Walker 235-1638 Engine Crankshaft Position Sensor

Engine Crankshaft Position Sensor Overview

Walker Products 235-1638 is an engine crankshaft position sensor for select Audi applications. It is built to meet or exceed OEM standards and specifications, with engineering and technical support backed by Walker Products’ long-running aftermarket experience.

Compatible With 2005-2011 Audi A4, Audi A4 Quattro, Audi A6, Audi A6 Quattro, and Audi A8 Quattro applications listed below, this sensor supports accurate crankshaft signal input for engine management systems. Part number 235-1638 is also cross-referenced to Standard Ignition PC697 for the same application.

Key Features

• Engine crankshaft position sensor for ignition and engine management systems
• Walker Products part number 235-1638
• Manufactured to meet or exceed OEM standards and specifications
• Backed by Walker Products engineering, product management, and technical support
• ISO 9001/IATF16949 certified manufacturing environment
• Cross-reference: Standard Ignition PC697

Vehicle Fitment

• Fits 2006-2011 Audi A6, N/A
• Fits 2005-2011 Audi A6 Quattro, N/A
• Fits 2007-2010 Audi A8 Quattro, N/A
• Fits 2006-2008 Audi A4, N/A
• Fits 2005-2008 Audi A4 Quattro, N/A
• Fits 2005 Audi A4, N/A, Sensor Only

What This Sensor Helps Address

• Crankshaft position signal loss
• Hard starting or no-start conditions related to crank signal input
• Engine misfire or rough running caused by incorrect timing data
• Stalling or intermittent drivability concerns tied to sensor output
• Check engine light concerns associated with crankshaft position sensor faults

Installation Notes and Tips

Verify the vehicle application by year, make, model, and notes before ordering. Compare the original sensor connector and mounting style to the replacement part number 235-1638, and inspect the harness and related engine management components during service. For the 2005 Audi A4 listing, note the fitment remark “Sensor Only.”

Quality Assurance

Walker Products has supplied fuel system and engine sensor components since 1946 and supports its products with in-house manufacturing, product management, engineering, and technical documentation. The company states that its parts are produced to meet or exceed OEM standards and specifications and are manufactured under ISO 9001/IATF16949 certification.