Mercedes W204 Camshaft Adjuster Position Sensor A0009050343

The Mercedes W204 Camshaft Position Sensor is a precise engine control system component responsible for accurately determining the camshaft's position. This allows the engine control unit (ECU) to correctly synchronize fuel injection and ignition, resulting in stable engine operation and reliable starting. A used genuine sensor is a sensible choice for servicing when you want to maintain factory engine performance parameters.

Specifications and technical data

• SKU: A0009050343
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0009050343
• Substitutable numbers: A0009050343, A 000 905 03 43
• Location on the vehicle: Front
• Category: Other Car Parts & Accessories

Function and Role of the Camshaft Position Sensor

The Mercedes W204 Camshaft Position Sensor works in conjunction with the impulse wheel on the camshaft, generating a signal used by the ECU to control camshaft phasing. A properly functioning sensor enables:

• maintenance of stable idle speed,
• precise fuel metering across the entire RPM range,
• correct synchronization of ignition and injection,
• reduction of the risk of the engine entering limp mode.

If this component is damaged, starting problems, jerking during acceleration, or an illuminated engine warning light may occur. Replacing it with a functional sensor restores correct control logic and increases operational confidence.

Vehicle Location and Installation Aspects

The presented sensor is designed for installation in the front section of the vehicle, within the engine compartment. Its front placement facilitates service access, reducing replacement time and the need to dismantle additional components.

When selecting and installing, pay attention to:

• compatibility with the specific engine version of the Mercedes W204,
• the condition of the electrical connector and wiring harness,
• the cleanliness of the mounting socket and proper seating of the sensor.

A correctly chosen component from this group allows for the preservation of factory engine performance parameters without the need for adaptation or wiring modifications.

Product Characteristics and Origin

The sensor comes from the Mercedes brand, ensuring compliance with original quality and fitment standards. A used component of this type is particularly attractive when you aim for:

• maintaining the vehicle's original specification,
• cost-effective repairs compared to a new part,
• preserving compatibility with the existing engine control unit.

By maintaining the original geometry and electrical parameters, the sensor works seamlessly with the factory ECU software, minimizing the risk of diagnostic errors and adaptation issues.

Selection and Diagnostics in the Powertrain Context

When replacing the camshaft position sensor, it is advisable to perform basic computer diagnostics to confirm the source of the fault and rule out damage to the wiring harness or other components of the timing system. For more extensive engine work, a guide on purchasing engine system components may be helpful – practical tips can be found in the article How to Buy a Used Car Engine and Avoid Pitfalls – A Step-by-Step Guide, which covers aspects such as assessing component condition and common traps when buying used powertrain parts.

If you are interested in comparing the characteristics of advanced powertrains and their equipment in sports cars, it is worth reviewing the analysis of differences in engine, brake, and chassis construction in the article Audi RS vs. Other Models – What Lies Under the Hood and Chassis?, which demonstrates the importance of precise sensor operation in modern control systems.

Expanding Service within the Same Component Group

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and require other components from the same group, such as additional position sensors, wiring harness elements, or auxiliary sensors, check the available parts in the Other Mercedes category.