BMW 3 5 X5 Series E60 LCI E70 E90 E91 M57N2 Exhaust Temperature Sensor 7809158

BMW 3 5 X5 Series E60 LCI E70 E90 E91 M57N2 Exhaust Temperature Sensor is a component from the Lambda sensors and O2 sensors group, designed for precise monitoring of exhaust system operating conditions in BMW vehicles. It enables the proper operation of the fuel-air mixture control and exhaust gas treatment systems, which translates into stable engine performance and accurate diagnostics.

Specifications and technical data

• SKU: 7809158
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7809158
• Substitutable numbers: 13627809158, 7809158, 13627806251, 7806251
• Category: Oxygen Sensors

Purpose and function of the BMW exhaust temperature sensor

The presented exhaust temperature sensor is designed to work with engines used in, among others, BMW X5, E60, E70, E90, and E91 series. Its task is to transmit accurate information about the temperature of gases in the exhaust system to the engine control unit, which allows for:

• monitoring the operation of the injection system and mixture composition,
• supporting the operation of emission reduction systems,
• more efficient detection of irregularities in engine and accessory operation.

Thanks to this, the sensor supports maintaining stable engine operating parameters and facilitates service data analysis.

Benefits of using an original BMW sensor

Using a component from the range of original BMW solutions ensures proper fitment to the electrical installation and exhaust system of a given model. The appropriate measurement characteristics of the sensor translate into:

• consistency of readings with the factory engine control unit software,
• correct system response to changes in load and temperature,
• reduced risk of errors associated with incompatible aftermarket replacements.

This solution is particularly important in vehicles where maintaining factory operating parameters and predictable drivetrain behavior is essential.

Installation and operational characteristics

The exhaust temperature sensor from this series is adapted to work in a demanding environment of high temperatures and variable loads. The design provided by the manufacturer allows for installation in the factory-designated location in the exhaust system, while maintaining the correct position of the measuring element relative to the exhaust gas flow.

When replacing, it is recommended to:

• use appropriate tools for removal to avoid damaging the thread in the manifold or exhaust pipe,
• check the condition of the wiring harness and connectors,
• perform adaptation or clear errors in the engine control unit after installation, if required by service procedures.

This type of sensor is often chosen when diagnosing problems with exhaust system operation, increased fuel consumption, or appearing error messages related to exhaust gas temperature.

Product condition and use in service practice

The offered item is in Used condition, which makes it an attractive option for optimizing repair costs, especially in vehicles that are used intensively or have higher mileage. In workshop practice, such components are often used as an economical solution for restoring the efficiency of the exhaust system and diagnostics.

If you want to better understand when choosing used electronic and measuring components is technically and economically justified, it is worth reading the guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?. You will find practical tips there regarding the selection and verification of used components.

Expansion of the measurement system in BMW

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as additional exhaust gas composition sensors, control probes, or measuring elements working with the exhaust system, check the available parts in the BMW Lambda sensors and O2 sensors category.