Description
Electric lock for the rear liftgate window for Citroën C4 Picasso and Grand Picasso first series.
This Electric Rear Tailgate Window Lock is a direct-fit replacement designed for the first-generation Citroën C4 Picasso and Grand C4 Picasso. Ideal for mechanics and experienced DIY enthusiasts, the unit restores reliable locking and central‑locking operation of the rear liftgate window. Commonly sought under OEM numbers 9660403680, 8719A6 or cross-referenced codes such as 8719G8, the part is suitable for vehicles from the first series and is a frequent spare for body and electrical repairs.
Function And Typical Failures
The lock houses an electric actuator and mechanical latch that secure the rear liftgate window. It Operates Via Central Locking Or Local Switch And Converts Motor Rotation Into Latch Movement. Failures Usually Result From Water Ingress, Corrosion, Plastic Gear Wear Or Motor Burnout. Electrical Connector Corrosion And Mechanical Damage From Impacts Or Forced Closing Are Also Common Causes.
Replacement Procedure
- Disconnect The Battery Before Starting Work To Avoid Short Circuits And Protect Vehicle Electronics.
- Remove Interior Tailgate Trim Panel To Access The Lock Assembly (Retaining Clips And Screws May Be Hidden Behind Trim).
- Unplug The Electrical Connector And Detach Any Linkages Or Rods Connected To The Latch.
- Remove Fasteners Securing The Lock, Extract The Old Unit And Compare Mounting Points And Connector Type With The New Part.
- Fit The New Lock, Reconnect Linkages And Electrical Connector, Then Test Locking Function (Central Lock, Remote, And Manual Operation) Before Reassembling Trim.
- Reinstall Trim Panel And Reconnect The Battery.
Installation Recommendations
- Use Appropriate Tools (Torx/Screwdrivers, Trim Tools) And Work On A Stable Lift Or Flat Surface.
- Inspect Wiring And Connector Pins For Corrosion; Clean Or Replace As Necessary.
- Lubricate Striker And Moving Parts With Suitable Grease To Reduce Noise And Wear.
- Test All Locking Functions Before Final Reassembly To Avoid Repeating The Job.
- If Uncertain, Have Installation Done By A Professional Workshop Experienced With Citroën/Peugeot Tailgate Mechanisms.
Why This Part Fails Most Often
Exposure To Moisture And Road Salt Leads To Corrosion Of Electrical Contacts And Mechanical Components. Plastic Gears Inside The Actuator Can Wear Or Break Over Time, Especially After Many Cycles Or If The Latch Is Frequently Subjected To Impact. Motor Windings May Burn Out With Age Or Excessive Load. Preventive Maintenance Includes Regular Cleaning, Lubrication, And Ensuring Door Seals Are Intact.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C4 Picasso (First Generation), Citroën Grand C4 Picasso (First Generation)
- Product Codes: 9660403680, 8719A6
- Additional Numbers: 8719G8
Suitable For Bodyshops And Independent Mechanics Looking For A Reliable Replacement Part For Rear Tailgate Window Lock Failures On First‑Generation C4 Picasso Models. Follow The Vehicle Manufacturer’s Procedures During Removal And Installation To Ensure Correct Fit And Long Service Life.
