Description
Rear Windscreen Washer Nozzle For Citroën C4 Coupé First Generation
High-quality replacement rear windscreen washer nozzle designed for Citroën C4 Coupé (first generation). Supplied with the original Stellantis reference 6438P9, this washer jet restores correct spray pattern and coverage to the rear glass, improving visibility and safety. Ideal for professional workshops and DIY mechanics who need a direct-fit part that matches the factory geometry and mounting points. The compact plastic design is made to mate with the original washer hose and tailgate trim, providing a straightforward swap without modification.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Citroën C4 Coupé (First Generation)
- Product Codes: 6438P9
- Additional Numbers: NFP
Function And Benefits
The rear washer nozzle atomizes washer fluid onto the rear glass to ensure a wide, even spray that clears dirt and road film. A correctly functioning nozzle is critical for rear visibility in wet or dirty conditions and complements the rear wiper system. Replacing a worn or damaged nozzle restores spray angle and flow rate, reducing streaking and improving washer efficiency.
Common Failure Causes
- Clogging From Dirt And Debris: Mineral deposits or road grime block the nozzle outlet and internal channels.
- Plastic Degradation: UV exposure, temperature cycles and age can crack or deform the plastic body, causing leaks or misalignment.
- Mechanical Damage: Impacts from loading, accidental knocks or tailgate damage can break the nozzle or its mounting tabs.
- Hose Disconnection Or Kinking: A disconnected or pinched washer hose reduces or stops fluid delivery.
Replacement Interval
There is no fixed service interval for washer nozzles. In practice they remain functional for several years, but you should inspect them during routine bodywork or glass maintenance and replace them when spray pattern deteriorates, leaking occurs or physical damage is present. Expect typical lifespans in the multi-year range depending on climate and usage.
Installation Recommendations
- Tools Needed: Trim removal tool, flat screwdriver, pliers, gloves and a clean cloth.
- Procedure Overview: Open the tailgate and remove the interior trim panel to access the nozzle from inside. Depress the retaining clip and push the old nozzle out from the inside, or carefully unclip it from the tailgate glass depending on the mounting style. Disconnect the washer hose, connect it to the new nozzle, and push the new nozzle into the mounting opening until it clicks into place. Refit the interior trim.
- Testing: Before reassembling all trim, top up the washer reservoir, operate the rear washer to confirm correct spray pattern and check for leaks at the hose connection. Adjust nozzle orientation if minor alignment is needed.
- Best Practice: Clean the washer hose and nozzle inlet to remove debris before refitting. Replace brittle or cracked hoses to avoid future leaks.
Why Replace The Nozzle
Technicians commonly replace the rear washer nozzle when the spray becomes uneven, the jet only dribbles or fluid leaks around the nozzle base. Replacement is low-cost, quick to perform and often solves visibility complaints without replacing larger components like the pump or wiper motor.
Notes For Professionals
This part is supplied to match the original fitment for Citroën C4 Coupé first generation vehicles carrying the Stellantis part code 6438P9. Use standard workshop safety procedures: isolate battery if working near powered components and take care when removing interior trim to avoid breaking clips.
