Mercedes A C W168 W169 W203 Petrol Engine Camshaft Position Sensor A0041539628

Mercedes A C W168 W169 W203 Petrol Engine Camshaft Position Sensor is a precision timing system component designed for Mercedes petrol engines. It is responsible for accurately monitoring the camshaft position, which enables the engine control unit to function correctly, ensuring stable engine operation and predictable throttle response. This used component from the Camshafts category provides a functional solution for professional repair or diagnostics of the power unit.

Specifications and technical data

• SKU: A0041539628
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0041539628
• Substitutable numbers: A0041539628, A 004 153 96 28, BG
• Fuel type: Petrol
• Category: Camshafts

Purpose and role in the timing system

The camshaft position sensor in Mercedes W168, W169, and W203 models works with the petrol engine control system by transmitting information about the current camshaft position. Based on this, the controller determines the fuel injection and ignition timing, which affects:

• correct synchronization of valves and pistons,
• stable idle speed,
• efficient engine starting in both cold and warm conditions,
• reduction of ignition errors and ECU emergency mode.

A properly functioning camshaft position sensor is particularly important in petrol engines, where ignition precision directly translates into engine performance and fuel consumption.

Benefits of using an original Mercedes sensor

Using a sensor dedicated to specific Mercedes generations allows for maintaining factory engine operating parameters. The original design ensures:

• proper geometric fit to the cylinder head and timing cover,
• correct signal characteristics for the engine control unit,
• compatibility with the vehicle's electrical system without modifications.

As a result, installation is straightforward, and the risk of ECU communication issues is minimized. This is a practical solution when replacing a component following diagnostic errors related to the camshaft position.

Performance characteristics and application in petrol engines

The sensor has been designed for units powered by petrol, where a fast and repeatable ignition system response is required. In practice, this translates into:

• more predictable acceleration across the entire rev range,
• reduced susceptibility to jerking at low speeds,
• better cooperation with traction control and stabilization systems.

In Mercedes compact and mid-size vehicles, such as the W168, W169, or W203, a functional camshaft position sensor is one of the key elements for maintaining proper engine operation in daily city and highway driving.

Condition, verification, and service application

The offered sensor belongs to the used parts group, which allows for economical repair while maintaining the manufacturer's original specifications. This type of component is often chosen by workshops specializing in the Mercedes brand as a service solution for:

• the appearance of errors related to camshaft and crankshaft synchronization,
• problems with starting or engine stalling,
• diagnostics of faults within the timing system.

Thanks to the preservation of the factory design, the sensor can be installed as a replacement for a damaged component without the need to modify the wiring harness or mounts.

Related components and additional information

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

For a broader perspective on selecting aftermarket components and comparing popular service solutions across different car models, it is worth reading our guide: The best used car parts – a guide to the most frequently chosen original parts.