Keyless Door Lock Actuator – Front Right – Land Rover Discovery Mk4 – EJ3A21812CC

This direct-fit door lock actuator (door lock solenoid / door lock motor) restores reliable central locking and door entry on the Land Rover Discovery MK4. Built to OEM specification and matching part numbers EJ3A-21812-CA, EJ3A-21812-AC, LR091359 and EJ3A21812CC. Also fits equivalent Jaguar models.

Common signs of failure

A failing door lock actuator typically causes one door to stop responding to the key fob or interior lock switch while the others still work. You'll often hear a brief clicking or whirring from inside the door card when locking is attempted, sometimes followed by the central locking giving up after a few seconds. Common related fault codes include B22F0, B22F1 and B22F2 on VAG cars. On vehicles with keyless entry, the dashboard may display a 'Doors not locked' warning.

Fitment notes

Direct-fit replacement actuator, no diagnostic coding required. Door card removal is necessary to access the actuator — typically secured with two or three Torx bolts to the door frame. Disconnect the wiring harness and lock rods before swapping. Most actuators fail in the gearing inside the motor housing, so a clean OEM-spec replacement restores full operation. Standard 4 pin connector. Position: Front, Right.

Frequently asked questions

Why does my central locking only work sometimes?

Intermittent operation is the classic sign of a worn door lock actuator. The plastic gears inside the actuator wear down and slip, working when warm but failing when cold or after the car's been sat. Replacement is the only reliable fix.

Can I lubricate it instead of replacing?

Sometimes a stuck actuator can be temporarily revived with silicone grease, but worn internal gears cannot be repaired. If the fault has returned more than once, replace the unit.

Do I need to programme the new actuator?

No — door lock actuators are passive components controlled by the body control module. Fit, reconnect, and test.