Replace the electronic parking brake motor on the rear brake 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 — Use OEM Mopar specification
• Brake caliper seal/O-ring kit (if applicable) × 1 — Verify with dealer parts department
• High-temperature silicone brake grease × 1 — Use OEM specification
• Thread locker (medium strength) × 1 — Loctite 243 or equivalent

Fluids

• Mopar DOT 4 Brake Fluid — 1 qt

Preparation

1. Park vehicle on level, solid ground and engage transmission park
2. Place wheel chocks in front of front wheels
3. Verify battery is fully charged (12.4V minimum) as EPB service mode requires stable power
4. Connect OBD-II scan tool and verify communication with EPB control module
5. Remove approximately 1/3 of brake fluid from master cylinder reservoir using turkey baster to prevent overflow during caliper piston retraction
6. Loosen rear wheel lug nuts 1/4 turn while vehicle is on ground
7. Raise rear of vehicle and support with jack stands at frame contact points per service manual
8. Remove rear wheel on side requiring motor replacement

Procedure

1. 1

   Enter EPB service mode
   Using the OBD-II scan tool with EPB service function, navigate to the EPB control module. Select 'Service Mode' or 'Caliper Retraction Mode' to electronically retract the parking brake motor and piston. The motor will fully retract, allowing caliper removal. Verify the motor has completed retraction cycle before proceeding. This step is CRITICAL - attempting to force piston retraction manually will damage the motor assembly.
2. 2

   Remove brake caliper
   Clean around caliper slide pin bolts with brake cleaner. Remove the lower caliper slide pin bolt first, then swing caliper upward on upper pin. Remove upper caliper slide pin bolt and carefully remove caliper assembly from bracket. Support caliper with mechanics wire or bungee cord - do NOT allow caliper to hang by brake hose. Inspect brake pads and rotor for unusual wear patterns that might indicate previous parking brake malfunction.
   Torque spec

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

   Disconnect brake hose (if necessary)
   If the parking brake motor cable/connector length allows motor replacement without hose disconnection, skip to step 4. Otherwise, place drain pan under caliper. Using appropriately sized wrench, disconnect brake hose banjo bolt from caliper body. Immediately plug brake hose and caliper port with clean rubber plugs to prevent fluid loss and contamination. Note the copper crush washers on each side of banjo fitting for replacement during reassembly.
4. 4

   Disconnect EPB motor electrical connector
   Locate the electrical connector on the parking brake motor assembly (typically has a weatherproof boot). Press release tab and disconnect connector. Inspect connector pins and seals for corrosion or damage. Clean connector with electrical contact cleaner if corrosion is present. On 2014 models, connector may have secondary locking tab requiring small screwdriver to release.
5. 5

   Remove parking brake motor assembly
   Identify motor mounting bolts (typically 2-3 bolts depending on caliper design). Apply penetrating oil if bolts show corrosion. Remove mounting bolts in cross-pattern if multiple bolts present. Carefully extract motor assembly from caliper body, noting orientation and any alignment pins or dowels. Inspect caliper bore and motor mounting surface for corrosion, scoring, or damage. Clean mounting surfaces thoroughly with brake cleaner and wire brush.
   Torque spec

   Mounting Bolts37 Nm (27 lb-ft)
6. 6

   Prepare new parking brake motor
   Unpack new parking brake motor and verify part number matches original. Inspect new motor for shipping damage. Check that motor is in retracted position - if not, it may need to be retracted using scan tool before installation. Apply thin coat of silicone brake grease to mounting surface O-ring or seal (if equipped). Do NOT use petroleum-based grease which will damage brake system seals.
7. 7

   Install new parking brake motor
   Align motor assembly with caliper body, ensuring any alignment pins or dowels are properly seated. Verify O-ring or gasket (if equipped) is properly positioned and not pinched. Install mounting bolts hand-tight first to ensure proper thread engagement. Torque mounting bolts in cross-pattern to specification. Apply medium-strength thread locker to bolts if specified by manufacturer or if original bolts had thread locker evidence.
   Torque spec

   Mounting Bolts37 Nm (27 lb-ft)
8. 8

   Reconnect electrical connector
   Reconnect electrical connector to new parking brake motor, ensuring positive click engagement. Verify secondary lock (if equipped) is fully seated. Gently tug connector to confirm secure attachment. Ensure connector boot is properly sealed to prevent moisture intrusion.
9. 9

   Reinstall caliper assembly
   If brake hose was disconnected, install new copper crush washers on each side of banjo fitting and reconnect hose to caliper. Torque banjo bolt per service manual specification (typically 30-40 Nm). Apply silicone brake grease to caliper slide pins - wipe off excess to prevent contamination. Position caliper over brake pads and rotor. Install upper slide pin bolt first, then lower bolt. Torque slide pin bolts to specification in sequence.
   Torque spec

   Caliper Slide Pin Bolts35 Nm (26 lb-ft)
10. 10

    Bleed brake system (if hose disconnected)
    If brake hose was disconnected, bleeding is mandatory. If hose remained connected, proceed to step 11. Clean bleeder screw area. Attach clear hose to bleeder screw and place other end in catch container with small amount of clean brake fluid. Have assistant pump brake pedal 3-4 times and hold pressure. Open bleeder screw 1/2 turn, allow fluid to flow until stream is bubble-free, then close bleeder before pedal reaches floor. Repeat until no air bubbles appear. Torque bleeder screw to specification - DO NOT OVERTIGHTEN as threads strip easily.
    Torque spec

    Bleeder Screw10 Nm (7 lb-ft)
11. 11

    Exit EPB service mode and calibrate motor
    Using scan tool, exit EPB service mode. Execute 'EPB Calibration' or 'Motor Learning' procedure through scan tool. This teaches the new motor the caliper piston position and sets reference points. Motor will extend and retract several times during calibration - this is normal. Calibration must complete successfully before vehicle operation. If calibration fails, verify electrical connections and battery voltage, then retry.
12. 12

    Reinstall wheel and lower vehicle
    Clean wheel mounting surface and hub face with wire brush. Install wheel and start all lug nuts by hand to prevent cross-threading. Tighten lug nuts in star pattern to snug but not final torque. Lower vehicle until tire just contacts ground but weight remains on jack stands. Torque lug nuts to specification in star pattern. Fully lower vehicle and remove jack stands. Re-torque lug nuts in star pattern after vehicle weight is fully on wheels.
    Torque spec

    Wheel Lug Nuts140 Nm (103 lb-ft)

Reassembly

1. Refill brake fluid reservoir to MAX line with fresh DOT 4 brake fluid if fluid was removed or system was bled
2. Pump brake pedal several times until firm pedal is achieved before attempting to move vehicle
3. If brake hose was disconnected, a full brake system bleed at all four wheels is recommended for optimal pedal feel
4. Clean any brake fluid spills from painted surfaces immediately with water

Verification

• With scan tool, verify no EPB fault codes are present and motor calibration shows complete
• Test electronic parking brake apply/release function 3-5 times using dashboard switch - verify smooth operation without abnormal noise
• Start engine and verify brake warning light extinguishes and no EPB warning messages appear
• With vehicle on level ground, engage EPB and verify vehicle will not roll in neutral (with assistant ready at service brake)
• Perform test drive in safe area: verify service brakes operate normally with firm pedal, verify EPB releases completely (no drag), and verify EPB emergency apply function works when switch is pulled while driving at low speed (under 5 mph)
• After test drive, inspect caliper area for any brake fluid leaks
• Re-check brake fluid level and top off if needed
• After 50-100 miles, re-torque wheel lug nuts to specification and re-check for any EPB fault codes

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