Description
3rd Rear Brake Light With Washer Nozzle For Citroën C1, Peugeot 107 And Toyota Aygo. This Is A Used Part; The Rubber Seal May Leak, In Which Case It Is Necessary To Seal It With Silicone.
This third (centre high‑mount) brake light assembly with integrated rear washer nozzle is an original Stellantis unit suitable for Citroën C1, Peugeot 107 and Toyota Aygo models. Supplied as a used part (OEM numbers 1606372780 / 6351W4), it offers direct fitment into the tailgate and restores rear signaling and rear‑window washing functions. Ideal for professional garages and experienced DIYers who want a cost‑effective replacement while keeping original equipment standards.
Technical Information
- Manufacturer: Stellantis
- Model: Citroën C1, Peugeot 107, Toyota Aygo
- Product Codes: 1606372780, 6351W4
- Other Numbers: N/A
Function
The unit combines the centre high‑mount stop lamp (CHMSL) with a rear‑window washer nozzle. Its primary role is to provide additional braking visibility to following traffic and to deliver washer fluid to the rear glass for improved visibility when reversing or in poor weather.
Common Faults And Failure Modes
- Water Ingress: The most frequent issue is leakage around the rubber seal, which allows moisture into the lamp housing and can cause corrosion, electrical faults or lens fogging.
- Seal Deterioration: Rubber gaskets harden and crack with age and UV exposure, leading to dripping or continuous leaks.
- Electrical Problems: Corroded contacts or wiring can result from prolonged moisture exposure, causing intermittent or complete lamp failure.
- Nozzle Blockage Or Damage: The washer nozzle can clog with dirt or be physically damaged, preventing proper fluid spray.
- Impact Damage: Tailgate impacts or minor collisions can crack the lens or deform the mounting points.
Replacement And Installation
- Park the vehicle on a flat surface and open the tailgate. For safety, disconnect the negative battery terminal if you will be handling electrical connectors for an extended time.
- Remove the inner tailgate trim to access the lamp: unclip retainers and/or remove screws as required by the specific vehicle model.
- Disconnect the electrical connector for the lamp and the washer fluid hose from the nozzle. Be careful with clips; use trim tools to avoid damage to the panel.
- Remove the mounting screws or nuts securing the lamp assembly, then withdraw the unit from the tailgate aperture.
- Fit the replacement unit, ensuring the mating surface is clean and the rubber seal sits correctly. If the seal shows signs of leakage, apply a thin bead of automotive‑grade silicone to ensure watertightness.
- Reconnect the washer hose and electrical connector, refit the interior trim and test the brake lamp function and washer spray before returning the vehicle to service.
Installation Recommendations
- Inspect and replace any degraded rubber seal or foam gasket to prevent future leaks.
- Clean the tailgate mating surface thoroughly before installing the lamp to ensure a proper seal.
- Use a suitable automotive silicone sealant where original sealing is compromised; avoid excessive application that could block vents or drain paths.
- Check wiring and connectors for corrosion; clean contacts and apply dielectric grease to protect against moisture.
- After installation, verify brake lamp illumination and washer nozzle alignment and spray pattern.
Why This Part Most Often Fails
The part typically fails due to prolonged exposure to water and contaminants that degrade the rubber seal and allow moisture into the lamp housing. UV ageing, small tailgate impacts and clogged or damaged washer nozzles are also common causes. Once moisture enters, electrical contacts corrode and the lamp or washer function may fail.
Order by Product Code For Fast Identification: 1606372780 / 6351W4. Compatible With Citroën C1, Peugeot 107 And Toyota Aygo Models. Suitable For Professional Fitment Or Confident DIY Replacement.
