Mercedes-Benz ML W164 GL X164 Gearbox Tunnel Heat Insulation Cover A1646821701

The Mercedes-Benz ML W164 / GL X164 Gearbox Tunnel Heat Shield is an original body part designed to protect the gearbox tunnel from excessive heat. Thanks to its factory fit for the ML and GL W164/X164 models, it ensures stable mounting, effective thermal insulation, and maintains proper operating conditions for components in the gearbox area.

Specifications and technical data

• SKU: A1646821701
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1644710087
• Substitutable numbers: A1644710087, A 164 471 00 87, BG
• Category: Heat Shields, Wraps & Sleeves

Purpose and Technical Function

The presented heat shield belongs to the group of Heat Shields, Connectors, and Sleeves and is factory-fitted to the gearbox tunnel in Mercedes-Benz ML W164 and GL X164 vehicles. Its purpose is to limit heat transfer from the exhaust system and powertrain to the cabin interior and the vehicle's body structural elements.

The appropriately shaped surface of the shield directs hot air away from the tunnel, which contributes to:

• maintaining a stable temperature in the gearbox area,
• reducing thermal stress on floor components,
• limiting the risk of overheating adjacent components.

Construction and Fit for Mercedes-Benz ML W164 / GL X164

The heat shield is designed as an OEM part for the W164/X164 platform, meaning a precise fit to the factory mounting points in the body. The shape and profile of the shield are adapted to the geometry of the gearbox tunnel and the routing of the exhaust system, ensuring a predictable and repeatable installation process.

This solution ensures:

• proper adhesion to the tunnel surface,
• no interference with other underbody components,
• preservation of the original thermal protection concept during repairs and replacements.

Benefits of Using an Original Heat Shield

Using an original heat shield to replace a missing or damaged part restores the factory level of thermal protection in the gearbox area. This, in turn, can positively impact the durability of components in the center tunnel, thermal comfort inside the cabin, and the stable operation of elements mounted near the gearbox.

Choosing a used OEM part is often a beneficial service solution – it allows for compliance with the manufacturer's design while reducing repair costs. If you want to better understand how the availability of original used components affects vehicle downtime in the workshop, it's worth reading the article Availability of Car Parts Off the Shelf vs. Repair Time – How Used OEM Parts Shorten Workshop Stays?.

Item Condition and Service Application

The offered heat shield is a used item, which in workshop practice means the possibility of an economical replacement for a missing or damaged shield while maintaining the original design specifications. This type of part is suitable for both standard accident repairs and comprehensive work on the gearbox tunnel area, where it is necessary to restore the complete thermal insulation package.

If you are planning a comprehensive repair or upgrade of the gearbox tunnel area in your Mercedes and need other parts from the same group, such as heat shields, connectors, or sleeves, check the available parts in the Mercedes Heat Shields, Connectors, and Sleeves category.