Audi S6 C7 S7 4G Lambda Probe Oxygen Sensor 5 Pin Cyl. 1-4 4.0 Petrol 0258027199

Audi S6 C7 S7 4G 4.0 Petrol Lambda Sensor 5 Pins Cyl. 1-4 0258027199 is a precise component from the Lambda Sensors and O2 Sensors group, responsible for controlling the fuel-air mixture composition in a gasoline engine. A properly selected lambda sensor ensures stable engine operation, correct engine control unit response, and reduced fuel consumption and exhaust emissions. This component is designed for gasoline-powered systems requiring accurate information about oxygen content in the exhaust gases for cylinders 1-4.

Specifications and technical data

• SKU: 4H0906262G
• Mark: Audi
• Condition: Used
• OEM Part Number: 4H0906262G
• Substitutable numbers: 4H0906262G, 4H0 906 262 G
• Fuel type: Petrol
• Category: Oxygen Sensors

Function of a Lambda Sensor in a Gasoline Engine

A lambda sensor in a gasoline engine plays a crucial role in the closed-loop control of the powertrain. The sensor measures the oxygen content in the exhaust gases and then transmits a signal to the control unit, which adjusts the fuel dose based on this information. This allows the mixture to be maintained within the optimal range, resulting in:

• stable engine operation across the full load range,
• efficient operation of the exhaust gas purification system,
• reduction of excessive fuel consumption,
• decreased risk of catalytic converter damage.

For gasoline engines, using the appropriate lambda sensor is particularly important during idling, partial load, and dynamic acceleration.

Sensor Construction and Purpose

The presented lambda sensor is equipped with a five-pin connector, enabling precise signal transmission and power supply to the measuring element and heater. This type of solution is used in modern control systems where rapid reading stabilization and high measurement accuracy are required. The sensor is designed for operation in the exhaust system of a gasoline engine, in the area serving cylinders 1-4, which is important for diagnostics and selecting the correct component.

As a product from the Lambda Sensors and O2 Sensors category, it works with the vehicle's control electronics, providing the signal necessary for proper mixture control. A properly functioning sensor reduces the occurrence of errors related to incorrect exhaust gas composition and helps maintain engine operating parameters within the manufacturer's specifications.

Benefits of Using an Original Audi Sensor

Using an original solution dedicated to Audi vehicles allows for consistency with the factory configuration of the control system. This ensures that:

• the engine control unit receives signals with parameters consistent with the manufacturer's design,
• the risk of electrical and software compatibility issues is reduced,
• the predictable operating characteristics of the powertrain are maintained.

For lambda sensors and O2 sensors, selecting a component that matches the vehicle's technical documentation directly impacts the durability of the exhaust system and driving comfort. A correctly chosen sensor helps avoid recurring diagnostic errors and unnecessary interventions in the control unit maps.

Condition, Verification, and Selection by Numbers

This component is a used part from disassembly, offered as a cost-effective solution for users seeking reliable parts at a reasonable price while maintaining compliance with original specifications. For lambda sensors, matching by OEM number and interchangeable numbers, as well as fuel type compatibility, is particularly important. Therefore, before installation, it is advisable to verify the parameters with the vehicle's documentation or VIN number.

If you want to deepen your knowledge on the selection and operation of used sensors and control modules, you will find practical tips in the Global Parts guide: Used Automotive Electronics Onboard – Why Choose Second-Hand ECUs and Sensors?. The article discusses, among other things, principles of selection by OEM numbers, compatibility issues, and common questions related to installation.

Expansion of the Exhaust Measurement System in Audi

If you are planning a comprehensive repair or upgrade of the exhaust system and mixture control area in your Audi and need other components from the same group, such as additional pre- and post-catalyst sensors, O2 sensors for other cylinder banks, or related exhaust control sensors, check the available parts in the Audi Lambda Sensors and O2 Sensors category.

This allows you to build a cohesive set of measuring components, which will facilitate diagnostics, restore correct engine operating parameters, and reduce the risk of repeated service interventions in a short period.