Mercedes W164 W251 Fuse Relay Module Rear Fuse Box Unit A1645402372

The Mercedes W164 W251 Rear Fuse Box Module is an original part from the fuses and fuse boxes category, designed for installation in the rear of the vehicle. This used module ensures a factory fit for the electrical system, facilitating servicing and restoring proper power supply to consumers in the rear of the car. It's a practical solution for users who want to maintain compatibility with the original Mercedes electrical architecture.

Specifications and technical data

• SKU: A1645402372
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1645402372
• Substitutable numbers: A1645402372, A 164 540 23 72
• Location on the vehicle: Rear
• Category: Fuses & Fuse Boxes

Purpose and Function of the Rear Fuse Box

The Mercedes W164 W251 Rear Fuse Box Module is responsible for distributing and protecting electrical circuits located in the rear of the vehicle, such as lighting, power outlets, and selected comfort modules. Its placement in the rear of the vehicle allows for shorter wiring harnesses and reduced voltage drops, leading to more stable system operation.

This component is particularly important in vehicles equipped with extensive electrical systems, where proper circuit protection is crucial for safety and operational reliability.

Construction and Benefits of Using an Original Module

The module is designed specifically for the Mercedes platform, offering:

• factory fit for electrical harnesses and mounting points,
• the manufacturer's intended configuration of fuse and relay sockets,
• consistency with the electrical architecture of W164 and W251 series vehicles.

Using an original rear fuse box minimizes the risk of compatibility issues that can arise with aftermarket alternatives. This is especially important for modern electrical systems where each module is interconnected with other network components.

Condition, Installation, and Service Application

The offered part is used, providing a cost-effective solution while maintaining factory specifications. The module is suitable as a replacement part for a damaged existing box or for comprehensive repairs of the electrical system in the rear of the vehicle.

Thanks to its original design, installation is straightforward – mounting points and connectors are prepared to work with factory harnesses. This reduces service time and the need for electrical system modifications.

Application in Diagnostics and System Upgrades

The rear fuse box is often checked during diagnostics of faults related to power loss in the rear of the vehicle. Replacing it with a functional module can eliminate problems caused by overheating contacts, corrosion, or mechanical damage. This is a practical solution for workshops specializing in the Mercedes brand and for users who want to restore full system functionality.

For upgrade projects where additional consumers are added to the rear of the car, a functional fuse box provides a solid foundation for further work, ensuring proper protection for new circuits.

Related Products and Guide Materials

If you are looking for other Mercedes fuses and fuse boxes, check out our dedicated category: Mercedes fuses and fuse boxes. There you will find a wide selection of electrical system components tailored for various models of this brand.

When planning more extensive work on your car, it's worth exploring the possibilities of using used parts. Practical tips can be found in the article: tuning with used parts – how to gain performance without losing a fortune, which discusses how to wisely choose used components while maintaining vehicle safety and reliability.