Mercedes W204 C207 W212 C218 W251 Camshaft Position Sensor M276 A2769050143

Mercedes W204 C207 W212 C218 W251 Camshaft Position Sensor M276 is a precision component from the Engine sensors and switches category, designed for use in Mercedes M276 engine units. It is responsible for accurately monitoring the camshaft position, which is crucial for stable engine operation, correct fuel injection timing, and ignition. This used component allows for a technically sound and cost-effective repair of the timing control system without the need for new, more expensive parts.

Specifications and technical data

• SKU: A2769050143
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2769050143
• Substitutable numbers: A2769050143, A 276 905 01 43
• Location on the vehicle: Rear, Left
• Part type: Sensor
• Color: Chrome
• Category: Engine Sensors & Switches

Purpose and function of the camshaft position sensor

The offered sensor is dedicated to M276 engines used in Mercedes C, E, CLS, and R-Class models, where it works with the engine control system by transmitting information about the current camshaft position. Based on the signal from this component, the engine control unit adjusts:

• fuel injection timing,
• ignition advance angle,
• operation of variable valve timing systems.

A functional camshaft position sensor helps reduce issues with rough engine idling, power loss, or starting difficulties on a warm engine. As such, it is an important element in preventing more costly failures in the timing and engine control area.

Design, location, and performance features

The presented sensor belongs to the Engine sensors and switches group and is designed for installation in the rear, left part of the engine unit, in accordance with the manufacturer's original design. This placement ensures accurate camshaft position readings and stable operating conditions in the immediate vicinity of the cylinder head.

The Chrome-colored housing gives the component an aesthetic, organized look in the engine bay, while also facilitating visual identification during service. The construction is prepared to work with the factory Mercedes electrical harness, which helps maintain proper connector sealing and minimizes the risk of signal interference.

Benefits of using an original Mercedes sensor

Using an original camshaft position sensor in an M276 engine provides a number of practical service and operational benefits:

• High compatibility with the factory engine control unit – operating parameters are matched to the injection and ignition maps used by the manufacturer.
• Stable measurement signal – improves engine performance across the entire RPM range.
• Reduction of the risk of diagnostic errors related to camshaft position.
• Possibility of cost-effective repair through the use of a used, functional component.

For workshops and individual users, this means a more predictable repair process and a lower risk of needing to re-intervene in the timing system due to an incorrectly selected replacement part.

Condition, verification, and preparation for installation

The item is offered as used, which allows for a significant reduction in repair costs while maintaining the functionality required for daily operation. Before being offered for sale, the sensor is visually inspected for mechanical damage to the housing and the electrical connector. As a result, the user receives a component ready for further operation in the vehicle.

Installation by an experienced service center is recommended, adhering to the manufacturer's procedures regarding tightening torques and electrical harness routing. A correctly installed camshaft position sensor supports stable engine operation and facilitates subsequent computer diagnostics.

Integration with other engine system components

Replacing the camshaft position sensor often accompanies other work in the cylinder head and timing area, such as checking the timing chain, tensioners, or variable valve timing sprockets. High engine operating temperatures place additional stress on electronic and mechanical components, which is why it is worth taking care of the entire system that works with the sensor.

To better understand the impact of temperature on the durability of components in the engine bay and the importance of efficient cooling for the lifespan of sensors and accessories, it is worth reading the guide Summer heat vs. cooling system: used radiators and fans as a guarantee of savings. This will allow you to consciously plan the service of both the cooling system and the engine's electronic components.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other items from the same group, such as additional position sensors, switches, or auxiliary sensors, check the available parts in the Mercedes engine sensors and switches category.