Mercedes W164 W197 W204 W207 W212 W251 Intake Air Temperature Sensor A2048702751

Mercedes Intake Air Temperature Sensor from the Electronic Control Units and Controllers group is a precise component designed for intake systems in Mercedes models of the W164, W197, W204, W207, W212, and W251 classes. It is responsible for accurately measuring the temperature of the intake air, allowing the engine control unit to properly dose fuel and ensure stable engine operation.

Specifications and technical data

• SKU: A2048702751
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2048702751
• Category: ECUs & Computer Modules

Purpose and Function in the Engine Control System

The presented intake air temperature sensor works with the factory Mercedes engine control unit, transmitting a signal about the current thermal conditions in the intake manifold. Based on this data, the ECU corrects the fuel dose, ignition timing, and auxiliary equipment operating strategy, which translates into stable RPMs, predictable throttle response, and correct exhaust emission system operation.

In Mercedes vehicles of the W164, W197, W204, W207, W212, and W251 classes, a properly functioning intake air temperature sensor is particularly important for:

• cold engine starts and the warm-up phase,
• dynamic acceleration, when the amount and temperature of intake air change,
• maintaining an optimal fuel-air mixture under various load conditions.

Benefits of Using an Original Mercedes Sensor

Using an original intake air temperature sensor in a Mercedes ensures the correct signal characteristics and full compatibility with the maps stored in the engine control unit. This results in:

• predictable and repeatable fuel dose control,
• stable engine operation at idle and under load,
• reduced risk of ECU errors related to incorrect air temperature readings.

An original component from the Electronic Control Units and Controllers group is designed for the specific electrical and software architecture of Mercedes vehicles, which minimizes compatibility issues typical of aftermarket parts with ambiguous parameters.

Characteristics of the Used Component

The offered sensor is a used component, sourced from disassembly, which allows for a reasonable cost while maintaining the original manufacturer's specifications. In practice, this means you receive a component with factory operating characteristics, which can be an attractive alternative to new parts, especially for operational repairs and optimizing service budgets.

Before installation, a standard diagnostic procedure is recommended – verification of the electrical system, inspection of connectors, and clearing any potential engine control unit errors after sensor replacement. This approach facilitates quick confirmation of the repair's effectiveness and correct interaction with the existing control system.

Selection, Compatibility, and Technical Support

To correctly select the intake air temperature sensor for a specific Mercedes model, it is advisable to consult the manufacturer's catalog, markings on the old part, and information derived from the vehicle's VIN. This helps avoid problems with differences in wiring harnesses, connectors, or control unit software versions.

If you want to better understand how to safely choose used modules and sensors, how to check hardware and software compatibility, and what to look for during installation, check out the guide: Used Automotive Electronics – Second-Hand ECUs and Sensors.

Expanding the Electronic System in a Mercedes

If you are planning a comprehensive repair or upgrade of the engine control area in your Mercedes and need other components from the same group, such as ECU controllers, auxiliary modules, or additional sensors, check the available parts in the category Mercedes Electronic Control Units and Controllers.

A practical cost-and-technical guide may also be helpful in deciding whether to opt for a new or used part: Car Parts – New or Used? Cost and Durability Analysis.