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MAS4540 MASS AIR FLOW METER Fits: Ford Lincoln Mazda Mercury
MAS4540 MASS AIR FLOW METER Fits: Ford Lincoln Mazda Mercury
MAS4540 MASS AIR FLOW METER Fits: Ford Lincoln Mazda Mercury
MAS4540 MASS AIR FLOW METER Fits: Ford Lincoln Mazda Mercury
MAS4540 MASS AIR FLOW METER Fits: Ford Lincoln Mazda Mercury
MAS4540 MASS AIR FLOW METER Fits: Ford Lincoln Mazda Mercury
MAS4540 MASS AIR FLOW METER Fits: Ford Lincoln Mazda Mercury
MAS4540 MASS AIR FLOW METER Fits: Ford Lincoln Mazda Mercury

MAS4540 MASS AIR FLOW METER Fits: Ford Lincoln Mazda Mercury

$20.99 
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YOU ARE BUYING BRAND: ISUMO
PREMIUM AFTER MARKET HIGH QUALITY PART 
MASS AIR FLOW SENSOR 
(SENSOR ONLY)
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Part#
3L3Z-12B579BA
3L3A-12B579BA
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Cross-Reference
MAS0140
86-50031
8650031
74-50031
7450031
213-3604
2133604
AF10140
5S8314
917-822
917822
3W4F12B579AC
4G7Z12B579AA
L3A12B579BA
3L3F12B579BA
3L3Z12B579BA
3L8Z12B579BA 
L3H513215 
L3H5-13-215
SU8751
SU9779
3W4F12B579AB 
245-1108
MAS4540
MAF1142  
2451108 
245-1108
MAF1108
MAS4540
MAS4540S
MAS4540NH
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  • Specifications
  • Connector Gender:Female
  • Terminal Gender:Male
  • Terminal Type:Pin
  • Notes:Sensor Only
  • Connector Quantity:1
  • Terminal Quantity:6
  • Connector Shape:Oval
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FITS:
FORD CROWN VICTORIA 2005-2011
FORD E-150 2004-2012
FORD E-250 2004-2012
FORD E-350 2004-2015
FORD E-450 2004-2015
FORD ECONOLINE 2004
FORD EDGE 2007-2015
FORD ESCAPE 2005-2012
FORD EXPEDITION 2005-2011
FORD EXPLORER 2004-2012
FORD EXPLORER SPORT TRAC 2007-2010
FORD F-150 2004-2010
FORD F-150 HERITAGE 2004
FORD F-250 SUPER DUTY 2005-2010
FORD F-350 2007-2009
FORD F-350 SUPER DUTY 2005-2010
FORD F-450 SUPER DUTY 2005-2010
FORD F-550 SUPER DUTY 2005-2010
FORD F53 2006-2009
FORD FIESTA 2011-2013
FORD FIVE HUNDRED 2005-2007
FORD FLEX 2009-2012
FORD FOCUS 2008-2011
FORD FREESTYLE 2005-2007
FORD FUSION 2006-2012
FORD MUSTANG 2005-2010
FORD RANGER 2004-2013
FORD TAURUS 2008-2012
FORD TAURUS X 2008-2009
FORD TRANSIT CONNECT 2010-2013
LINCOLN LS 2003-2006
LINCOLN MKS 2009-2012
LINCOLN MKT 2010-2012
LINCOLN MKX 2007-2014
LINCOLN MKZ 2007-2012
LINCOLN NAVIGATOR 2006-2011
LINCOLN TOWN CAR 2005-2011
LINCOLN ZEPHYR 2006
MAZDA 6 2009-2013
MAZDA CX-9 2007-2015
MAZDA TRIBUTE 2005-2011
MERCURY GRAND MARQUIS 2005-2011
MERCURY MARINER 2005-2011
MERCURY MILAN 2006-2011
MERCURY MOUNTAINEER 2006-2010
MERCURY SABLE 2008-2009

Mass Air Flow Meter (MAF)
The Mass Air Flow (MAF) sensor is located in the air duct between the air cleaner 
and the engines air intake. Location may be mounted to the throttle body or in the air cleaner 
housing.
The MASS Air Flow sensor is a computer input that measures the amount of 
air entering the engine. Barometric pressure may also be calculated either in the sensor or by 
the computer for correct air/fuel mixture. The computer uses this information for air/fuel 
mixture control, ignition timing and to aid the transmission in pressure control for accurate 
shifting. 
Failure Symptoms: Malfunction Indicator Light  illumination, failed emission test, 
engine hesitation on acceleration, poor fuel economy, poor engine performance, engine nostart condition, engine surging
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