Engine Crankshaft Position Sensor Overview

Prenco 4D-1072 is an engine crankshaft position sensor for select BMW applications. It uses a rectangular female connector with a blade terminal design and a single-wire layout for straightforward electrical connection.

Key Features

• Engine crankshaft position sensor for ignition system signal monitoring
• Rectangular connector with female terminals
• Blade terminal design with 3 terminals
• Single-wire construction with 1 connector
• Mounting bracket not included

Detailed Description

This Prenco crankshaft position sensor, part number 4D-1072, is built for BMW 535i, 735i, 735iL, 635CSi, and 535is applications listed in the fitment data. It is used to read crankshaft position information so the engine control system can manage ignition timing and related engine operation. The connector and terminal layout should be matched carefully during replacement to ensure proper electrical connection. This part cross-references Bosch 9605 and Standard Ignition PC235 for the same application.

What It Is Used For

• Restoring crankshaft position signal output when the original sensor fails
• Addressing intermittent no-start or hard-start conditions tied to sensor signal loss
• Correcting engine misfire or timing-related drivability issues
• Replacing a damaged connector interface or worn electrical terminals
• Supporting accurate ignition control in BMW engine management systems

Installation Notes and Tips

Verify connector shape, terminal count, and wire configuration before installation. Confirm the sensor location and mounting style against the removed part, since no mounting bracket is included. Use the vehicle service procedure for electrical testing and final verification after installation.

Quality Assurance

Prenco 4D-1072 is cataloged as a direct replacement sensor for the listed BMW applications and cross-references established aftermarket and OE-style part numbers for the same use.