Product Specification

Rear Right-Hand (RH) Door Latch for 2023+ Tesla Model 3 | 1738947-01-D (CFN Brand)

Core Functions

1. Synchronized Locking & Unlocking
   Works in tandem with the Model 3’s Body Control Module (BCM) to execute locking/unlocking commands from the key fob, in-car touchscreen, or exterior door handle. When locked, it engages the stainless steel striker pin (on the rear right door pillar) to lock the door firmly—preventing accidental opening during driving, cornering, or rough roads. When unlocked, it releases the striker smoothly, ensuring the door opens with minimal force for easy access.
2. Smooth Opening/Closing & Status Feedback
   Features a precision mechanical linkage and high-response electronic solenoid that coordinate with interior/exterior handles: pressing the exterior handle (or pulling the interior handle) triggers the solenoid to disengage the locking pawl, enabling jolt-free door opening. It also includes a “half-latch” function—if the door is not fully closed, the latch temporarily catches the striker (stopping the door from swinging open) and sends a signal to the dashboard, alerting the driver to “Close Rear Right Door” for safety.
3. Crash & Emergency Protection
   Meets Tesla’s strict safety standards for accident and emergency scenarios:

• Crash Auto-Lock: Automatically locks the door during a collision to prevent door ejection and protect occupants;
• Mechanical Emergency Release: Retains a manual pull-tab linkage (accessible via the rear right door’s emergency panel) to open the door if the electrical system fails (e.g., power outage after an accident);
• Child Safety Lock Compatibility: Integrates with the rear door’s manual child safety lock—engaging the lock disables the interior handle, preventing children from accidentally opening the door while the vehicle is moving.

Durable Construction & Technical Details

• Mechanical Frame: The main latch body is made of glass-fiber reinforced PA66 plastic (tensile strength ≥80MPa) to resist impact and deformation; critical moving parts (locking pawl, ratchet) use hardened steel (hardness ≥HRC 50) to reduce wear—supporting over 50,000 opening/closing cycles (matching OEM durability).
• Electronic Components: The built-in solenoid uses copper coils (insulation class B, withstands 130°C) for stable electrical performance; the Hall-effect position sensor (detects locked/unlocked/half-closed status) has an accuracy of ≤1%, ensuring real-time feedback to the BCM (avoiding false dashboard alerts).
• Environmental Sealing: Equipped with IP6K7-rated rubber gaskets to block water, dust, and car wash chemicals from entering the internal mechanism—preventing rust, short circuits, or solenoid failure. It also tolerates extreme temperatures (-40°C to 85°C), suitable for hot summers, cold winters, or coastal environments (resisting salt corrosion).

Installation 要点

1. Vehicle Preparation: Power off the vehicle; open the rear right door and remove the inner door panel (use a trim tool to detach plastic clips, then disconnect the window switch wiring harness and interior handle cables—note cable positions to avoid misconnection).
2. Old Latch Removal: Locate the old latch (mounted on the door’s inner metal frame, secured by 3 x 10mm bolts). Disconnect the electrical connector (for solenoid and sensor) and mechanical cables (linked to interior/exterior handles). Use a 10mm socket to remove the 3 bolts, then pull the old latch away (avoid twisting cables).
3. Pre-Installation Check: Clean the door frame’s mounting surface with a dry cloth; inspect the striker pin (on the door pillar) for looseness or rust—tighten the striker’s bolts (if loose) or replace the striker (if corroded) to ensure proper latch engagement.
4. New Latch Installation: Align 1738947-01-D with the door frame’s mounting holes; reconnect the electrical connector and mechanical cables (ensure cables are routed smoothly, no kinks). Hand-tighten the 3 x 10mm bolts to prevent cross-threading.
5. Torque Fastening: Use a torque wrench to tighten bolts to 8±0.5 Nm (per Tesla’s 2023+ Model 3 specs)—over-tightening may crack the latch’s plastic body, affecting performance.
6. Function Testing: Reinstall the inner door panel, power on the vehicle, and test:
   • Lock/unlock via key fob and touchscreen (confirm smooth engagement);
   • Open/close the door 5–10 times (check for jamming, ensure “half-latch” warning works);
   • Engage the child safety lock (verify interior handle is disabled);
   • Clear BCM error codes (via Tesla diagnostic tool) to ensure full electrical synchronization.

Note: This part is rear right-hand (RH) specific—do not interchange with front door latches or rear left-hand (LH) latches (e.g., 1738948-01-D). Using non-compatible latches may cause door malfunctions or trigger safety system errors.