The Rear Wiper Mechanism for the Peugeot 407 SW is a direct-fit solution designed to restore reliable rear-window wiping and park functions. This unit includes the mechanical gearbox, bearing and microswitch assembly; the bearing and microswitch on this particular item are functional. Ideal for professional workshops and experienced DIYers who look up parts by OEM number: the mechanism matches common Peugeot/Stellantis product codes and replaces worn or noisy rear wiper linkages and motors on estate models.

Key Benefits

Reliable Mechanical Replacement: Restores correct sweep and park position of the rear wiper arm. Improved Visibility: Eliminates streaking and erratic wiping caused by worn gears or seized pivots.OEM Compatibility: Frequently Searched By Part Number For Fast Identification In Repair Shops And Online Catalogs.

Fitment

• Peugeot 407 SW (Estate)

Technical Information

• Manufacturer: Stellantis (Peugeot/Citroën)
• Model: Peugeot 407 SW
• Product Codes: 9651000780, 9637858580, 6405Z1
• Additional Numbers: 6405K3, 6405K4, 6405K5, 450343, 6936C2

Function And Common Faults

The rear wiper mechanism transfers rotary motion from the motor into the sweep movement of the wiper arm and contains internal gears, bearings and a microswitch that detects park position. Typical failure modes include gear wear or stripping, bearing seizure from corrosion or contamination, water ingress into the motor/gearbox and failure of the park microswitch. When these components deteriorate, symptoms include noisy operation, incomplete sweep, wiper arm not parking correctly, or complete loss of rear wiper movement.

Replacement Procedure (Overview)

Replacement is straightforward for experienced technicians and competent DIYers with basic workshop tools:

• Remove The Rear Wiper Arm: Pry off the wiper cap, remove the retaining nut and lift the arm free.
• Remove Tailgate Trim: Open Tailgate And Carefully Remove Interior Trim Panel To Access The Mechanism (Retain Clips And Fasteners).
• Disconnect Electrical Connector: Unplug The Wiper Motor Connector And Any Linked Harnesses.
• Unbolt The Mechanism: Unscrew Fasteners Holding The Gearbox/Mounting Plate, Free The Unit From The Tailgate.
• Install New Unit: Position The Replacement Mechanism, Tighten Fasteners To Manufacturer Torque Where Available, Reconnect Electrical Connector.
• Refit Trim And Wiper Arm: Reinstall Interior Trim, Refit Wiper Arm To Correct Park Position And Secure Nut.
• Function Test: Cycle The Rear Wiper To Confirm Sweep Range, Park Position And Absence Of Unusual Noise.

Installation Recommendations

• Disconnect The Battery Before Starting Work To Avoid Short Circuits And Unintended Motor Operation.
• Protect Interior Trim Clips And Fasteners During Removal To Prevent Breakage.
• Check The Wiper Arm Splines And Replace The Arm Or Washer If Excessive Play Is Found.
• Ensure The Mechanism Is Correctly Aligned So The Wiper Parks In The Designated Position.
• Apply Dielectric Grease To Electrical Connectors If Corrosion Is Present; Lubricate Pivot Points With Suitable Grease During Reassembly.

Why The Part Most Commonly Fails

Rear wiper mechanisms are exposed to weather, road salt and moisture, which promote corrosion and contamination. Repeated mechanical load and occasional shock (ice, blockage) accelerate wear of plastic or metal gears and bearings. Water ingress can short the motor or cause the park microswitch to fail. Lack Of Lubrication And Physical Damage From Snow/Ice Are Frequent Causes Of Premature Failure.

Notes For Buyers

Searches For This Part Often Use The OEM Numbers Listed Above; Entering These Codes In Online Catalogs Or Workshop Systems Will Help Confirm Fitment. This Unit Is Suited For Professional Replacement Or Confident DIY Installation By Someone Familiar With Tailgate Trim Removal And Basic Electrical Disconnection.

Product Overview

This used rear wiper mechanism is suitable for Citroën C5 estate models up to 2007 and carries original Stellantis/Citroën part references. The unit drives and guides the rear wiper arm, converting the motor output into the oscillating movement that keeps the rear window clear. Bearing and built-in microswitch are reported functional, which reduces the amount of additional work required at installation.

Key Features & Benefits

• Direct Fit For Specified Citroën C5 Estate Models — simplifies replacement for workshops and DIY mechanics.
• Includes Functional Bearing And Microswitch — lowers the chance of immediate secondary failures.
• Supplies Same Mechanical Interface As Original Equipment — no modifications typically required.
• Commonly Searched By Part Numbers (Good For SEO): 9651000780, 9637858580, 6405K2, 6405K3, 6405K4, 6405K5, 6936C2.

Function

The mechanism converts rotational motion from the rear wiper motor into the back-and-forth sweep of the wiper arm. The integrated bearing supports the pivot and the microswitch (park switch) signals the wiper control when the arm has returned to its rest position. A correctly functioning mechanism ensures smooth, noise-free wiping and reliable park detection.

Technical Information

• Manufacturer: Stellantis / Citroën
• Model: Citroën C5 Estate (Up To 2007)
• Product Codes: 9651000780, 9637858580
• Other Numbers: 6405K2, 6405K3, 6405K4, 6405K5, 6936C2

Compatibility

Designed For Rear-Wiper Assemblies Used On Citroën C5 Estate Models Produced Until 2007. Part Numbers Listed Above Are Commonly Referenced When Searching For Replacements; Confirm Visual Match With Existing Unit Before Installation.

Common Failure Modes

• Water Ingress And Corrosion — Causes Seized Pivot, Noisy Operation, Or Electrical Shorting.
• Worn Or Damaged Plastic Gears — Results In Slipping, Intermittent Movement Or Complete Loss Of Motion.
• Failing Bearing — Produces Excessive Play And Noise, Alters Wiper Sweep Geometry.
• Malfuctioning Microswitch (Park Switch) — Leads To Incorrect Park Positioning Or Wiper Not Returning To Rest.

Replacement Guide

Basic Steps For Removal And Fitment (Typical Procedure):

• Remove The Rear Wiper Arm: Pry Off The Protective Cap, Unscrew The Retaining Nut, And Withdraw The Arm From The Spindle.
• Remove Tailgate Trim: Open Tailgate And Carefully Remove Interior Trim To Access The Mechanism. Keep Fasteners And Clips Organized.
• Disconnect Electrical Connector: Unplug The Wiper Motor Connector To Avoid Short Circuits.
• Unbolt The Mechanism: Remove Mounting Bolts/Screws Securing The Assembly To The Tailgate And Extract The Unit.
• Fit New Mechanism: Position The Replacement, Tighten Fasteners To Manufacturer Torque Where Available, Reconnect Electrical Connector, Refit Trim And Wiper Arm. Check Wiper Park Position And Sweep.

Installation Recommendations

• Wear Gloves And Eye Protection. Handle Plastic Trim Clips Carefully To Avoid Breakage.
• Before Reassembly, Check The Tailgate Sealing Areas And Clean Any Corrosion To Prevent Future Water Ingress.
• Verify Electrical Connector Pins Are Clean And Free Of Corrosion. Use Dielectric Grease If Appropriate.
• After Installation, Cycle The Wiper Several Times To Confirm Correct Park Position And Smooth Operation. Adjust Wiper Arm Position If Required.
• Disconnect The Battery If Working Near Multiple Electrical Systems For Added Safety, And Follow Standard Workshop Procedures.

Why This Part Most Often Fails

Rear wiper mechanisms are exposed to weather and road contaminants. Water ingress and salt accelerate corrosion of metal parts and degradation of grease, while UV and age can embrittle plastic gears. Repeated loading from frozen or obstructed wipers increases mechanical stress on the gearbox and bearings. The microswitch may wear out from repeated cycles or fail due to moisture and corrosion.

Notes For Professionals And DIYers

This unit Is Suitable For Mechanics And Competent DIYers. Always Confirm Visual Fit And Part Numbers Before Installation. If The Wiper Motor Or Electrical System Shows Related Faults, Diagnose Those Items In Parallel To Prevent Repeat Failures.