Mercedes ML W164 Seat Belt Buckle Rear Right O/S Tensioner A1648601669

The Mercedes ML W164 Rear Seat Belt Buckle Tensioner is an original safety system component, designed for installation on the rear right side of the vehicle. The precisely fitted buckle with a tensioner ensures proper cooperation with the seat belt, supporting stable passenger restraint during driving.

Specifications and technical data

• SKU: A1648601669
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1648601669
• Substitutable numbers: A1648601669, A 164 860 16 69
• Location on the vehicle: Rear, Right
• Category: Seat Belts & Parts

Purpose and Function in the Safety System

The rear seat belt buckle tensioner operates as part of the passive safety system, responsible for the correct anchoring of the seat belt on the rear bench seat on the right side. Thanks to its factory design for the Mercedes ML W164, the correct belt routing geometry and compatibility with factory mounting points are maintained.

Its placement on the vehicle: rear – right side allows for unambiguous identification of the installation position, which reduces the risk of errors in part selection and speeds up servicing.

Original Origin and Compatibility

The component comes from the Mercedes line, meaning factory standards of manufacturing, construction, and fit are maintained. The original buckle with tensioner works with standard seat belts and factory body mountings, without the need for modifications or adaptations.

By using an original part from the Seat Belts and Parts category, consistency with other safety system elements, such as retractor mechanisms, mountings, and body anchor points, is preserved.

Performance Characteristics and Installation

The rear seat belt buckle tensioner is designed as a direct replacement for the factory part, which facilitates servicing and reduces replacement time. The design intended for the right side of the rear bench seat ensures:

• secure anchoring of the seat belt in the passenger's hip area,
• stable connection to the body at the manufacturer-designated mounting point,
• maintenance of the correct buckle position relative to the seat and backrest, which affects the comfort of fastening the belt.

The product is offered as a used original part, allowing for economical repair while maintaining factory construction and fit for the Mercedes ML W164.

Application in Service Practice

Replacement of the rear seat belt buckle tensioner is recommended, among other things, after the activation of the safety system, in case of a collision, or upon detection of mechanical damage. Using an original part for the rear right side allows for:

• restoring the full functionality of the seat belt system at the given seating position,
• maintaining compliance with factory safety requirements for the ML W164 model,
• minimizing the risk of installation problems resulting from the use of unsuitable aftermarket alternatives.

Related Products and Technical Knowledge

If you are looking for other components from the Mercedes seat belts and parts category, check out our dedicated offer: Mercedes seat belts and parts. There you will find compatible safety system components for various models of this brand.

To compare technical solutions used in sports models from other manufacturers, you can read the article on the construction of powertrains and chassis in high-performance cars: Audi RS vs. other models – what's under the hood and chassis?. This is a good supplement to understanding the construction differences between standard and sports versions.