Description
Electric motor for the front driver’s window regulator. For CITROËN C8 and PEUGEOT 807 vehicles.
This high-quality window lift motor is designed for the left front (driver’s side) door of Citroën C8 and Peugeot 807 models. Supplied with original part references commonly searched by mechanics and DIY enthusiasts (1400794780, 9221AG), it restores reliable up-and-down movement of the glass and integrates with the vehicle’s existing regulator assembly. Ideal for garages and home repairs where quick, durable replacement of a failed window motor is required.
Technical information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C8, Peugeot 807
- Product codes: 1400794780, 9221AG
- Other numbers: N/A
Function and importance
The unit provides the electrical drive to raise and lower the driver’s front window via the door regulator. It converts electrical energy from the window switch into rotational motion that drives the regulator gears or cable mechanism. A correctly functioning motor is essential for weather sealing, occupant comfort and vehicle security.
Common causes of failure
- Wear of internal brushes and commutator from long-term use.
- Gear or plastic drive wear/stripping inside the motor or regulator assembly.
- Water ingress and corrosion inside the door, causing electrical shorting or seized components.
- Overload caused by a binding or damaged regulator or misaligned glass.
- Intermittent electrical contacts or connector corrosion.
Installation recommendations
- Disconnect the negative battery terminal before starting work to avoid short circuits and unintended window movement.
- Remove the door trim and moisture barrier carefully to access the regulator and motor. Keep clips and fasteners organized for reassembly.
- Note the window glass position and support the glass (tape or suction cup) before detaching it from the regulator to prevent dropping or misalignment.
- Disconnect the electrical connector and remove the motor mounting bolts. In many cases the motor and regulator are bolted together; inspect both components and replace regulator if damaged.
- Fit the new motor, reattach the glass to the regulator, reconnect the electrical plug and test the window operation before reassembling the door panel.
- Check for smooth travel and listen for unusual noises; adjust glass alignment if necessary. Use manufacturer-recommended bolts and torque values where available.
Practical tips for mechanics and DIYers
When replacing the motor, inspect the regulator track and rollers for wear—replacing a worn regulator at the same time prevents premature failure of the new motor. Protect the door cavity from moisture ingress after reassembly and ensure door seals are in good condition. Keep the original product codes (1400794780, 9221AG) handy when ordering replacement parts to speed up sourcing and ensure correct fitment.
If you need a durable replacement for a failing or non-functioning left front window motor on Citroën C8 or Peugeot 807, this unit provides a direct-match option that simplifies repair and gets the vehicle back into service quickly.
