Mercedes-Benz M-Class ML W164 Rear Left Seat Belt Buckle Tensioner A1648601569

Mercedes-Benz M-Class ML W164 Rear Left Seat Belt Buckle Tensioner is an original component from the Seat belts and parts group, designed for installation in the rear left section of the vehicle. It enables the seat belt to be fastened correctly, ensuring a stable connection and the safe operation of the entire system.

Specifications and technical data

• SKU: A1648601569
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1648601569
• Substitutable numbers: A1648601569, A 164 860 15 69
• Location on the vehicle: Rear, Left
• Category: Seat Belts & Parts

Purpose and function of the seat belt buckle

The rear left seat belt buckle in W164 series models is responsible for the mechanical connection between the seat belt and the seat structure. A properly functioning buckle:

• ensures the seat belt is securely fastened while driving,
• allows for quick release in an emergency situation,
• works in conjunction with the vehicle's passive safety systems.

Its location in the rear zone, on the left side, means the component is dedicated to a specific seating position, which simplifies the selection of the correct part in terms of installation and compatibility.

Construction and fitment for Mercedes W164

Mercedes-Benz M-Class ML W164 Rear Left Seat Belt Buckle Tensioner has been designed with the seat geometry and body structure of this SUV generation in mind. The appropriate profiling of the mount and cable routing (if present in the specific vehicle configuration) allows for:

• stable seating in the factory mounting point,
• proper positioning relative to the seat cushion and backrest,
• maintaining ergonomics for the rear seat passenger.

By using an original solution from the Seat belts and parts group, consistency with the vehicle's factory design is maintained, which is important for both comfort and safety.

Characteristics of the used component

The offered seat belt buckle is a used part, sourced from vehicle dismantling. This type of part allows for an economical repair of the safety system while maintaining the manufacturer's original specifications. In practice, this means:

• maintaining the factory manufacturing standard,
• no need for adaptations or modifications to the mounts,
• the possibility of direct installation in place of the damaged buckle.

Before installation, it is recommended to perform a standard check of the locking and release mechanism to ensure that the component operates smoothly and without jamming.

Safety and service application

A functional seat belt buckle is crucial for the operation of the entire passenger protection system. Replacing a damaged or worn component with an original buckle dedicated to the rear left side of the W164 allows you to:

• restore full functionality of the seat belt mounting point,
• maintain compliance with the manufacturer's design assumptions,
• reduce the risk of incorrect fastening while driving.

This solution is particularly recommended for post-accident repairs, inspections related to the safety system, and when problems with locking or unlocking the belt are identified.

If you are planning a comprehensive repair or upgrade of the rear passenger safety zone in your Mercedes and need other components from the same group, such as tensioners, retractors, or additional mounts, check the available parts in the Mercedes seat belts and parts category.

Practical tips for drivers

To better plan the maintenance of the safety system in your car and assess which components are worth checking or replacing as a precaution, read our guide TOP 10 most frequently replaced parts in your car. This is a helpful source of knowledge when planning inspections and optimizing vehicle operating costs.