Walker 245-2204 Mass Air Flow Sensor
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Walker
 Walker Mass Air Flow Sensor

Walker 245-2204 Mass Air Flow Sensor

Brand Walker 245-2204
Product line Walker Mass Air Flow Sensor
Fits Mercury · 2 vehicles

OE-standard quality. Manufactured to meet or exceed OEM specifications.

Engine sensor expertise. Walker has supplied fuel system and engine management parts since 1946.

Mass air flow sensor. Measures incoming air for precise engine management.

Cross-references Hitachi Automotive MAF0043, 3W3F12B579AA and 3W3Z12B579AA for the same application. See all 5.

$83.42Free shipping
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Walker Mass Air Flow Sensor 245-2204

Walker Mass Air Flow Sensor 245-2204 is a direct-fit engine management component for precise air measurement and consistent fuel control. It is compatible with 2003-2004 Mercury Marauder applications and supports accurate airflow signal delivery for drivability-focused repairs.

Walker Products has supplied fuel system and engine sensor components since 1946, with manufacturing and engineering support aimed at meeting or exceeding OEM standards. The Walker Mass Air Flow Sensor line is built for accurate vehicle applications and dependable replacement service in the aftermarket.

  • Direct-fit mass air flow sensor for Mercury Marauder applications
  • Supports accurate intake air measurement for engine control
  • OE-style replacement for 2003-2004 Mercury Marauder
  • Part number 245-2204 for catalog and service matching
  • Walker engineering and technical support behind the product line

Detailed Product Overview

Mass air flow sensors measure the amount of air entering the engine so the control system can calculate fuel delivery. When the sensor signal becomes inaccurate, the vehicle may experience rough idle, hesitation, reduced fuel economy, or diagnostic trouble codes. Walker 245-2204 provides a replacement option for 2003-2004 Mercury Marauder models that need a reliable airflow sensor service part. This part cross-references Hitachi Automotive MAF0043 for the same application.

Common Issues This Part May Resolve

  • Rough idle or unstable engine speed
  • Acceleration hesitation or poor throttle response
  • Check engine light related to airflow measurement
  • Incorrect fuel trim caused by faulty air metering
  • Reduced drivability in 2003-2004 Mercury Marauder vehicles

Installation Notes and Tips

Verify the connector style, housing shape, and OE part number before installation. Inspect the intake tract for contamination, loose clamps, or air leaks that can affect sensor readings. After replacement, clear diagnostic codes if present and confirm idle quality and airflow data with a scan tool.

Quality Assurance

Walker Products is an ISO 9001/IATF16949 certified manufacturer with in-house product management and engineering support. The brand states its components are produced to meet or exceed OEM standards and specifications.

Related reading

This part fits 2 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2004MercuryMarauder4.6LV8N/AWalker Mass Air Flow Sensor
2003MercuryMarauder4.6LV8N/AWalker Mass Air Flow Sensor
Directly replaces or cross-references 5 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Hitachi Automotive — MAF00433W3F12B579AA3W3Z12B579AA3W3Z12B579AARM3W7Z12B579AA