This original-style rear door window switch is designed for Citroën C4 Picasso and Grand Picasso (first generation). Ideal for professional workshops and DIY mechanics, the switch restores reliable control of the rear electric window and replaces worn or faulty original units. Commonly searched by part numbers, this unit fits vehicles that use the following product codes and can save time during diagnostics and repairs.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C4 Picasso, Citroën Grand Picasso (First Generation)
• Product Codes: 96639378ZD, 96542245XT, 8153H3
• Additional Numbers: 6554YJ, 6554yy

Function And Application

The switch provides the user interface for operating the rear door electric window motor. It completes and interrupts the window motor circuit when pressed, sending the command to the regulator to raise or lower the glass. It is a direct replacement part for rear door applications on compatible Citroën C4 Picasso models and integrates into the original door connector harness.

Replacement Frequency And Typical Failure Modes

There is no fixed replacement interval; actual lifespan depends on use and environment. Common causes of failure include worn electrical contacts from prolonged use, moisture ingress or liquid spills inside the door, corrosion of switch contacts or connector pins, and mechanical damage to the actuator or switch housing. Symptoms typically include intermittent operation, one-direction operation only, or complete loss of control for the rear window.

Installation Recommendations

Recommended for both professional technicians and experienced DIYers. Typical replacement procedure:

• Disconnect The Battery Before Starting To Avoid Short Circuits And Potential Damage To Electrical Components.
• Carefully Remove The Interior Door Trim Using Trim Removal Tools To Avoid Breaking Clips.
• Locate And Release The Retaining Clips/Screws Holding The Switch Module.
• Unplug The Electrical Connector From The Switch — Inspect Connector Pins For Corrosion Or Damage.
• Install The New Switch, Reconnect The Connector And Test Window Operation Before Reassembling Door Trim.
• Reassemble The Door Trim Making Sure All Clips And Fasteners Are Properly Engaged.

Use Basic Tools: Trim Pry Tools, Phillips/Flat Screwdriver, Torx (if applicable), And Needle-Nose Pliers. After Installation, Verify Smooth Window Movement And Confirm There Are No New Noises Or Binding From The Regulator.

Why Choose This Part

Replacing a faulty switch restores driver control and passenger convenience, prevents further wear on the window regulator and motor caused by improper operation, and avoids potential safety issues with stuck windows. The unit is listed under common OEM codes, making it easy to find and fit on vehicles that use these part numbers.

Common Tips

• Inspect Wiring Harness For Damage While The Door Panel Is Removed.
• Clean Connector Contact Points If Corrosion Is Present Before Installing The New Switch.
• Test Both Directions Of Window Travel After Installation To Confirm Correct Wiring And Operation.

Order By Part Number To Speed Up Search And Confirm Fitment: 96639378ZD, 96542245XT, 8153H3, 6554YJ.