Audi A4 B8 A5 8T Oil Pressure Sensor Switch Control Unit 2.0 Diesel 03C919081B

Audi A4 B8 A5 8T Oil Pressure Sensor Switch Control Unit 2.0 Diesel is an original component from the Engine sensors and switches group, designed to monitor lubrication parameters in diesel units. Precise oil pressure reading is crucial for protecting the diesel engine against seizing and allows the control unit to react quickly in case of irregularities.

Specifications and technical data

• SKU: 04L919081-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 04L919081
• Substitutable numbers: 04L919081, 04L 919 081
• Fuel type: Diesel
• Part type: Sensor
• Category: Engine Sensors & Switches

Function and application of the oil pressure sensor

The oil pressure sensor in a diesel engine is responsible for the ongoing measurement of pressure in the lubrication system and transmitting the signal to the control unit and the instrument cluster. In practice, this means:

• early warning to the driver about a drop in oil pressure,
• protection of critical engine components against insufficient lubrication,
• stable operation of the power unit under various load conditions.

In Audi A4 B8 and A5 8T models with a 2.0 Diesel engine, a properly functioning oil pressure sensor is essential for the durability of the power unit and the correct operation of diagnostic systems.

Benefits of using an original Audi sensor

Using an original sensor from the Audi group ensures the correct signal characteristics and electrical compatibility with the vehicle's installation. This translates into:

• stable oil pressure readings without false alarms,
• proper cooperation with the factory diesel engine control unit,
• maintenance of the factory operating parameters of the power unit.

For users who value the consistency of components with the original specification, such a sensor is a safe and technically sound choice.

Installation and operational characteristics

The oil pressure sensor designed for Audi diesel engines is structurally adapted to the socket in the block or the lubrication system housing, which facilitates installation for the mechanic. In practice, this means:

• maintaining proper tightness of the oil system,
• correct positioning of the measuring element relative to the oil channel,
• no need for modifications to the electrical installation.

When replacing the sensor, it is worth paying attention to the condition of the electrical connector and wires to fully utilize the potential of the newly installed component.

Product condition and application in diesel engines

The offered sensor is a used component, which allows for an economical repair of the lubrication system while maintaining the original Audi specification. For diesel engines operating under higher thermal and mechanical loads, a functional oil pressure sensor is of particular importance for operational safety.

In the case of planned diagnostics or refreshing the power unit, it is worth considering a simultaneous check of other lubrication system components, such as the oil pump or filter, to ensure a consistent service effect.

Related components and further information

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other components from the same group, such as oil temperature sensors, pressure switches, or additional engine operation sensors, check the available parts in the Audi engine sensors and switches category.

For a better understanding of how the condition of accessories affects the lifespan of the power unit, an article describing the refreshment of a popular diesel engine may be helpful – you can find more information in the post Second life of the Mercedes OM642 engine – how injectors and a turbocharger restore the power of the 3.0 V6 CDI.