Description
Electric Central Lock – Left Front Door For Peugeot 307. Driver’s Door.
High-quality replacement electric door lock for the left front (driver’s) door of the Peugeot 307. Designed for professional workshops and experienced DIYers, this unit restores reliable central locking function, smooth door latching and secure closure. Commonly searched by part numbers 9135N4 and 9135Z0, the lock is suitable for vehicles using the corresponding Stellantis/Peugeot door hardware.
Features And Function
The unit performs the mechanical locking and unlocking action as part of the vehicle’s central locking system. It contains the actuator mechanism that moves the latch and linkages when a remote, key or interior switch is used. Proper operation ensures the door locks securely, the handle returns correctly and the vehicle’s central locking logic detects the door as closed.
When And Why It Fails
Door locks on Peugeot 307 models typically fail due to a combination of age, mechanical wear and environmental exposure. Common causes include worn plastic gears or worm gears inside the actuator, motor burnout, corrosion from moisture ingress, seized linkages, or damage from impact. Symptoms are intermittent locking/unlocking, noisy operation, inability to lock or unlock from the remote or handle, and the door not latching correctly.
Replacement And Installation
Replacement is straightforward for a trained mechanic or competent DIYer with basic tools. Typical procedure:
- Disconnect the vehicle battery before starting to avoid short circuits and prevent damage to electrical components.
- Remove the interior door trim carefully to access the lock assembly and linkage rods.
- Disconnect the electrical connector and detach linkage rods from the lock mechanism (note positions to ensure correct reassembly).
- Unbolt and remove the old lock unit from the door shell, then install the replacement in the same orientation.
- Reconnect rods and wiring, secure the lock, and reattach the door trim.
- Reconnect the battery and test locking/unlocking operation from the key, remote and interior switch. Check mechanical movement of the latch and adjust linkage or striker alignment if necessary.
Use correct trim tools to avoid damaging clips and panels. Lubricate latch points with appropriate lubricant and ensure drain holes are clear to reduce future moisture-related failures.
Technical Information
- Manufacturer: Stellantis / Peugeot
- Model: Peugeot 307 (Left Front / Driver’s Door)
- Product Codes: 9135N4
- Other Numbers: 9135Z0
Installation Recommendations
Always disconnect the battery before removing or installing door electrical components. Keep electrical connectors dry and free of corrosion. Verify that all linkage clips and fasteners are secured and that the door closes and locks smoothly before returning the vehicle to service. If door alignment or striker adjustment is required, correct that before final assembly to avoid undue stress on the new lock.
Common Failure Causes
Most failures result from worn internal gears or motor, water ingress and corrosion, broken or fatigued linkage rods/clips, or mechanical impact to the door. Preventive measures include regular lubrication of latch components and ensuring door seals and drainage are functioning to reduce moisture exposure.
