BMW E90 E92 E93 LCI M3 Camshaft Position Sensor 7837904

The BMW M3 E90 E92 E93 Camshaft Position Sensor is an original engine control system component designed for M3 series models of the E90, E92, and E93 generations. Precise camshaft position reading is crucial for stable engine operation, which is why choosing an original BMW sensor ensures proper engine performance parameters. This item, from the Miscellaneous category, is a practical solution for diagnosing and repairing the timing system in sporty BMW versions.

Specifications and technical data

• SKU: 7837904
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7837904
• Substitutable numbers: 7837904, 13627837904
• Category: Other Engine Parts

Camshaft Position Sensor Purpose and Function

The camshaft position sensor in the BMW M3 E90/E92/E93 is responsible for providing the engine control unit with information about the camshaft's current position. Based on this, the control system adjusts the fuel injection timing and ignition angle, which affects:

• stable idle operation,
• proper throttle response across the entire RPM range,
• efficient utilization of the M3 engine's power,
• reduction of errors logged in the ECU's memory.

If the sensor malfunctions, issues with starting, power loss, or entering limp mode may occur. Replacing it with a functional, original part is then the primary service action.

Why Use an Original BMW Sensor

Using components that comply with factory specifications is particularly important in high-performance engines like the M3. An original BMW camshaft position sensor ensures:

• accurate signal for the engine control unit,
• compatibility with the factory ECU software,
• appropriate operating characteristics across the full temperature range,
• compatibility with the wiring harness and cylinder head mounting.

This minimizes the risk of adaptation problems, sensor errors, and incorrect operation of the variable valve timing system.

Condition, Origin, and Service Application

The presented sensor is an original BMW part sourced from disassembly. This is a practical solution when seeking a component with factory characteristics while also aiming for a reasonable repair cost. This type of part is particularly useful for:

• repairs following camshaft sensor errors,
• preventative replacement at higher mileages,
• restoring factory configuration in track-used vehicles,
• service by specialized workshops dealing with M3 models.

It is always advisable to verify the correct sensor by part number and compare it with the component installed in the vehicle before making a selection.

Integration with the M3 Engine Control System

The camshaft position sensor works directly with the engine control system, so its correct operation impacts many operational parameters. A properly selected component helps maintain:

• smooth transitions between different valve timing phases,
• appropriate dynamics at high RPMs characteristic of the M3,
• stable fuel consumption and exhaust emission values,
• consistent operation with other engine sensors.

Sensor replacement is a typical service operation that should be combined with computer diagnostics and wiring harness inspection.

Related Categories and Technical Materials

If you are looking for other BMW Miscellaneous category items for your car, check out the BMW Miscellaneous available in our store, where you will find a wide selection of original components for various models of this brand.

To compare the characteristics of sporty designs, it is worth familiarizing yourself with comparative material regarding high-performance engines – useful information can be found in the blog post Audi RS vs. Other Models – What Lies Under the Hood and Chassis?, which discusses differences in the construction of engines, brakes, and chassis in cars with similar purposes.

Summary

The BMW M3 E90 E92 E93 Camshaft Position Sensor is a functional, original engine control system component designed for the sporty M3 models of the E9x generation. Using a factory sensor helps maintain proper valve timing, stable RPMs, and full engine performance, which is crucial for both daily driving and dynamic performance.