Description
Electric window motor for the left front window for PEUGEOT 407 vehicles. With electric folding-in function. Driver’s door.
Direct-fit replacement motor for the left front (driver’s door) window regulator on Peugeot 407. Designed for professional workshops and DIY mechanics who need a reliable unit to restore smooth, quiet window operation. Compatible with common reference numbers used in parts searches (see Technical Information). The motor supplies consistent torque for lifting and lowering the glass and is suitable for use where the original unit shows signs of wear, slow operation, or intermittent electrical faults. Searching by part number such as 9646594580 or 9221Z1 increases the chance to find the correct replacement quickly.
Technical Information
- Manufacturer: Stellantis / Peugeot
- Model: Peugeot 407
- Product Codes: 9646594580, 9221Z1
- Other Numbers: 1137328125, NFP
Function And Application
The motor drives the window regulator mechanism to raise and lower the left front glass. It integrates with the vehicle’s electrical system and the regulator gearbox to provide the necessary movement and includes the electric folding-in function where fitted on relevant vehicle configurations. Intended for the driver’s door of Peugeot 407 models. Use this unit to replace failed or noisy motors and to recover precise window positioning and smooth operation.
Installation Recommendations
- Disconnect the negative battery terminal before starting to prevent short circuits and accidental operation.
- Remove the interior door card carefully, releasing clips and screws; keep fasteners organized for reassembly.
- Lower the glass to a position where you can access the regulator and motor fixing points, or support the glass securely before removing the motor.
- Disconnect the electrical connector to the motor, then unbolt and remove the motor from the regulator assembly.
- Inspect the regulator tracks and guide rollers; clean and lubricate sliding surfaces with appropriate grease before fitting the new motor.
- Fit the replacement motor, reconnect the electrical connector and temporarily reconnect the battery to test full travel and correct motor function before reassembling the door trim.
- After confirming correct operation, secure all fasteners to their original positions and torque where specified by the vehicle manufacturer, then refit the door card.
- Final check: cycle the window several times to ensure smooth movement and correct alignment.
Why This Part Most Often Fails
- Wear Of Internal Brushes And Commutator: Over time, brush wear reduces motor performance and can cause intermittent operation or complete failure.
- Gear And Spline Wear: Mechanical gears or splines within the motor/regulator can strip or wear, leading to slipping or inability to move the glass.
- Water Ingress And Corrosion: Moisture entering the door can corrode electrical contacts and motor internals, especially on older seals or damaged door cavities.
- Regulator Binding Or Damaged Cables: If the regulator becomes stiff, bent, or the cables fray, the motor is overloaded and will fail sooner.
- Connector And Wiring Issues: Corroded or loose connectors and broken wires cause intermittent faults and can damage the motor if voltage spikes occur.
- Lack Of Lubrication: Dry tracks and guides increase friction and accelerate wear on both the motor and regulator components.
Practical Tips
- When replacing the motor, check the condition of the regulator and guide rails; replacing worn items at the same time avoids repeat repairs.
- Keep replacement parts and reference numbers (9646594580, 9221Z1, 1137328125) at hand when ordering to ensure a fast match.
- Regularly lubricate window tracks and seals to extend the life of the motor and regulator.
