Citroen Relay III Stop Lamp Brake Light Pedal Sensor 25162684

The Citroën Relay III brake light switch sensor is a precise lighting system component responsible for reliably activating the rear brake light when the brake pedal is pressed. As part of the Main and Center Brake Lights group, it ensures proper braking indication, directly impacting driving safety and signal clarity for drivers behind.

Specifications and technical data

• SKU: 25162684
• Mark: Citroën
• Condition: Used
• OEM Part Number: 25162684
• Substitutable numbers: 25162684
• Location on the vehicle: Rear
• Category: Centre & Third Brake Light Assemblies

Purpose and Function in the Braking System

The presented brake pedal sensor is designed to work with the third-generation Citroën Relay model and is installed in the rear area of the vehicle, within the system responsible for controlling the brake lights. Its function is to generate an electrical signal when the brake pedal is pressed, which activates the brake lights and informs other road users that braking has commenced.

A functional brake pedal sensor is crucial for:

• maintaining the correct operation of the rear brake lights,
• ensuring compliance with vehicle lighting regulations,
• reducing the risk of collisions due to a lack of braking signal.

Construction and Fit for Citroën Relay III

The sensor is an OEM type component, dedicated to a specific application in the Citroën Relay III, ensuring proper integration with the electrical system and brake pedal assembly. The connector and housing design are prepared for factory mounting points, allowing for an organized installation without requiring modifications to the wiring.

Its appropriate placement in the rear zone of the vehicle allows for stable operation under typical operating conditions for commercial vehicles, where the braking and lighting systems are used intensively.

Condition, Verification, and Service Application

This part is sourced from a dismantled vehicle and is offered as a used genuine component, which in service practice often represents a favorable compromise between repair cost and maintaining the vehicle's factory specifications. This type of sensor is particularly useful for:

• repairs to the brake light system after an electrical failure,
• diagnosing issues with brake lights not responding to pedal application,
• restoring full functionality of the braking system after a collision or wiring intervention.

By retaining its original geometry and operating characteristics, replacing with such a sensor allows for quick restoration of correct brake signal operation without the need for system adaptation or modification.

Benefits of Using a Genuine Sensor in a Citroën

Using a dedicated brake pedal sensor in the Citroën Relay III ensures:

• stable activation of brake lights with every pedal press,
• consistency with the factory electrical system design,
• easier future diagnostics due to the preservation of the original system architecture.

This solution is particularly recommended for commercial vehicles, where the reliability of brake signaling directly impacts operational safety and fleet management.

If you are planning a comprehensive repair or upgrade of the rear lighting area in your Citroën and need other parts from the same group, such as taillight assemblies, additional brake lights, or lighting control modules, check the available parts in the Citroën Main and Center Brake Lights category.

For drivers and workshops concurrently diagnosing engine overheating or planning broader service work on the vehicle, an article describing the impact of operating temperature on engine durability may be helpful – more information can be found in the material Engine Cooling System – Overheating, Repair, and Used Radiators.