HomeEmission Control > SensorsWalker 245-1257 Mass Air Flow Sensor
Part #: 245-1257

Walker 245-1257 Mass Air Flow Sensor

Walker Mass Air Flow Assembly
6 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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OE Direct Replacement — Bolt-on fit, no modifications needed
Walker Mass Air Flow Assembly
Fitment: INFINITI, FX45, M45, and Q45
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Walker Mass Air Flow Assembly 245-1257

The Walker Mass Air Flow Assembly 245-1257 is designed specifically for INFINITI FX45, M45, and Q45 models. This mass air flow sensor includes a housing and features a 5-terminal female connector, ensuring precise airflow measurement for optimal engine performance.

  • Includes housing for secure installation
  • 5-terminal female connector for reliable electrical connection
  • Compatible with INFINITI FX45, M45, and Q45
  • Mounting hardware not included
  • Part number 245-1257 for accurate identification

About the Walker Mass Air Flow Assembly Product Line

The Walker Mass Air Flow Assembly product line focuses on providing accurate and durable sensors for emission control systems. This line is engineered to meet OEM specifications, ensuring compatibility and performance for vehicles requiring precise air intake measurement. The 245-1257 sensor is part of this line, offering a reliable solution for maintaining proper engine air-fuel mixture in select INFINITI models.

Detailed Product Description

This mass air flow sensor measures the amount of air entering the engine, which is critical for the engine control unit to adjust fuel delivery accurately. The included housing protects the sensor element from contaminants and physical damage. With a 5-terminal female connector, the sensor ensures a stable electrical interface with the vehicle’s wiring harness. Although mounting hardware is not included, the sensor is designed to fit securely in the factory location on INFINITI FX45, M45, and Q45 models.

Common Issues Addressed by This Mass Air Flow Sensor

  • Engine hesitation or stalling due to incorrect air measurement
  • Reduced fuel efficiency caused by improper air-fuel mixture
  • Check engine light triggered by faulty mass air flow readings
  • Rough idle or poor acceleration in INFINITI FX45, M45, and Q45
  • Emission control problems related to inaccurate airflow data

Installation Notes and Tips

  • Ensure the sensor housing is clean and free of debris before installation
  • Verify the 5-terminal female connector matches the vehicle’s wiring harness
  • Use OEM or compatible mounting hardware as it is not included
  • Handle the sensor carefully to avoid damage to the sensing element
  • Follow vehicle-specific service manual instructions for proper installation

Quality Assurance and Warranty

The Walker Mass Air Flow Assembly 245-1257 is manufactured to meet industry standards for emission control sensors. While specific warranty details are not provided here, Walker products typically undergo rigorous testing to ensure durability and performance. Confirm warranty coverage with the product documentation or supplier at the time of purchase.

BrandWalker
Part Number245-1257
PositionWalker Mass Air Flow Assembly
Connector GenderFemale
Housing IncludedYes
Mounting Hardware IncludedNo
Terminal Quantity5

This part fits 6 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2004INFINITIFX454.5LV8N/AWalker Mass Air Flow Assembly
2004INFINITIM454.5LV8N/AWalker Mass Air Flow Assembly
2004INFINITIQ454.5LV8N/AWalker Mass Air Flow Assembly
2003INFINITIFX454.5LV8N/AWalker Mass Air Flow Assembly
2003INFINITIM454.5LV8N/AWalker Mass Air Flow Assembly
2003INFINITIQ454.5LV8N/AWalker Mass Air Flow Assembly

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

22680AR20022680AR20A5S29666418027410132MAF0101MAS0372SU6525

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.