Walker 235-1650 Engine Crankshaft Position Sensor

Walker 235-1650 Crankshaft Position Sensor

Walker 235-1650 is an engine crankshaft position sensor for select BMW applications. It provides the signal the engine management system uses to monitor crankshaft position and engine speed, supporting accurate ignition and fuel control.

Built by Walker Products, a long-standing manufacturer of fuel system and engine management components, this sensor reflects the company’s focus on OEM-level specifications and application accuracy. It is a direct-fit option for BMW 533i, 535i, 535is, 635CSi, 735i, M3, M5, and M6 applications listed below.

Key Features

• Engine crankshaft position sensor for select BMW models
• Walker Products part number 235-1650
• Supports crankshaft position and engine speed signal input
• Manufactured to meet or exceed OEM standards and specifications
• Backed by Walker Products engineering, product management, and technical support resources
• Compatible With 1983-1991 BMW applications listed in the fitment section

Vehicle Fitment

• Fits 1988-1991 BMW M3, N/A
• Fits 1985-1989 BMW 635CSi, N/A
• Fits 1985-1988 BMW 535i, N/A
• Fits 1988 BMW 535is, N/A
• Fits 1988 BMW M5, N/A
• Fits 1987-1988 BMW M6, N/A
• Fits 1985-1987 BMW 735i, N/A
• Fits 1983-1984 BMW 533i, N/A

Detailed Description

Walker Products 235-1650 is an engine crankshaft position sensor used in BMW engine management systems that rely on precise crankshaft timing input. This sensor helps the control system determine crankshaft position so ignition timing and fuel delivery can be managed correctly. It is a fitment-based replacement for classic BMW performance and luxury models from the 1980s and early 1990s, including BMW M3, M5, M6, 635CSi, 535i, and 735i applications.

Walker Products has supplied automotive fuel system and engine sensor components since 1946 and manufactures parts for the worldwide aftermarket. The company’s sensor and engine management lines are supported by in-house engineering and product management, with production focused on meeting OEM standards and maintaining application accuracy. This makes 235-1650 a practical choice when replacing a failing crankshaft sensor on the listed BMW vehicles.

This part cross-references Bosch 0261210002 for the same application.

Common Issues This Sensor May Address

• Hard starting or no-start conditions related to crankshaft signal loss
• Intermittent stalling caused by an unstable engine speed signal
• Rough running or misfire concerns tied to incorrect timing input
• Check engine light conditions associated with crankshaft position sensor faults
• Driveability problems on BMW M3, M5, M6, 635CSi, 535i, 735i, and 533i applications

Installation Notes and Tips

Confirm the vehicle’s year, model, and sensor location before ordering. Compare the original connector, mounting style, and routing to the existing sensor to verify application match for Walker 235-1650. Inspect related wiring and connectors during replacement, since damaged harnesses can create the same symptoms as a failed sensor.

Quality Assurance

Walker Products states that its engine management components are manufactured to meet or exceed OEM standards and specifications. The company is ISO 9001 and IATF 16949 certified, with technical support available to help maintain application accuracy and product quality.