Mercedes W124 M103 M104 Petrol Engine Throttle Body Housing A0021402653

Mercedes W124 M103 M104 Petrol Engine Throttle Body Housing is a precision intake system component designed for petrol engines, responsible for the accurate metering of air entering the combustion chamber. Using an original throttle body from the Mercedes Throttle Bodies group helps maintain stable engine operation, proper throttle response, and predictable performance parameters. This is a solution for users who expect consistency with factory specifications and wish to maintain the correct engine operating characteristics.

Specifications and technical data

• SKU: A0021402653
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0021402653
• Substitutable numbers: A0021402653, A 002 140 26 53
• Location on the vehicle: Front
• Fuel type: Petrol
• Category: Throttle Bodies

Function and role of the throttle body in the Mercedes W124

The throttle body in M103 and M104 petrol engines is responsible for regulating the amount of air drawn into the intake manifold, thereby shaping torque and power across the entire rev range. A properly functioning component ensures:

• stable idle speed,
• smooth response to accelerator pedal input,
• consistent fuel-air mixture parameters,
• seamless integration with the engine management system.

By maintaining the factory geometry of the channels and the throttle plate, the intake system retains the correct flow resistance, which translates into predictable vehicle behavior under various load conditions.

Purpose and location in the vehicle

The described throttle body is intended for installation in the front part of the engine bay, within the intake system area. Its configuration is adapted to the specifics of petrol units, where precise control of air volume under varying loads and engine speeds is crucial.

Such placement facilitates service access, inspection of the component's condition, and potential cleaning of the flow channels. Proper installation on the intake manifold axis is essential for maintaining airtightness and correct cooperation with other fuel system components.

Benefits of using an original Mercedes throttle body

Choosing a throttle body dedicated to the Mercedes W124 with M103/M104 engines allows you to maintain engine performance parameters in line with the manufacturer's specifications. Key advantages include:

• Factory fit – compatibility with the intake manifold design and engine accessories, without the need for modifications.
• Stable operating characteristics – predictable engine behavior during acceleration, engine braking, and constant speed driving.
• Consistency with the control system – correct cooperation with the control electronics and other sensors in the fuel system.
• The ability to preserve the original engine refinement typical of classic Mercedes models.

The component from the Throttle Bodies category is crucial wherever you want to maintain smooth engine operation, reduce idle fluctuations, and preserve proper dynamics while controlling fuel consumption.

Product characteristics and condition

The offered throttle body is a used part, which in practice means it has been removed from a vehicle and may show signs of previous use, while retaining the functionality required for further operation. This type of solution is often chosen for servicing classic models, where combining structural compatibility with reasonable repair costs is important.

Before installation, a standard service procedure is recommended, including checking the tightness of connections, verifying the free movement of the throttle plate, and – if necessary – cleaning the intake channels according to workshop recommendations. This approach allows you to fully utilize the component's potential and reduce the risk of unstable idle or delayed throttle response.

Technical support and additional information

When selecting a throttle body for a specific engine version and model year, it is worth paying attention to compatibility with the engine unit and the fuel system configuration. In case of doubt, it is helpful to compare the design of the component with the currently installed part and consult with an experienced service center specializing in the Mercedes brand.

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 housings, throttle control modules, or additional intake system elements, check the available parts in the Mercedes Throttle Bodies category.

To better understand the benefits of using original, used components in the fuel and intake system, it is worth reading an article discussing the importance of OEM parts and their impact on vehicle safety and durability: Quality assurance and OEM safety – why used original car parts are the best choice for your vehicle?.