This replacement door lock is designed for the left front (driver’s) door on selected Citroën and Peugeot models and is identified by the common part code 9135H8. Built to operate within the vehicle’s central locking system, the unit actuates the latch and secures the door when locking and unlocking. The compact design and oval electrical connector match factory-style fittings for straightforward installation in compatible vehicles.

Key Benefits

• Direct Fit For Multiple Models: Fits Citroën Berlingo, Citroën Xantia, Peugeot Partner I and II, Peugeot 406.
• OE-Style Connector: Oval connector for easy plug-and-play replacement on matching harnesses.
• Mechanic-Friendly Installation: Accessible removal and installation without specialized dealership equipment.
• Improves Lock Reliability: Replaces worn or non-functioning locks to restore secure door closure and central locking operation.

How It Works

The unit contains a small electric actuator and mechanical latch which receive an electrical signal from the central locking module or the door switch. When activated, the actuator moves the internal mechanism to lock or unlock the door and engages the latch to secure the door shut. Proper electrical connection and mechanical alignment are required for smooth operation.

Installation Recommendations

• Disconnect The Battery Or Disable The Central Locking System Before Starting To Avoid Short Circuits.
• Remove The Interior Door Trim Carefully To Access The Locking Mechanism; Keep Fasteners Organized.
• Disconnect The Oval Electrical Connector And Any Linkage Rods Or Clips; Note Their Positions For Reassembly.
• Unbolt The Lock Unit From The Door, Transfer Any Needed Linkages, And Fit The Replacement In Reverse Order.
• Check Electrical Connector For Corrosion And Clean Contacts If Needed; Apply Dielectric Grease For Protection.
• Test Locking And Unlocking Function Several Times Before Refitting The Door Panel; Ensure Proper Latch Engagement And Adjust Linkages If Necessary.
• Use Basic Tools: Screwdrivers, Torx Or Socket Set As Required By Model, Pliers For Clips, And A Multimeter To Verify Power If Needed.

Most Common Failure Causes

• Water Ingress And Corrosion: Moisture Reaching The Mechanism Causes Corrosion Of Contacts Or Linkages.
• Worn Plastic Gears Or Internal Components: Mechanical Wear Leads To Slipping Or Complete Loss Of Actuation.
• Electric Motor Or Actuator Burnout: Repeated Use Over Time Can Cause The Small Motor To Fail.
• Damaged Linkage Or Bent Rods: Physical Impact Or Fatigue Can Prevent The Latch From Moving Freely.
• Poor Electrical Connection: Corroded Or Loose Connector Contacts Lead To Intermittent Operation.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën Berlingo; Citroën Xantia; Peugeot Partner I; Peugeot Partner II; Peugeot 406
• Product Codes: 9135H8
• Additional Numbers: No Additional Numbers Provided

Suitable For Auto Mechanics And Skilled DIYers: This part is intended for professional fitment or experienced home mechanics comfortable with removing door panels and handling electrical connectors. Replace the unit when you notice intermittent locking, loud grinding noises from the door, or complete failure to lock/unlock from the central locking system or key fob.

Always Verify Physical Connector Shape And Mounting Points Against The Existing Unit Before Purchase—This Part Uses An Oval Connector As Shown In The Second Photo.

Product Overview

This electric central locking actuator is designed for the left front (driver’s) door of selected Citroën and Peugeot models. It replaces the door lock mechanism responsible for locking and unlocking via the vehicle’s central locking system. Commonly searched by product code 9135H8, this unit features a rectangular two-row electrical connector and is suitable for workshops and DIY mechanics who need a direct-fit replacement part.

Applications

Fits the following models (examples): Citroën Berlingo, Citroën Xantia, Peugeot Partner I, Peugeot Partner II, Peugeot 406. Intended for left front (driver) door central locking application. Always verify physical connector shape and mounting points against the existing part before installation.

Technical Information

• Manufacturer: Stellantis / Citroën / Peugeot
• Model(s): Berlingo, Xantia, Partner I, Partner II, 406
• Product Codes: 9135H8
• Additional Numbers: No additional OEM numbers provided

Installation Recommendations

• Disconnect the negative battery terminal before starting to avoid short circuits and accidental airbag deployment.
• Remove the door trim panel using appropriate trim tools to avoid damaging clips.
• Disconnect the rectangular two-row electrical connector and any rod/linkage from the actuator. Note the positions of retaining clips and washers.
• Unscrew the actuator mounting bolts and remove the old unit. Compare the new actuator to the old one to ensure identical connector orientation and mounting points.
• Fit the new actuator, reconnect linkages and the electrical connector, then loosely fit mounting bolts. Operate the locking mechanism by hand or using the vehicle controls to confirm correct alignment, then tighten bolts to the manufacturer’s torque specifications.
• Reinstall door trim, reconnect the battery, and test central locking from both remote and interior switches. Check that the door latches properly and that there is no unusual noise or binding.

Most Common Failure Causes

Actuators of this type typically fail because of water ingress and corrosion of internal components or connectors, worn electric motor brushes, broken plastic gears inside the actuator, or failed micro-switches that detect lock position. Mechanical wear on linkages and rod clips or damage from slammed doors can also lead to malfunction. Vehicles regularly exposed to moisture, road salt, or heavy use are more prone to premature failure.

Notes For Mechanics and DIYers

When replacing the actuator, inspect door linkages, latches, and the electrical connector for corrosion or play. Lubricate mechanical joints with suitable grease and ensure the wiring harness is intact. This part is intended as a direct replacement for the left front driver’s door central locking function — confirm connector type (rectangular two-row) and mounting arrangement before ordering.