Audi A4 B8 2.0 TDI Diesel Camshaft Position Sensor 03L971497

Audi A4 B8 2.0 TDI Diesel Camshaft Position Sensor is a precision component of the diesel engine control system, responsible for accurately determining the position of the camshaft relative to the crankshaft. A properly functioning sensor ensures stable engine operation, correct fuel dosing, and precise injection synchronization, which translates into efficient engine starting and smooth idling. Choosing an original component from the Camshafts group allows you to maintain engine performance parameters at the level intended by the manufacturer.

Specifications and technical data

• SKU: 03L971497
• Mark: Audi
• Condition: Used
• OEM Part Number: 03L971497
• Substitutable numbers: 03L971497, 03L 971 497
• Fuel type: Diesel
• Category: Camshafts

The role of the camshaft position sensor in a diesel engine

The camshaft position sensor in a diesel engine works with the control module, providing it with a signal regarding the current position of the camshaft relative to the cylinder operating cycle. Based on this, the controller selects the fuel injection timing and advance angle, which is crucial for:

• maintaining appropriate power and torque,
• reducing smoke and improving engine refinement,
• reducing fuel consumption while maintaining stable idle speed,
• proper operation of OBD diagnostic systems.

In the event of an incorrect signal from the sensor, problems with starting, jerking during acceleration, or synchronization error codes in the controller's memory may occur. Using a functional component restores proper cooperation between the timing system and the engine electronics.

Benefits of using an original sensor in the Audi A4 B8 2.0 TDI

Selecting a sensor dedicated to the specific Audi A4 B8 2.0 TDI engine ensures proper electrical and mechanical parameters, consistent with factory specifications. As a result:

• the engine controller receives a stable, repeatable reference signal,
• compatibility with the factory ECU software is maintained,
• the risk of random errors and limp mode is reduced,
• the engine maintains its intended performance characteristics across the full rev range.

Combined with a correctly set timing system and a functional injection system, such a sensor supports stable, predictable throttle response and proper operation of emission control systems.

Installation and operational characteristics

The presented camshaft position sensor is a component designed for the timing system in a diesel engine, which means it is adapted to the specific operating conditions of a Diesel unit: increased combustion pressure, vibrations, and temperature changes. The design integrated with the harness and connector allows for:

• secure seating in the socket in the cylinder head or timing cover,
• stable electrical connection with the vehicle's wiring,
• easy diagnostics using standard service tools.

Proper installation involves keeping the socket clean, correctly routing the cable, and checking the working distance of the sensor relative to the pulse element on the camshaft. This makes it possible to maintain precise camshaft position reading over a long period of operation.

Why consider a used camshaft position sensor

In the case of electronic components such as a camshaft position sensor, a used component can be a reasonable compromise between cost and functionality, especially when it comes from the same model family and is consistent with factory parameters. This type of solution is often chosen for:

• comparative diagnostics (swapping the component to confirm a fault),
• budget repairs in vehicles with higher mileage,
• restoring full system functionality after a mechanical timing failure.

More practical information on selecting and operating used modules and sensors can be found in our guide: Used automotive electronics – ECU modules and second-hand sensors, where issues such as compatibility, part numbers, and installation procedures are discussed.

Expanding Audi timing system service

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as additional sensors, control elements, or components working with the timing system, check the available parts in the Audi Camshafts category.