Description
Third Brake Light for Peugeot 407 Sedan
Product Overview
High-Mounted Third Brake Light designed for Peugeot 407 Sedan. This replacement part restores correct signalling at the rear of the vehicle and meets the fitment expectations for workshop repairs and DIY maintenance. Ideal for mechanics and car owners searching by product code 6351S9 or looking for a direct-fit rear brake lamp for the Peugeot 407.
Key Features & Benefits
- Direct Fit Replacement: Manufactured to match the original mounting points and electrical connector layout for easy installation.
- Improves Safety: Restores the high-mounted brake signal that is critical for visibility to following traffic.
- Searchable By Code: Commonly sought under part number 6351S9, improving findability for repairs and parts ordering.
- Workshop-Ready: Suitable for professional garages and skilled DIYers performing rear-light repairs on the Peugeot 407.
How It Works And Typical Faults
The third brake light provides a high-mounted stop signal that supplements the main brake lamps and increases visibility to vehicles behind, especially in dense traffic. Common failure modes include bulb burnout (if fitted with a replaceable bulb), LED module failure (on LED variants), water ingress leading to corrosion of contacts, cracked housing from impacts, or damaged wiring/connectors caused by trunk use or poor sealing.
How To Replace
Replacement is straightforward for a competent technician or an experienced DIYer. Typical steps:
- Open the trunk and remove the interior trim panels to access the lamp from inside the boot area.
- Disconnect the electrical connector for the brake light.
- Unscrew or unclip the retaining fasteners holding the lamp assembly in place.
- Remove the old lamp, fit the new assembly, secure fasteners and reconnect the electrical plug.
- Test the brake lamp operation with the ignition on and brake pedal applied before reassembling the trim.
Installation Recommendations
- Disconnect The Battery Or Isolate The Circuit: To avoid short circuits while working on the rear lighting harness, disconnect the negative battery terminal or ensure the lighting circuit is off.
- Check Gaskets And Seals: Inspect rubber seals and trunk trim for damage; replace any deteriorated seals to prevent future water ingress.
- Use Proper Tools: Use trim tools to avoid damaging interior panels and the lamp housing.
- Test After Fitment: Verify brake light operation and alignment before completing the reassembly.
Reason For Most Common Failure
The most frequent causes of third brake light failure are electrical contact corrosion from moisture, impact damage to the lamp housing, and simple lamp/bulb burnout. Poor trunk sealing or worn gaskets allow water to reach the connector or lamp body, accelerating corrosion and electrical faults.
Technical Information
- Manufacturer: Stellantis (Peugeot)
- Model: Peugeot 407 Sedan
- Product Codes: 6351S9
- Additional Numbers: 6351 S9
Compatibility And Notes
Fits Third Brake Light applications for the Peugeot 407 Sedan. Part is commonly referenced by code 6351S9. Always confirm the appearance and connector type match the vehicle before installation when sourcing parts for collision repair or lamp replacement.
