Volvo V40 Brake Light Stop Switch Pedal Sensor 8T4T9G854-AA

Volvo V40 Brake Light Stop Switch Pedal Sensor is an original part from the Switches, control elements and ignition locks group, responsible for precisely detecting brake pedal depression and activating the brake lights. It is a key component for the proper operation of the braking signaling system, affecting vehicle safety and compliance with traffic regulations.

Specifications and technical data

• SKU: 8T4T9G854-AA
• Mark: Volvo
• Condition: Used
• OEM Part Number: 8T4T9G854-AA
• Part type: Push Switch
• Category: Switches & Controls

Function and role in the braking system

The brake light switch in the Volvo V40 works as a brake pedal position sensor that transmits a signal to the vehicle's electrical system. A properly functioning component ensures that the brake lights illuminate at the right moment, which is essential for both the driver and the vehicles behind. Stable sensor operation is important not only for the lighting itself but also for assistance systems that may use braking information. This ensures the consistency of the electrical and control system operation within the brakes.

Benefits of using an original Volvo component

Using an original switch from the Switches, control elements and ignition locks group ensures a proper fit for the Volvo V40 electrical system. The appropriate mounting geometry and compatibility with factory connectors reduce the risk of looseness, poor contact, or system operation errors. The main advantages of using this component include:

• maintaining the factory operating characteristics of the brake pedal in the context of activating the brake lights,
• consistency with the original electrical harness and controls,
• reducing the risk of incorrect installation due to the design intended for the specific model.

Purpose and application in the Volvo V40

The presented brake pedal sensor is dedicated for use in the Volvo V40, where it is responsible for generating the braking signal. A properly selected element of this type is particularly important when troubleshooting issues such as lack of brake lights, delayed activation, or incorrect operation in certain pedal positions. Replacing a worn or damaged switch with a functional component allows for restoring the proper operation of the braking signaling system, which has a direct impact on driving safety and the positive outcome of periodic technical inspections.

Condition and installation recommendations

The item comes from the secondary market and is intended for users looking for a functional solution consistent with Volvo's factory specifications. Before installation, it is recommended to check the socket, the harness, and the correct positioning of the sensor relative to the brake pedal to ensure the proper circuit engagement and disengagement point. Professional installation, following the manufacturer's service procedures, reduces the risk of re-disassembly and ensures stable system operation in the long term.

Expanding the control system and interior modernization

If you are planning a comprehensive repair or modernization of the control and driver operation zone in your Volvo and need other elements from the same group, such as combination switches, function buttons, or ignition lock elements, check the available parts in the Volvo switches, control elements and ignition locks category. While working on the control system, it is also worth considering refreshing the vehicle's interior. Practical tips on selecting used cockpit elements, such as steering wheels, knobs, or other components, can be found in the article "Steering wheels and other interior elements – how to transform your car with secondary market parts?", which discusses issues of compatibility, safety, and ergonomics when using second-hand OEM parts.