How do you replace the Manifold Absolute Pressure sensor on Mercury Mariner?

If you're working on a four-cylinder model, raise the vehicle and support it securely on jackstands. Disconnect the wiring harness from the sensor, which is mounted on the intake manifold on 2009 and later V6 engines. Remove the mounting bolt(s) and take out the sensor, noting that screws on four-cylinder models require a T25 Torx bit. Installation is the reverse of removal.

Genuine Mercury Mariner MAP Sensor

Manifold Air Pressure Sensor

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Mercury Mariner Map Manifold Absolute Pressure Sensor
Part Number: 4S4Z-9F479-AA
$75.68 MSRP: $125.09
You Save: $49.41 (40%)
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Product Specifications
- Other Name: Sensor Assy
- Replaced by: 1S7Z-9F479-AD
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2011 Mercury Mariner | 4 Cyl 2.3L, 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 4 Cyl 2.5L Duratec (110kW/150PS), 4 Cyl 2.5L PFI Gas/Electric | 4AT CD4E, 5-Speed Manual Transmission, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Right Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)
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Mercury Mariner Sensor Assembly
Part Number: 5L8Z-9S428-AA
$36.25 MSRP: $50.36
You Save: $14.11 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assy
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2008 Mercury Mariner | 4 Cyl 2.3L, 6 Cyl 3.0L DOHC EFI Modular | 4AT CD4E, 5-Speed Manual Transmission, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Right Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)
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Mercury Mariner Sensor Assembly
Part Number: 5L8Z-9F479-AA
Product Specifications
- Other Name: Sensor Assy; Map Sensor
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2008 Mercury Mariner | 6 Cyl 3.0L DOHC EFI Modular | 4AT CD4E, 5-Speed Manual Transmission, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Right Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)
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Mercury Mariner Map Sensor
Part Number: 6E5Z-9F479-BA
Product Specifications
- Other Name: Sensor Assy; M.A.P. Sensor
- Replaces: 6E5Z-9F942-BA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009-2011 Mercury Mariner | 6 Cyl 3.0L OHC Duratec | 4AT CD4E, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive

Mercury Mariner MAP Sensor

A MAP Sensor installed in Mercury Mariner vehicles operates as a fundamental mechanism which detects intake manifold positive air pressure data to transmit information to the engine control unit (ECU). The ECU receives this data which enables the engine control unit to make accurate calibrations of fuel injector performance to establish optimal air-fuel combinations for the combustion system. This sensor holds a fundamental position in the speed-density method where fuel metering occurs within fuel-injected internal combustion engines. The choice of MAP Sensor for Mariner models depends on their connection type to other sensors including the forced induction specific mass airflow (MAF) sensors. A driver of Mercury MAP Sensor over boost sensors is their capability to read absolute pressure to provide critical engine performance data which helps both fuel metering and ignition timing systems. The Mercury Mariner MAP Sensor features OBD II diagnostic capabilities to conduct tests on EGR valve elements among other components.

We provide a wide range of Mercury Mariner MAP Sensor at the best prices possible. If you need Mercury Mariner MAP Sensor, you can shop with confidence on our website. All our OEM parts come with a manufacturer's warranty and are delivered to your door step with a fast delivery service.

Mercury Mariner MAP Sensor Parts Questions & Experts Answers

Map Manifold Absolute Pressure Sensor
4S4Z-9F479-AA
Q: How do you replace the Manifold Absolute Pressure sensor on Mercury Mariner?
A:
If you're working on a four-cylinder model, raise the vehicle and support it securely on jackstands. Disconnect the wiring harness from the sensor, which is mounted on the intake manifold on 2009 and later V6 engines. Remove the mounting bolt(s) and take out the sensor, noting that screws on four-cylinder models require a T25 Torx bit. Installation is the reverse of removal.