Walker 235-1858 Engine Crankshaft Position Sensor

Walker 235-1858 Crankshaft Position Sensor

Walker Products 235-1858 is an engine crankshaft position sensor built for accurate engine timing signal input and reliable ignition system operation. It is a direct-fit replacement for select Mazda applications, including the 2009-2011 Mazda RX-8 and 2019 Mazda CX-5.

Key Features

• Engine crankshaft position sensor for ignition and engine management systems
• Built by Walker Products, a long-time supplier of fuel system and engine sensor components
• Manufactured to meet or exceed OEM standards and specifications
• Supported by Walker’s manufacturing, engineering, and technical teams
• Compatible with select Mazda RX-8 and Mazda CX-5 applications
• Part number 235-1858 for accurate catalog matching

Product Details

Walker Products 235-1858 is part of the Walker Products engine sensor line, which includes cam and crankshaft sensors, throttle position sensors, oxygen sensors, fuel injectors, and related engine management components. Walker Products has supplied automotive fuel system and sensor parts since 1946 and operates as an ISO 9001/IATF16949 certified manufacturer. This sensor is intended for vehicles that require a crankshaft position signal for proper engine control, including the Mazda RX-8 and Mazda CX-5 listed in the fitment data. Cross-reference part numbers include Standard Ignition PC857.

Vehicle Fitment

• Fits 2019 Mazda CX-5, N/A
• Fits 2009-2011 Mazda RX-8, N/A

Common Issues This Part May Resolve

• Crankshaft position sensor fault codes
• Hard starting or extended crank time
• Intermittent stalling or engine shutdown
• Rough running caused by an unstable engine speed signal
• Ignition timing and engine control signal errors

Installation Notes

Verify the connector style, mounting location, and engine application before installation. Compare the old sensor to Walker 235-1858 and confirm the vehicle year, make, and model against the fitment list. Clear diagnostic trouble codes after installation and perform a road test to confirm proper engine operation.

Quality Assurance

Walker Products manufactures engine sensors to meet or exceed OEM standards and specifications. The company backs its parts with in-house manufacturing, product management, engineering, and technical support resources, and its facilities are certified to ISO 9001/IATF16949 standards.