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

Audi A4 B8 A5 8T 2.0 TDI Diesel Oil Pressure Sensor 03C919081B is an original part from the Engine Sensors and Switches group, designed for diesel engines. Precise oil pressure measurement is crucial for protecting the powertrain, making the selection of the right sensor important for both routine repairs and lubrication system diagnostics. This component ensures stable operation with the engine electronics in Audi vehicles.

Specifications and technical data

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

Function and Role of the Oil Pressure Sensor in a Diesel Engine

The oil pressure sensor in a 2.0 TDI engine is responsible for transmitting information about the current pressure in the lubrication system to the control unit. Based on this signal, the system can:

• monitor the proper operation of the oil pump and oil passages,
• activate a warning light in case of pressure drop,
• support engine protection strategies, reducing the risk of seizure.

Thanks to this component, the driver receives a clear signal about potential irregularities, and the engine itself is better protected against costly damage resulting from insufficient lubrication.

Designed for Diesel Engines

The presented sensor has been designed for Diesel engines, where the operating conditions of the lubrication system are particularly demanding. Diesel units generate high mechanical and thermal loads, so stable oil pressure readings are important for:

• maintaining an adequate oil film on moving parts,
• proper turbocharger operation,
• extending the lifespan of bearings, crankshaft, and timing components.

Selecting a sensor dedicated to a specific fuel type supports correct interaction with the vehicle's control unit maps and diagnostic logic.

Benefits of Using an Original Audi Sensor

A part from the Engine Sensors and Switches group originating from Audi ensures compatibility with the factory electrical system and threads in the engine block. In practice, this means:

• a secure electrical connection with the vehicle's wiring harness,
• appropriate signal characteristics for the engine control unit,
• reduced risk of diagnostic errors and false alarms.

Using an OEM component is a sensible compromise between cost and quality – you maintain the factory operating parameters of the system while optimizing your repair budget.

Used Condition and Installation Aspects

The sensor is offered in used condition, allowing for an economical repair while maintaining the original manufacturer's specifications. Before installation, a standard inspection of the socket in the engine block or oil filter housing is recommended, along with verification of connection tightness after installation. A correctly selected and installed sensor supports stable operation of the lubrication system and facilitates subsequent computer diagnostics.

Technical Support, Diagnostics, and Educational Content

When working on diesel engines, it's also worth paying attention to other systems that affect exhaust emissions and powertrain durability. To deepen your knowledge of components that work with diesel engines, you can consult the guide: EGR: What it is and why it's worth considering used EGR valves. This article helps to better understand the relationships between individual components and their impact on vehicle operation.

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

Additionally, when choosing parts from dismantling, it's worth considering the environmental and economic aspects. If you are interested in how using used parts – such as sensors, valves, or engine components – contributes to waste reduction and service cost savings, read the article Circular Economy in Your Garage – How Choosing Used Parts from Dismantling Truly Supports Environmental Protection and Your Wallet?.