Walker 210-91051 Air Charge Temperature Sensor

Walker Air Charge Temperature Sensor 210-91051

Walker Products air charge temperature sensor 210-91051 is built for import engine management applications that require accurate intake air temperature input. It supports proper fuel and ignition control on select Audi and Volkswagen models, including Audi A4, A4 Quattro, A6, A6 Quattro, Allroad Quattro, S4, TT, TT Quattro, and Volkswagen Beetle, Golf, Jetta, and Passat.

Walker Products FSK focuses on engine sensors and fuel system components manufactured to meet or exceed OEM standards. The 210-91051 part number is backed by Walker’s engineering and product management support, with manufacturing practices aligned to ISO 9001 and IATF 16949 quality systems.

Key Features

• Air charge temperature sensor for engine management systems
• Direct-fit application coverage for select Audi and Volkswagen vehicles
• Supports accurate intake air temperature signal input to the ECU
• Walker Products FSK line for fuel system and sensor applications
• Part number 210-91051 for catalog and service reference

Detailed Description

The Walker 210-91051 air charge temperature sensor is used in intake and engine management circuits where the control module relies on air temperature data to adjust fueling and timing. Accurate sensor input is important on turbocharged and naturally aspirated import platforms, including Audi A4 and Volkswagen Passat applications listed in the fitment data. This part cross-references SU6304DG for the same application.

Walker Products has supplied automotive fuel system and engine sensor components since 1946, with a focus on OE-style manufacturing standards, application accuracy, and technical support. If you are replacing a faulty air charge temperature sensor on an Audi TT Quattro, Audi Allroad Quattro, or Volkswagen Jetta, part number 210-91051 provides a cataloged replacement option for the listed vehicles.

What It Helps Solve

• Incorrect intake air temperature readings
• Rough idle or drivability concerns tied to sensor signal errors
• Fuel mixture issues caused by inaccurate air temperature data
• Check engine light conditions related to air charge temperature sensor faults
• Hard starting or hesitation linked to engine management input problems

Installation Notes and Tips

• Verify the vehicle’s year, model, and VIN break before ordering, especially for 2003 Audi and Volkswagen applications with chassis limits.
• Confirm the sensor connector and mounting style match the original part before installation.
• Inspect the intake tract and wiring for damage, corrosion, or contamination that could affect sensor readings.
• Clear diagnostic trouble codes after installation and verify live data to confirm proper operation.

Quality Assurance

Walker Products manufactures engine sensors and fuel system components to meet or exceed OEM standards and specifications. The company supports production with in-house manufacturing, engineering, and technical documentation resources, and operates under ISO 9001/IATF 16949 certified quality systems.