Parking Brake Actuator

Replace the electric parking brake (EPB) actuator on a 2024 Tesla Cybertruck Cyberbeast. The EPB actuator is integrated into the rear caliper assembly; this procedure covers retracting the actuator electronically, removing the failed unit, installing the replacement, and reinitializing the system.

Warnings

Tools required

Parts

• Parking brake actuator (rear, OEM Cybertruck-specific) × 1 — Manufacturer-specified EPB actuator for 2024 Cybertruck rear caliper — verify with VIN
• Actuator-to-caliper O-ring/seal (if supplied separately) × 1 — OEM seal kit per service manual
• Actuator mounting bolts (replace if single-use) × 3 — OEM specification — verify reuse policy

Fluids

• DOT 3 Brake Fluid (only if system is opened)

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 48V low-voltage battery per Cybertruck service procedure (location and disconnect method differ from 12V Teslas — refer to service manual).
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. Place the vehicle in Jack Mode / Service Mode via the touchscreen to disable air suspension auto-leveling BEFORE disconnecting low-voltage power.
7. Using the diagnostic tool, command the EPB actuator into Service/Retract mode so the actuator piston is fully backed off. Confirm successful retraction before disconnecting power.
8. Chock the front wheels. Loosen the rear lug nuts while the vehicle is on the ground.
9. Lift the vehicle at the manufacturer-specified rear lift points and support on jack stands rated for the Cybertruck's curb weight.
10. Remove the rear wheel(s) on the affected side.

Procedure

1. 1

   Verify EPB is fully retracted
   Confirm via diagnostic tool log or by visual inspection of the actuator that the parking brake mechanism is fully released. If the actuator failed in the applied position and cannot be electronically retracted, STOP and consult the Tesla Service Manual — manual override procedures are model-specific and improper release can damage the caliper.
   ⚠️Never attempt to remove a tensioned EPB actuator. Spring force can eject internal components.
2. 2

   Disconnect actuator electrical connector
   Locate the EPB actuator on the rear of the caliper. Release the connector lock tab and disconnect the wiring harness from the actuator. Inspect the connector for corrosion or pin damage. Note: 48V architecture connectors may have different latching than legacy 12V Tesla connectors — do not force.
3. 3

   Support the caliper (if required for access)
   If actuator access requires caliper removal, remove the caliper slide pin bolts (or caliper bolts as applicable) and support the caliper with a hanger — DO NOT let it hang by the flexible brake hose. On many designs the actuator can be replaced with the caliper still mounted; assess access before disturbing the caliper.
   Torque spec

   Caliper Slide Pin Bolts35 Nm (26 lb-ft)

   Caliper Bolts88 Nm (65 lb-ft)
4. 4

   Remove the failed actuator
   Remove the actuator mounting fasteners (typically 3 bolts) securing the actuator to the rear of the caliper body. Withdraw the actuator straight back to avoid damaging the drive coupling or seal. Capture the O-ring/seal between actuator and caliper.
   ⚠A small amount of grease may be present at the actuator-caliper interface — do not allow contamination of brake pads or rotor.
   Torque spec

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

   Inspect caliper interface
   Inspect the caliper bore, drive spindle, and sealing surface. Clean with brake parts cleaner if contaminated. If the spindle is damaged or the caliper piston is seized, the entire caliper must be replaced — actuator-only replacement will not resolve the fault.
6. 6

   Install new actuator
   Fit the new O-ring/seal to the actuator (lightly lubricate per service manual if specified). Align the actuator drive coupling with the caliper spindle and seat the actuator squarely against the caliper — it should drop in without force. If it does not seat fully, recheck alignment; do not pull it in with the bolts.
7. 7

   Torque actuator mounting bolts
   Install the actuator mounting bolts and torque evenly in a cross pattern to specification. Apply threadlocker only if specified by the OEM procedure for these fasteners.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)
8. 8

   Reconnect electrical connector
   Reconnect the harness to the actuator until the lock tab fully engages. Verify the connector is fully seated — partial seating can cause intermittent EPB faults that disable Autopilot and parking brake function.
9. 9

   Reinstall caliper (if removed)
   If the caliper was removed for access, reinstall using the appropriate fastener torque. Apply silicone brake grease to slide pins where applicable. Reassemble in the correct sequence and verify pad/rotor alignment.
   Torque spec

   Caliper Slide Pin Bolts35 Nm (26 lb-ft)

   Caliper Bolts88 Nm (65 lb-ft)

   Bracket Bolts102 Nm (75 lb-ft)
10. 10

    Reinstall wheel
    Mount the rear wheel and hand-thread all lug nuts. Lower the vehicle until the tire just contacts the ground, then torque lug nuts in a star pattern to specification.
    Torque spec

    Wheel Lug Nuts140 Nm (103 lb-ft)

Reassembly

1. Lower the vehicle fully to the ground.
2. Reconnect the 48V low-voltage battery per service manual sequence.
3. Power the vehicle on; expect EPB, ABS, and possibly suspension/Autopilot warnings on the touchscreen until calibration is complete.
4. Using the diagnostic tool, run the EPB actuator initialization/calibration routine. This typically commands a full apply and full release cycle to learn end-stops.
5. Clear any stored DTCs related to the EPB.
6. Exit Jack/Service Mode and allow air suspension to re-level.

Verification

• Confirm no EPB, ABS, or stability control warnings remain on the touchscreen.
• Apply and release the parking brake several times via the touchscreen control; listen for clean actuator engagement and verify the dash indicator illuminates and extinguishes correctly.
• With the vehicle stopped on a slight incline (in a safe area), apply the parking brake and confirm it holds the truck against creep in both D and R.
• Perform a low-speed road test (≤15 mph in an empty area) and trigger the dynamic parking brake function via the touchscreen to confirm functionality, then re-scan for DTCs.
• Inspect the actuator-caliper interface for any signs of grease leakage after the test drive.
• Service reminder: Tesla recommends brake fluid replacement every 2 years regardless of mileage — if the fluid is approaching that interval, schedule a flush. The EPB itself does not interact with hydraulic fluid, but rear caliper service is a convenient time to inspect fluid condition.

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