Walker 245-2135 Mass Air Flow Sensor

Walker Mass Air Flow Sensor 245-2135

Walker Mass Air Flow Sensor 245-2135 is a direct-fit engine management sensor for select Nissan, INFINITI, and Mercury applications. It is built to meet or exceed OEM standards and specifications, with application data and technical support backed by Walker Products’ engineering and product management teams.

The Walker Mass Air Flow Sensor line focuses on accurate airflow measurement for proper fuel delivery and drivability. This part number, 245-2135, is a fitment-based replacement for vehicles such as the Nissan Frontier, Nissan Xterra, Nissan Quest, Nissan Pathfinder, Nissan Pickup, INFINITI QX4, and Mercury Villager.

Key Features

• Mass Air Flow Sensor for emission control and engine management systems
• 3-terminal design with female connector
• Mounting hardware included
• No housing included
• Built to Walker Products’ OEM-focused specifications
• Cross-reference: Delphi AF10134

Detailed Description

Walker 245-2135 is a replacement mass air flow sensor for vehicles that rely on precise intake air measurement to maintain correct air-fuel calculations. Walker Products has supplied fuel system and engine sensor components since 1946 and manufactures this sensor within an ISO 9001/IATF16949 certified quality system. The result is a service part intended for accurate fitment and dependable signal output in the applications listed below.

Compatible With: 1998-2000 Nissan Pickup, 1998-2000 Nissan Pathfinder, 1998-2000 INFINITI QX4, 1999-2002 Nissan Quest, 1999-2002 Mercury Villager, 1999-2004 Nissan Frontier, and 2000-2004 Nissan Xterra. If you are replacing a failing Nissan Frontier mass air flow sensor or sourcing a Walker Mass Air Flow Sensor for a Nissan Xterra, part number 245-2135 is the application-specific reference to verify.

What It Helps Address

• Rough idle caused by inaccurate airflow readings
• Hesitation or stumble during acceleration
• Check engine light related to air metering faults
• Poor fuel economy from incorrect fuel delivery calculations
• Driveability issues tied to a contaminated or failing MAF sensor

Installation Notes

Verify connector style, terminal count, and vehicle application before installation. This sensor uses a female connector and 3 terminals, and it does not include a housing. Inspect the intake tract for dirt, oil residue, or air leaks before replacing the sensor, since contamination can affect airflow readings and repeat failure. Confirm the part number 245-2135 against the original unit and vehicle service information for the exact application.

Quality Assurance

Walker Products supports this sensor with in-house manufacturing, engineering, and technical documentation processes. The brand states that its components are produced to meet or exceed OEM standards and specifications, with quality control aligned to ISO 9001/IATF16949 certification.