Description
Third brake light for Peugeot 308 T9 Combi and other Citroën and Peugeot models
Product Overview
This high-mounted third brake light (central stop lamp) is a direct-fit replacement commonly listed under part numbers 9688016380, 6351LX, 9800412680 and 9802932180. Designed for Citroën and Peugeot models, it restores the vehicle’s rear visibility and braking signalling. Ideal for professional workshops and DIY mechanics who search by OE code or chassis model, this unit helps maintain safety and legal compliance at the rear of the vehicle.
Function And Benefits
The third brake light increases conspicuity of braking events for following drivers by positioning a brake signal at eye level behind the vehicle. It complements the left and right brake lamps and reduces accident risk in heavy traffic. The unit is usually LED-based on modern models, offering lower power consumption, faster illumination and longer service life compared with incandescent solutions.
How It Is Replaced
Replacing the third brake light is a straightforward job for a trained technician or an experienced DIYer with basic tools.
- Open the tailgate and remove the inner trim panel to access the lamp housing fasteners.
- Disconnect the electrical connector from the lamp—inspect the connector for corrosion or bent pins.
- Remove mounting screws or clips securing the lamp, then extract the lamp assembly from the tailgate.
- Fit the new unit, ensuring the sealing gasket sits correctly to prevent water ingress.
- Reconnect the electrical plug and test the brake lamp function before refitting the trim.
Installation Recommendations
- Always disconnect the vehicle battery before starting work to avoid short circuits and accidental airbag deployment.
- Use the correct-size screwdrivers and trim tools to avoid damaging trim fasteners or painted surfaces.
- Check and, if necessary, renew the sealing gasket to maintain watertight installation.
- Inspect the harness connector for corrosion; clean contacts with contact cleaner and apply dielectric grease if required.
- After installation, verify lamp operation from inside the car and with a second person pressing the brake pedal to confirm correct mounting and function.
Why This Part Most Commonly Fails
Failures typically result from water ingress and corrosion of contacts, impact damage to the tailgate or lamp lens, UV degradation of the housing and cracked lenses, or internal LED/module failure due to heat cycling and vibration. Poor sealing or damaged gaskets accelerate moisture-related faults, and connector corrosion can cause intermittent operation.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Peugeot 308 T9 Combi; compatible with select Citroën and Peugeot models including Citroën C4 Picasso II, Peugeot 2008, Peugeot 308 T9, Peugeot 5008 I, Peugeot 508
- Product Codes: 9688016380, 6351LX
- Other Numbers: 9800412680, 9802932180
Notes For Buyers
Searches for this item are frequently made by OE reference numbers (for example 9688016380 or 6351LX). Ensure the number matches the replacement required for your vehicle trim and tailgate configuration. The part restores correct brake signalling and is a cost-effective repair when the original lamp is cracked, leaking or has failed electronically.
For Workshops And DIY Mechanics
This part is suited to professional fitters and competent DIY enthusiasts. When replacing, pay particular attention to sealing surfaces and connector condition to avoid premature repeat failures. Proper installation restores safety and passability during vehicle inspections.
