolts. Failure to use thread locker can result in bolts loosening and complete brake failure.
   Torque spec

   Caliper Bolts102 Nm (75 lb-ft)
8. 8

   Reconnect brake line
   Remove the cap or plug from the brake line. Thread the brake line fitting into the caliper by hand first to ensure proper thread engagement and prevent cross-threading. Using a line wrench, tighten the fitting to the specified torque.
   Torque spec

   Line Fittings23 Nm (17 lb-ft)
9. 9

   Bleed rear brake caliper
   Have an assistant pump the brake pedal several times and hold pressure. Open the bleeder screw on the caliper and allow fluid and air to escape into the catch pan. Close the bleeder screw before the pedal reaches the floor. Repeat until clean fluid with no air bubbles flows from the bleeder. Torque bleeder screw to specification. Refill master cylinder with fresh DOT 4 brake fluid as needed during bleeding.
   ⚠Never allow the brake fluid reservoir to run dry during bleeding or air will enter the ABS system, requiring professional service.
   Torque spec

   Bleeder Screw16 Nm (12 lb-ft)
10. 10

    Calibrate electronic parking brake
    Using the scan tool, perform the EPB calibration procedure. This typically involves selecting 'Apply' and 'Release' functions multiple times to allow the system to learn the new actuator position. Follow the specific prompts on your scan tool. The system should complete calibration without error codes.
    ⚠EPB calibration is CRITICAL. If calibration fails or error codes are present, the parking brake will not function properly. Verify with a professional if calibration cannot be completed.
11. 11

    Reinstall wheel
    Clean the wheel hub surface and wheel mounting surface. Install the wheel and thread lug nuts by hand. Lower the vehicle until the tire just contacts the ground (still supported by jack). Torque lug nuts in a star pattern to specification. Fully lower the vehicle and remove jack stands.
    Torque spec

    Wheel Lug Nuts156 Nm (115 lb-ft)

Reassembly

1. Verify brake fluid level in master cylinder reservoir is at MAX line; top off with fresh DOT 4 fluid if needed
2. Check for brake fluid leaks at the caliper line fitting
3. Ensure all tools and parts are removed from under vehicle

Verification

• With engine running, pump brake pedal firmly several times and verify firm pedal feel with no excessive travel
• Using scan tool, command EPB to apply and release multiple times; verify smooth operation with no unusual noises
• Test drive in a safe area at low speed (under 10 mph); verify normal brake function and that vehicle stops straight without pulling
• On a slight incline, apply electronic parking brake and verify vehicle is held securely
• Perform final inspection for any brake fluid leaks around caliper and line fitting
• Check scan tool for any EPB-related diagnostic trouble codes; address any codes before returning vehicle to service
• Re-torque wheel lug nuts after 50-100 miles of driving

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