Hella 009121711 Engine Camshaft Position Sensor for Mercedes-Benz

The Hella 009121711 is an OE-quality engine camshaft position sensor engineered for Mercedes-Benz applications. This Hall-effect sensor continuously monitors camshaft rotational position and transmits that data to the engine control unit (ECU), enabling precise calculation of fuel injection timing and ignition point for optimal engine performance and efficiency.

How It Works:

Operating on the Hall principle, the sensor scans a ring gear mounted on the camshaft. As the ring gear rotates, it alters the Hall voltage within the sensor's integrated circuit. This voltage change is relayed to the ECU, which uses the signal — in combination with crankshaft position data — to determine top dead center for the first cylinder and optimize engine timing in real time.

Key Features:

• Hall-effect sensor technology for accurate, interference-resistant position detection
• 12V rated operating voltage compatible with standard automotive electrical systems
• 3-pin connector with single mounting bore for direct OE-style installation
• Black finish matching original equipment color
• Built to meet or exceed OEM specifications for fit, form, and function
• Designed to withstand high engine bay temperatures, vibration, and harsh operating conditions

Manufacturer Part Number: 009121711 | Hella part family: 6PU 009 121-711

Hella is a globally recognized OE supplier to major automotive manufacturers, bringing that same factory-level engineering quality to the aftermarket. Professional installation is recommended; ensure the o-ring is replaced and the mounting bolt is torqued to specification during installation.