Description
Audi A8 4H A6 A7 4G Diesel Exhaust Gas Temperature Sensor Pre DPF is a precision exhaust system component responsible for accurately measuring gas temperatures before the diesel particulate filter. Thanks to its factory-fit design for Audi models and compatibility with diesel engine requirements, this component from the Temperature Sensors category supports the proper operation of the engine control unit and the exhaust gas aftertreatment system. It is a practical solution for users looking to restore correct DPF system performance without investing in a new part.
Specifications and technical data
- SKU: 4H0906088AG
- Mark: Audi
- Condition: Used
- OEM Part Number: 4H0906088AG
- Substitutable numbers: 4H0906088AG, 4H0 906 088 AG
- Fuel type: Diesel
- Category: Temperature Sensors
Function and application in the diesel exhaust system
The described exhaust gas temperature sensor is installed in the exhaust section before the DPF filter, where it monitors the actual exhaust gas temperature. Data from the sensor is used by the engine control unit to:
- control the diesel particulate filter regeneration process,
- protect exhaust system components from overheating,
- maintain stable operating parameters for the diesel engine,
- diagnose potential irregularities in DPF operation.
Precise temperature readings are particularly important in modern Diesel units, where injection and filter regeneration strategies rely on data from multiple exhaust gas temperature sensors.
Compatibility with Audi A8 4H, A6, and A7 4G models
The sensor has been specifically designed for selected versions of the Audi A8 4H generation as well as the Audi A6 and A7 4G generations with diesel engines. This ensures:
- factory-fit compatibility with the thread and mounting location in the exhaust system,
- electrical compatibility with the vehicle’s wiring harness,
- seamless integration with the engine control unit software intended for these models.
As a result, the sensor can be used as a component to restore proper DPF system operation following a failure of the previous sensor, without the need for any wiring modifications.
Performance characteristics and benefits
As an original Audi component, the exhaust gas temperature sensor ensures stable operating parameters under the demanding thermal conditions of the exhaust system. Key benefits include:
- Appropriate measurement characteristics matched to the diesel engine control strategy in the Audi A8, A6, and A7.
- Reduction of engine control unit errors related to incorrect exhaust gas temperature readings.
- Support for proper DPF filter regeneration, which helps maintain exhaust system flow.
- A reasonable compromise between cost and functionality by utilizing a pre-owned part.
Choosing this solution is particularly advantageous for repairs where maintaining the vehicle’s original specifications and proper interaction with existing electronics is a priority.
Condition, verification, and part number matching
The offered sensor comes from a group of pre-owned parts, which allows for lower repair costs while maintaining the original design of the component. Before installation, it is recommended to verify compatibility using the OEM number and interchangeable part numbers, as well as to match it to the specific engine version and vehicle model year.
To better understand how to safely select used sensors and other electronic components, it is worth checking out our guide on matching by part numbers and the compatibility of control units and sensors: Used automotive electronics – ECU modules and second-hand sensors.
Support for expanding the temperature measurement system in Audi
If you are planning a comprehensive repair or upgrade of the exhaust system area in your Audi and need other components from the same group, such as additional exhaust gas temperature sensors, post-DPF sensors, or control elements for the measurement system, check out the available parts in the Audi Temperature Sensors category.
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