Mercedes-Benz W168 M166 Petrol Throttle Body A1661413125

Mercedes-Benz W168 M166 Petrol Throttle Body is a precision intake system component designed for petrol engines, responsible for the accurate metering of air entering the combustion chamber. Thanks to its factory design for the Mercedes brand, it ensures proper integration with the vehicle's electronics and stable engine operation. This used component from the Throttle Bodies category is a sensible choice for professional repairs or maintenance of the fuel supply system.

Specifications and technical data

• SKU: A1661413125
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1661413125
• Substitutable numbers: A1661413125, A 166 141 31 25, EM
• Location on the vehicle: Front
• Fuel type: Petrol
• Category: Throttle Bodies

Purpose and technical function

The offered throttle body is dedicated to W168 series models with the M166 engine, where it is responsible for regulating the amount of air drawn into the petrol engine. Its location in the front part of the engine bay facilitates service access and allows for efficient replacement in workshop conditions. A properly functioning component of this type contributes to:

• stable idle speed,
• smooth acceleration without jerking,
• correct response to throttle pedal input,
• maintaining the proper air-fuel mixture ratio.

Benefits of using an original throttle body

Choosing a throttle body designed specifically for the M166 unit allows you to maintain factory engine performance parameters. Proper intake channel geometry and compatibility with the engine control unit reduce the risk of diagnostic errors and adaptation issues. For the user, this means:

• more predictable vehicle behavior across the entire rev range,
• consistent cooperation with the fuel injection system,
• reduced risk of uneven operation on both cold and warm engines.

Installation characteristics

The throttle body, designed for installation in the front of the engine bay in a petrol-powered vehicle, allows for the use of standard service procedures without the need for installation modifications. Maintaining the original design concept facilitates the mechanic's work, shortens replacement time, and reduces the risk of leaks in the intake system. This is a practical solution both for repairing a single component and for broader engine service.

Application in petrol engines

In petrol engines, the precise operation of the throttle body is crucial for proper mixture combustion. This component works in conjunction with sensors and the engine control unit, and its condition affects engine refinement, fuel consumption, and exhaust emissions. A functional throttle body helps to limit typical signs of wear, such as fluctuating idle, power loss, or delayed throttle response, which translates into a more comfortable vehicle operation.

Service expansion and additional information

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as throttle bodies, throttle control modules, or additional intake system parts, check out the available parts in the Mercedes Throttle Bodies category.

To better plan service work and reduce vehicle downtime in the workshop, it is worth familiarizing yourself with practical tips on using a wide range of used parts from a single warehouse – details can be found in the article No more weeks of waiting – how a wide range of parts in one warehouse really shortens your car's downtime at the mechanic's?.