Replacement of the parking brake actuation mechanism on a 2012 Tesla Roadster. Note: the 2012 Roadster (Lotus Elise-based chassis) uses a traditional cable-operated mechanical handbrake acting on the rear calipers — it does NOT have an electronic parking brake motor from the factory. Verify the vehicle's actual configuration before proceeding; if an aftermarket EPB has been installed, follow that kit's instructions instead.

Warnings

Tools required

Parts

• Parking brake actuator/motor assembly — manufacturer-specified replacement for this vehicle × 1 — Refer to Tesla Roadster parts catalog or aftermarket EPB kit documentation
• Replacement fasteners if specified by service manual × 1 — OEM specification

Preparation

1. Park on level ground, place in neutral with the transmission, engage the parking brake (if still functional), and chock the front wheels.
2. Exit ALL doors with the 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. On the 2012 Roadster the 12V auxiliary battery is located in the front trunk/forward compartment area — refer to the owner documentation for exact location and access.
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 proceeding, physically verify whether this Roadster has the original cable-operated mechanical handbrake or an aftermarket/retrofit electronic parking brake. The remainder of this procedure assumes a discrete parking brake actuator/motor assembly is present and serviceable.
7. Gather service documentation specific to the installed EPB system (OEM Tesla Roadster service manual or the aftermarket kit's instructions).
8. Raise the rear of the vehicle at the manufacturer-designated jacking points and support on jack stands. Remove the rear wheels if access requires it.

Procedure

1. 1

   Verify configuration and document baseline
   Inspect the parking brake system to confirm the location and type of the actuator/motor. Photograph all connections, cable routing, and fastener positions before disassembly. If the system is a factory mechanical cable handbrake (typical for 2012 Roadster), there is no 'motor' to replace — abort this procedure and reassess the work order.
2. 2

   Release parking brake tension
   With the vehicle safely supported and wheels chocked, release the parking brake fully. If the actuator is electronically controlled, use a compatible scan tool (or the manufacturer-specified service mode) to place the actuator in service/release position so the cables or internal screw mechanism are unloaded.
   ⚠Do not attempt to force a seized electronic actuator open mechanically — internal gears can be damaged and stored energy released unexpectedly.
3. 3

   Access the actuator location
   Remove any interior trim, center console panels, underbody covers, or rear wheel-well liners required to access the actuator. Use plastic trim tools to avoid damaging the Roadster's composite panels. Set fasteners aside in labeled containers.
4. 4

   Disconnect electrical connector
   Locate the actuator's electrical harness connector. Release the locking tab and disconnect. Inspect the connector and pins for corrosion or damage. Cap or protect the harness end to prevent contamination.
5. 5

   Disconnect parking brake cables (if cable-actuated EPB)
   If the EPB drives traditional rear cables, detach the cable ends from the actuator per the manufacturer-specified method. Note the slack adjustment position before removal so the new unit can be set to a similar baseline.
6. 6

   Remove the actuator mounting fasteners
   Support the actuator and remove its mounting fasteners from the manufacturer-specified bracket. Carefully withdraw the unit, taking note of any spacers, isolators, or alignment dowels.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)
7. 7

   Inspect the mounting area
   Clean the mounting surface and inspect the bracket for cracks, corrosion, or elongated holes. Inspect cable routing for chafing. Replace any damaged hardware with OEM-equivalent fasteners.
8. 8

   Install the new actuator
   Position the new parking brake actuator/motor onto the manufacturer-specified bracket, aligning to any locating features. Hand-start all fasteners before final torque to avoid cross-threading.
   Torque spec

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

   Reconnect cables and electrical harness
   Reattach the parking brake cables (if applicable) and seat the electrical connector until the lock engages. Verify cable routing matches the pre-removal photographs and that nothing contacts a hot, moving, or HV component.
   ⚠️Confirm no part of the harness or cable can contact orange HV cabling or HV components.
10. 10

    Initial calibration / cable tension setup
    If electronically controlled, run the actuator's service-mode calibration with a compatible scan tool per the manufacturer's procedure. If cable-tensioned, set initial slack per the service manual specification — do not over-tension.

Reassembly

1. Reinstall any underbody covers, wheel-well liners, and interior trim removed for access, ensuring all clips and fasteners are reseated.
2. Reinstall the rear wheels if removed; torque lug nuts in a star pattern.
3. Lower the vehicle to the ground.
4. Reconnect the 12V low-voltage battery.
5. Allow the vehicle's electronics to wake and self-check before operating the parking brake.

Verification

• Cycle the parking brake apply/release several times and listen for smooth, even actuator operation with no grinding or stalling.
• Confirm there are no parking brake or chassis warning indicators on the Roadster's VDS/instrument display after a full power cycle.
• With the vehicle on level ground and transmission in neutral, verify the parking brake fully holds the vehicle on a mild incline before road use.
• Inspect underneath after a short test drive to confirm no cables, harnesses, or fasteners have shifted.
• Note: while the brake system is open for service, consider whether the 2-year brake fluid replacement interval (Tesla's published recommendation) is due — if so, schedule that service.
• If any abnormal behavior persists, stop using the vehicle and consult a Tesla Roadster specialist; service documentation for this platform is limited and misdiagnosis is easy.

More procedures for this vehicle