Mercedes W166 Rear Door Wiring Harness Cable Loom Left Right N/O/S A1664401606

Mercedes W166 Rear Door Wiring Harness Left Right is an original electrical system component designed for the rear doors of this series of vehicles. Thanks to factory fitment to the body and electrical connectors, it ensures stable signal connections and proper operation of door equipment. This is a practical solution for users who want to restore full functionality to the rear door electrics without modifying the existing installation.

Specifications and technical data

• SKU: A1664401606
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1664401606
• Substitutable numbers: A1664401606, A 166 440 16 06
• Location on the vehicle: Rear, Right, Left
• Part type: Wire Harness
• Category: Wiring Harnesses, Cables & Connectors

Vehicle Application and Placement

The presented wiring harness belongs to the Wires, Harnesses, and Connectors group and is intended for installation in the rear doors of the vehicle, both on the left and right sides. The design, intended for the rear body area, allows for correct routing of signals and power between the doors and the rest of the car's electrical system.

Its placement on the vehicle covers the rear part of the body, dedicated to both sides, which facilitates component selection for repairs related to damaged wires in door grommets or after collisions.

Technical and Functional Characteristics

The harness is designed as an electrical system component for the rear doors, with appropriately selected wire lengths and connector placement. The wire routing is adapted to factory mounting points, which reduces the risk of chafing, kinks, and improper positioning in the grommets between the pillar and the door.

This solution allows for seamless integration with the vehicle's existing electrical system, ensuring:

• stable electrical connection between the rear doors and the body,
• proper routing of control and power supply signals,
• maintenance of the factory installation logic without the need for adapting universal wires.

Benefits of Using an Original Mercedes Harness

Using an original wiring harness in the rear doors translates to reliable integration with the electrical system and compatibility with factory connectors. This reduces the risk of module communication problems, errors in comfort systems, or malfunctions resulting from improper connections.

The main advantages of this solution include:

• maintaining factory wire routing and mounting points,
• consistency with other electrical system components in the vehicle,
• the ability to restore proper operation of rear door equipment after mechanical or wear-and-tear damage.

Item Condition and Service Application

The wiring harness comes from the group of used parts, allowing for economical repair of the electrical system while maintaining the original manufacturer's specifications. This type of component is particularly useful in situations where wires have been broken in the grommet, connectors are damaged, or the entire section of the wiring in the rear doors needs replacement.

This solution is suitable for both routine repairs and comprehensive system rebuilds after body damage, enabling the restoration of electrical system functionality in the rear of the vehicle.

If you are planning a comprehensive repair or upgrade of the electrical system area in your Mercedes and need other components from the same group, such as door harnesses, wire sections, or installation connectors, check the available parts in the Mercedes Wires, Harnesses, and Connectors category.

If you want to better plan your purchase of used components and consciously select used electrical system parts, consult the guide Used Parts – Your Guide to the Best Offers in the Automotive Store, which helps assess the cost-effectiveness and selection method for such service solutions.