BMW G20 G21 G30 G31 G11 G12 B57 Diesel Exhaust Gas Pressure Sensor 8571783

BMW G20 G21 G30 G31 G11 G12 B57 Exhaust Pressure Sensor is an original part from the Lambda Sensors and O2 Sensors group, designed for BMW diesel engines from the B57 family. It enables precise measurement of exhaust pressure in the exhaust system, which is crucial for the proper functioning of the exhaust gas purification system in modern diesel units. Thanks to its factory origin, it ensures proper cooperation with the vehicle's control electronics and software.

Specifications and technical data

• SKU: 8571783
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8571783
• Substitutable numbers: 8571783, 13628571783
• Fuel type: Diesel
• Category: Oxygen Sensors

Purpose and Function in B57 Diesel Engines

This exhaust pressure sensor is used in modern BMW diesel units, where it is responsible for monitoring gas parameters in the exhaust system. Correct pressure readings are essential for:

• precise control of the combustion process in a diesel engine,
• proper operation of the exhaust gas recirculation (EGR) system and exhaust gas purification system,
• maintaining stable performance and smooth operation of the powertrain,
• reducing emissions and protecting components such as the particulate filter.

Thanks to its compatibility with the specific B57 engine family, the sensor works with the factory engine control unit, which helps maintain the parameters specified by the manufacturer.

Benefits of Using an Original BMW Sensor

Using an original exhaust pressure sensor in a BMW diesel engine offers a range of practical operational benefits:

• Proper communication with the ECU – the sensor is designed for specific control units and software, minimizing the risk of diagnostic errors.
• Stable exhaust system operating parameters – correct exhaust pressure values facilitate the maintenance of appropriate regeneration strategies and component protection.
• Better measurement repeatability compared to random aftermarket replacements with uncertain characteristics.
• Consistency with the factory electrical system architecture and engine bay mounting points.

In BMW 3 Series, 5 Series, and 7 Series vehicles with B57 diesel engines, selecting the correct sensor directly impacts driving comfort, throttle response, and predictable powertrain behavior.

Characteristics of the Used Component

The offered sensor is a used part, allowing for economical repair of the exhaust system while maintaining the original manufacturer's specifications. In practice, this means the possibility of restoring the correct operation of the exhaust pressure measurement system without the need to invest in a new OEM component.

For electronics and sensors in BMW vehicles, matching the engine type, model generation, and operating parameters is particularly important. A correctly selected used exhaust pressure sensor can be an effective solution for both routine repairs and diagnosing exhaust system problems in diesel units.

Selection, Installation, and Technical Aspects

When selecting an exhaust pressure sensor for a BMW with a B57 diesel engine, it is worth paying attention to:

• compatibility with the specific body generation (e.g., G20, G21, G30, G31, G11, G12),
• the type of powertrain (diesel engine),
• consistency with the existing electrical harness and exhaust system mounting points.

The installation of the sensor itself requires maintaining the tightness of connections in the exhaust system and correctly connecting the electrical connector. After installation, it is recommended to perform a computer diagnostic to verify readings and, if necessary, clear any stored error codes in the engine control unit.

To better understand the specifics of selecting used sensors and electronic modules in modern vehicles, it is worth reading the Global Parts guide – Used Automotive Electronics Onboard – Why Choose Second-Hand ECUs and Sensors?, which discusses issues such as compatibility, markings, and practical application examples.

Expansion of the Exhaust Measurement System in BMW

If you are planning a comprehensive repair or upgrade of the exhaust system area in your BMW and need other parts from the same group, such as additional oxygen sensors, control probes, or measurement elements in the exhaust path, check the available parts in the BMW Lambda Sensors and O2 Sensors category.