Mercedes-Benz A-Class W168 M166 Air Filter Box A1660940101 A1661407600

Mercedes-Benz A-Class W168 M166 Air Filter Box is an original air filter housing from the Air filters range, designed for installation in the rear part of the intake system in Mercedes A-Class W168 models with the M166 engine. This component ensures stable airflow to the engine and secure seating of the filter element, which promotes smooth operation of the power unit.

Specifications and technical data

• SKU: A1660940101
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1660940101
• Substitutable numbers: A1660940101, A 166 094 01 01, A1661407600, A 166 140 76 00, A1660940004, A 166 094 00 04, EM
• Location on the vehicle: Rear
• Category: Air Filters

Purpose and function in the intake system

The air filter housing in this Mercedes model is responsible for the airtight sealing of the filter element and proper airflow routing in the rear part of the engine bay, in accordance with the design of the M166 engine intake system. Thanks to its fitment for the specific A-Class W168 body version, the component works with factory intake ducts and mounts, reducing the risk of leaks and unwanted vibrations.

A properly selected air filter housing helps maintain stable engine operating conditions, supporting uniform air intake and reducing the impact of environmental contaminants. For the user, this means more predictable engine behavior and easier maintenance when replacing the filter element.

Compatibility with Mercedes A-Class W168 M166

The presented housing has been designed specifically for the architecture of the Mercedes A-Class W168 with the M166 engine, which translates into proper fitment to factory mounting points and the geometry of the rear part of the intake system. Using an original solution allows you to avoid problems typical of aftermarket replacements, such as poor fitment or the need for mounting modifications.

Due to the preservation of the factory design, installation is predictable for the mechanic – the housing works with standard brackets, hoses, and adjacent components in the engine bay. This is a beneficial solution both for standard replacement of a damaged housing and for restoring the vehicle to a configuration close to factory condition.

Characteristics of the used component

The air filter housing comes from disassembly, which means it is a used component that retains a design consistent with the original Mercedes factory project. This type of part is a reasonable choice for maintenance repairs when the priority is to maintain the original geometry of the intake system while optimizing costs.

In the case of air filter housings, it is crucial that the body provides adequate rigidity, connection tightness, and proper airflow. Using an original Mercedes solution helps maintain predictable engine performance parameters and facilitates subsequent service activities related to replacing the filter element.

Benefits of using an original air filter housing

Using a factory air filter housing in a Mercedes A-Class W168 M166 brings a number of practical benefits:

• maintaining compliance with the manufacturer's intake system design,
• proper fitment to standard mounts in the rear part of the vehicle,
• easier installation and removal during service,
• stable seating of the air filter element,
• reduction of the risk of leaks in the intake area.

For workshops and users, this means predictable installation time, lower risk of post-repair issues, and the ability to maintain a configuration close to factory specifications, which is particularly important during long-term vehicle operation.

If you are planning a comprehensive repair or upgrade of the intake system area in your Mercedes and need other components from the same group, such as housings, elements, or intake ducts, check out the available parts in the Mercedes Air filters category.