Replacement of the electronic parking brake (EPB) motor/actuator on a 2024 Model X Plaid. The EPB motors are mounted to the rear calipers and must be retracted electronically before removal — without proper retraction the caliper piston cannot be pushed back.

Warnings

Tools required

Parts

• Electronic Parking Brake Motor/Actuator (rear, left or right as applicable) × 1 — Manufacturer-specified EPB motor for 2024 Model X Plaid rear caliper
• EPB motor mounting bolts (if specified as single-use) × 3 — Per Tesla Service Manual — replace if specified
• EPB motor O-ring/seal (if supplied separately) × 1 — OEM seal kit

Preparation

1. Park on level ground, place in P, engage parking brake.
2. Exit ALL doors with key fob away from the vehicle. Wait at least 2 minutes for HV systems to fully de-energize, even on this non-HV job.
3. Disconnect the 12V low-voltage battery located in the frunk (similar position to Model S). Open the frunk, remove the front trim/cowl as required, and disconnect the negative terminal.
4. DO NOT touch, cut, or pierce ANY orange cable — these are high-voltage and lethal.
5. If at any point you encounter an orange cable, an HV component, or are unsure if a system is de-energized: STOP and consult a Tesla-certified technician.
6. BEFORE disconnecting the 12V: connect the diagnostic tool, place the vehicle in 'Jack Mode' via the touchscreen (Controls → Service → Jack Mode), and run the EPB Service/Retract routine to fully retract the parking brake actuator.
7. Confirm the EPB has retracted (audible motor stop, no fault) before powering down.
8. Loosen rear wheel lug nuts while the vehicle is still on the ground.
9. Raise the rear of the vehicle using factory jack points with proper puck adapters; support on jack stands.
10. Remove the rear wheel on the side being serviced.

Procedure

1. 1

   Verify EPB is in service mode
   Confirm via diagnostic tool that the EPB actuator is fully retracted and in service/maintenance mode. The motor should be powered down. If the EPB cannot be commanded into service mode due to an existing fault, document the fault before proceeding — a stuck actuator may require manual disassembly steps not covered here.
   ⚠️Skipping this step risks damaging the new actuator on installation and may strand the caliper in an applied state.
2. 2

   Inspect and clean the EPB motor area
   Locate the EPB motor on the rear (inboard) face of the rear caliper. Clean accumulated road grime around the motor housing and electrical connector with a brush and brake cleaner so debris does not enter the caliper bore during removal.
3. 3

   Disconnect EPB electrical connector
   Release the locking tab on the EPB motor electrical connector and disconnect it. Inspect the pins for corrosion or water intrusion — a corroded connector is a common cause of EPB faults and may indicate the harness side also needs attention. Move the harness aside and secure it so it is not under tension.
4. 4

   Remove EPB motor mounting fasteners
   Remove the fasteners (typically Torx) securing the EPB motor housing to the caliper body. Support the motor as the last fastener is removed so it does not fall. Note the orientation of the motor for reinstallation.
   Torque spec

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

   Separate EPB motor from caliper
   Carefully pull the EPB motor straight off the caliper. There is an internal drive coupling (spindle) that engages with the caliper's piston actuation screw — do not pry against the caliper body. If the motor resists removal, verify it was actually placed in service mode; do not force it. Inspect the sealing O-ring/gasket and the drive coupling for damage.
   ⚠Do not allow dirt or moisture to enter the caliper opening once the motor is removed. Cover with a clean lint-free cloth if installation is delayed.
6. 6

   Inspect caliper drive interface
   With the motor off, inspect the exposed drive socket on the caliper for water, corrosion, or stripped splines. If the splines are damaged, the caliper itself must be replaced — the new motor alone will not resolve the fault. Verify the caliper piston spindle is in the fully retracted (service) position.
7. 7

   Install new EPB motor
   Transfer or install the new sealing O-ring (lightly lubricated per the seal manufacturer's instruction). Align the new motor's drive coupling with the caliper spindle and seat the motor flush against the caliper body. The motor should seat by hand — if it will not seat, do not force it; recheck alignment of the internal coupling.
8. 8

   Torque EPB motor fasteners
   Install the mounting fasteners. If the OEM specifies threadlocker or replacement of single-use bolts, follow that specification. Torque to OEM specification — refer to Tesla Service Manual; for the EPB motor mounting bolts on this caliper family, use the verified Mounting Bolts spec.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)
9. 9

   Reconnect EPB electrical connector
   Reconnect the harness connector to the new motor and confirm the locking tab is fully engaged (audible click). Route and secure the harness in its original clips so it does not contact the rotor or moving suspension components.

Reassembly

1. Reinstall the rear wheel. Hand-thread all lug nuts before applying torque.
2. Lower the vehicle to the ground.
3. Torque the wheel lug nuts in a star pattern — refer to Wheel Lug Nuts spec.
4. Reconnect the 12V battery (negative terminal last). Reinstall any frunk trim that was removed.
5. Power up the vehicle and exit Jack Mode if it persists; verify the air suspension self-levels normally.
6. Connect the diagnostic tool and run the EPB initialization/calibration routine. This sequence brings the new actuator out of service mode, applies and releases the parking brake, and clears any related DTCs.
7. Clear any stored fault codes related to the EPB or chassis system.

Verification

• With the diagnostic tool, confirm there are no active or stored EPB-related DTCs.
• On the touchscreen, verify no parking brake warning is displayed and that the brake icon behaves normally when toggled (Controls → Safety → Parking Brake, or via the gear stalk on Plaid).
• Apply and release the EPB several times — listen for the actuator engaging on the serviced wheel and confirm symmetric sound from both rear corners.
• With the vehicle on a slight incline, place in N and verify the EPB holds the vehicle without rolling, then releases cleanly when shifted to D or R.
• Road test at low speed and confirm no brake drag, no pulling, and no warnings appear after a heat cycle.
• Re-inspect the EPB motor area for fluid leakage or harness chafe after the road test.
• Service interval reminder: while the wheels are off, this is a good opportunity to inspect brake pad thickness and rotor condition, and to verify the brake fluid service interval (Tesla recommends brake fluid replacement every 2 years regardless of mileage). The cabin air filter (every 2 years, or 3 years on HEPA-equipped Model X) is also worth checking on the same visit.

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