BMW Crankshaft Phase Eccentric Shaft Sensor: OEM Replacement Part 11377506503

This automotive sensor is produced as a direct replacement for the crankshaft phase eccentric shaft sensor in several BMW models. It carries the original equipment manufacturer (OEM) part number 11377506503, indicating its design intent is to match the specifications and performance of the factory-fitted component. The sensor plays a role in the engine management system by providing data on crankshaft position, which is critical for functions like ignition timing and fuel injection sequencing. It is supplied as a single unit with a black exterior, ready for professional installation by a technician. The primary application is for vehicles where the existing sensor has failed or requires replacement to maintain optimal engine operation and diagnostic accuracy.

Features and Construction

This replacement sensor is defined by its technical specifications and intended application rather than detailed material breakdowns. Its core feature is adherence to a specific OEM part number, which guides its compatibility and fit.

Material and Build

The source information specifies the sensor's finish as black, but does not detail the internal materials or electronic construction. As a replacement part bearing an OEM number, its build is focused on functional compatibility with the vehicle's engine control unit (ECU) and physical mounting points. The design prioritises accurate signal output corresponding to crankshaft rotation and phase, which is essential for the engine's management algorithms.

Size and Practical Fit

Physical dimensions are not provided in the source text. The fit is determined by the part number's correspondence to the original BMW component. It is engineered to interface correctly with the sensor mounting location on the engine and connect to the vehicle's wiring harness without modification, facilitating a straightforward swap-out procedure for the faulty part.

Uses and Placement

This sensor has a single, defined purpose within the vehicle's engine bay. Its use is tied directly to the specific models listed, and installation requires technical knowledge.

Event or Professional Use

The primary use case is as a service part during vehicle maintenance or repair. It is installed by automotive technicians in workshops or dealerships when diagnosing issues related to engine running faults, poor starting, or illuminated check engine lights that trace back to a faulty crankshaft position sensor. Correct installation ensures the ECU receives reliable data, which is necessary for proper engine performance and passing emissions-related diagnostics.

Everyday Home Use

This component is not typically considered a consumer-installable item for everyday home use. Its installation involves working on the engine, often requiring specialised tools and access to vehicle-specific service data or diagnostic equipment to confirm the fault and verify correct installation afterwards. For the knowledgeable home mechanic with appropriate tools and technical resources, it represents a potential repair solution.

Benefits and Buying Value

The value of this component lies in its specification-matching design and defined application, offering a targeted solution for a specific repair scenario.

Reuse and Low Maintenance

The sensor itself is not a reusable or maintainable item in the traditional sense; it is a sealed electronic unit. Its value in reuse pertains to the vehicle—replacing a failed sensor restores a critical engine function, allowing the car to be driven again. A correctly functioning sensor contributes to sustained engine performance and can prevent further issues that might arise from incorrect timing data.

Why Choose This Product

Choosing this sensor is appropriate when you need a replacement part that corresponds exactly to BMW part number 11377506503 for one of the listed models (1 Series, 3 Series, X1, X3, Z4). It provides a focused solution for that specific repair need. The key decision factors are the confirmed part number match and model compatibility, rather than broader comparative features not supported by the source information.