Rear Wiper Motor Valeo Citroën C5 I II Estate 9638335780 6405K1

Description

Rear window wiper motor for CITROEN C5 I II station wagons

Part description

The offered part is a Valeo rear wiper motor intended for the Citroën C5 I/II in the station wagon version. It serves to drive the rear wiper mechanism and ensures smooth operation of the rear window wiper. If you are dealing with a malfunctioning rear wiper, intermittent operation or the motor just “buzzing” without moving the arm, replacing the wiper motor is usually a quick and effective solution.

For correct identification, we recommend following the product numbers listed below.

Technical information

• Manufacturer: Valeo
• Model: Citroën C5 I II station wagon
• Other numbers: 03, 54904512, 6405K1, NFP

Product codes

• Product codes: 9638335780, 6405K1, 54904512, 03

Installation recommendations

Generally/typically for the rear wiper motor, the exact procedure may vary depending on the specific car design and type of mechanism attachment. Below is a practical one-size-fits-all procedure for replacing this type of part.

1) Before assembly (checks of used part)

• Compare the part numbers (eg 9638335780, 6405K1) with the old part and the label/marking on the part.
• Check the connector (shape, number of pins, securing) and overall condition of the cable connection.
• Inspect the motor shaft/outlet and mounting: they must not be cracked, squeezed or significantly corroded.
• If the original fault could have been in the mechanism (stiff tie rod, baked-in bearing), check the free movement of the mechanical parts – the new motor should not be installed in a “stuck” mechanism.

2) Necessary tools and materials (in general)

• Basic set of keys and sockets, ratchet
• Screwdrivers / plastic crowbar for removing upholstery
• Contact cleaner (as needed), cloth
• Protective gloves

3) Step-by-step assembly procedure

1. Turn off the ignition and disconnect the battery for safety.
2. Provide access to the rear wiper motor (typically removing the inner trim of the fifth door).
3. Disconnect the motor electrical connector and check that the pins are not oxidized or loose.
4. Loosen the motor/mechanism fasteners (bolts/nuts depending on design).
5. Remove the old motor carefully – do not damage the wiring or grommets.
6. Clean the mating surfaces and check the condition of the seals/grommets at the passage (if included in the assembly).
7. Place the new motor in the correct position and screw the mounting.
8. Connect the electrical connector and make sure it clicks/locks properly.
9. Before final assembly of the lining, briefly test the function (after connecting the battery): the motor must run smoothly without unusual noises.
10. If all is well, disconnect the battery again (as needed), finish installing the trim and seat everything carefully.
11. Connect battery, do final rear wiper test.

• 4) Post-assembly checks and functional test verification

  • Verify regular operation and return to rest position (wiper parking).
  • Check for rubbing, clicking and engine overheating.
  • After the first cycles, visually check the fit and connector again.

  5) The most common assembly mistakes + how to avoid them

  • Part replacement by appearance – always compare product numbers (9638335780 / 6405K1).
  • Damage to connector/pins when disconnecting – use proper unlocking procedure and possibly contact cleaner.
  • Not tightened or poorly seated mounting – can cause vibrations, noise and erratic operation.

  Reasons why the part is damaged

  • Stiffened or dirty wiper mechanism (increased resistance → motor overload).
  • Moisture ingress into the motor/connector space and subsequent corrosion of the contacts.
  • Mechanical stress (backlash, vibrations, damaged attachment, shocks with a frozen wiper).
  • Electrical problems in the power supply (oxidation, transition resistances in the connectors).