BMW Crankshaft Position Sensor 11377506503 for 1 & 3 Series, X1, X3, Z4 Models

This BMW crankshaft position sensor is a critical engine management component designed to replace a faulty unit. Carrying the specific part number 11377506503, it is intended for a range of BMW vehicles, including the 1 Series and 3 Series, as well as the X1, X3, and Z4 models. The sensor's primary function is to monitor the rotational position and speed of the crankshaft, sending this vital data to the engine control unit (ECU) to manage ignition timing and fuel injection. A failing sensor can lead to engine misfires, stalling, or difficulty starting, making this a key part for maintaining engine performance and reliability.

Features and Construction

This automotive sensor is presented as a direct replacement component for the specified BMW models. Its construction is focused on providing the necessary electrical signals to the vehicle's engine management system.

Material and Build

The sensor is built from standard automotive-grade materials suitable for the engine bay environment, designed to handle vibration, heat, and exposure to fluids. It features a black housing, which is typical for such components. The internal elements are engineered to accurately detect the position of the crankshaft, typically using a magnetic or Hall effect principle to generate a signal as the crankshaft rotates.

Size and Practical Fit

This part is manufactured to the original equipment specifications for a correct mechanical and electrical fitment. It is crucial to verify the compatibility with your specific vehicle's model, year, and engine code, even within the listed model ranges (1, 3, X1, X3, Z4), to ensure it matches the mounting points and connector type. Always consult your vehicle's service manual or a professional for confirmation.

Uses and Placement

The crankshaft position sensor plays a fundamental role in the engine's operation. It is usually located on the engine block, near the crankshaft pulley or flywheel, where it can read a trigger wheel or reluctor ring.

Event or Professional Use

For professional mechanics and automotive workshops, this sensor is a standard service item used to rectify engine running issues. Symptoms prompting replacement include the illumination of the check engine light, erratic idling, stalling, or a complete failure to start. Accurate diagnosis using an OBD-II scanner is recommended before replacement to confirm the sensor is the root cause.

Everyday Home Use

For the knowledgeable DIY enthusiast with the correct tools and technical information, this sensor can be a cost-effective solution to a common engine fault. The replacement process generally involves locating the sensor, disconnecting its electrical plug, removing the mounting bolt(s), and installing the new unit. Care must be taken not to damage the connector pins or the sensor itself during handling.

Benefits and Buying Value

Purchasing this specific sensor offers a targeted solution for BMW owners experiencing related engine management faults.

Reuse and Low Maintenance

As a solid-state electronic component, the sensor itself requires no maintenance once installed. Its value lies in restoring the original function of the engine management system, which helps maintain optimal engine performance and fuel efficiency. A correctly functioning sensor contributes to the overall longevity of the engine by ensuring precise timing.

Why Choose This Product

This product provides a direct replacement option identified by its official BMW part number 11377506503. Its stated applicability for multiple popular BMW model series (1, 3, X1, X3, Z4) makes it a relevant part for a wide audience of BMW owners and repairers. The primary advantage is the restoration of a critical engine signal, resolving performance issues and potential warning lights.