Mercedes-Benz A B W169 W245 Gas Exhaust Temperature Sensor A0071538928

Mercedes-Benz A B W169 W245 Gas Exhaust Temperature Sensor is an original exhaust system component designed for precise monitoring of gas temperatures in A-Class and B-Class engines. Thanks to its factory-fit design for the W169 and W245 platforms, it ensures stable integration with the control electronics and proper operation of emission control systems. This used OEM component is a sensible choice for vehicle maintenance when you want to maintain performance parameters consistent with the manufacturer's specifications.

Specifications and technical data

• SKU: A0071538928
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0071538928
• Substitutable numbers: A0071538928, A 007 153 89 28, EM
• Category: Other Interior Parts & Accessories

Function and application of the exhaust gas temperature sensor

The exhaust gas temperature sensor in Mercedes A-Class and B-Class vehicles on the W169 and W245 platforms is responsible for real-time measurement of gas temperatures in the exhaust system. This information is used by the engine control unit (ECU) for:

• controlling the combustion process and protecting exhaust system components from overheating,
• proper operation of emission reduction systems,
• diagnosing fault conditions related to excessive exhaust gas temperatures.

By using an original Mercedes sensor, the correct measurement characteristics are maintained, which minimizes the risk of ECU errors and the engine unexpectedly entering limp mode.

Benefits of using an original Mercedes component

Choosing a used, factory-original Mercedes-Benz A B W169 W245 Gas Exhaust Temperature Sensor allows you to maintain the integrity of the entire powertrain. Key advantages include:

• Full electrical and mechanical compatibility with the vehicle's wiring, without the need for harness or thread modifications.
• Correct signal characteristics, matched to the engine control maps used in these model generations.
• The ability to restore proper exhaust system operation after the occurrence of exhaust temperature-related errors.

A component selected in this way is particularly recommended for repairs where compliance with factory settings and reducing the risk of computer diagnostic issues is important.

Condition, verification, and selection by part numbers

The offered Mercedes exhaust gas temperature sensor comes from the Other category and is a used item, which allows for lower repair costs while maintaining original build quality. Before installation, a standard check of the electrical wiring and the mounting thread is recommended to ensure proper thermal contact and stable temperature readings.

Selection of this type of component should always be based on the OEM number and interchangeable numbers assigned to a specific reference. If you want to check step-by-step how to correctly match a part by catalog number or VIN, the following practical guide will be helpful: how to choose the right car part by VIN and OEM number. This will minimize the risk of purchasing an incompatible part and speed up the service process.

Integration with the powertrain and diagnostics

A properly functioning exhaust gas temperature sensor has a direct impact on engine control unit operation, fuel injection strategy, and the protection of exhaust system components. In the case of incorrect readings, the following may occur:

• warning lights on the dashboard,
• stored errors in the ECU memory related to exhaust gas temperature,
• loss of performance or the engine entering limp mode.

Replacing it with a functional, original sensor in many cases restores stable engine operation and improves measurement repeatability during computer diagnostics, which facilitates further vehicle maintenance.

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 additional sensors, harnesses, or control modules, check the available parts in the Other Mercedes category.

Technical support and knowledge development

When working with advanced powertrains, it is worth expanding your knowledge about the design differences between individual model lines and their high-performance versions. To compare solutions used in sports variants and standard vehicle versions, you can refer to the article: Audi RS vs other models – what is hidden under the hood and chassis?. This will allow you to better understand how manufacturers design exhaust systems, cooling, and engine control in different classes of cars.