Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSINFINITI2008FX45 AWD V8-4.5L (VK45DE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSSENSORS AND SWITCHES - COMPUTERS AND CONTROL SYSTEMSAIR FLOW METER/SENSORSERVICE AND REPAIR
2008 Infiniti FX45 AWD V8-4.5L (VK45DE)
Air Flow Meter/Sensor: Service and Repair
2008 Infiniti FX45 AWD V8-4.5L (VK45DE)SECTION Service and Repair
AIR CLEANER AND AIR DUCT
Removal and Installation
REMOVAL
1. Remove engine cover with power tool.
2. Disconnect harness connector from mass air flow sensor.
3. Disconnect vacuum hose and PCV hose.
4. Remove air duct (inlet), power duct, air cleaner case and mass air flow sensor assembly, air duct and resonator assembly disconnecting their joints.
^ Add marks as necessary for easier installation.
5. Remove mass air flow sensor from air cleaner case.
CAUTION:
Handle mass air flow sensor with following cares.
^ Do not shock it.
^ Do not disassemble it.
^ Do not touch its sensor.
INSPECTION AFTER REMOVAL
Inspect air duct and resonator assembly for crack or tear.
^ If anything found, replace air duct and resonator assembly.
INSTALLATION
Note the following, and install in the reverse order of removal.
^ Align marks. Attach each joint. Screw clamps firmly.
EM-173 Component:
Removal and Installation
REMOVAL
1. Remove engine cover with power tool.
2. Disconnect harness connector from mass air flow sensor.
3. Disconnect vacuum hose and PCV hose.
4. Remove air duct (inlet), power duct, air cleaner case and mass air flow sensor assembly, air duct and resonator assembly disconnecting their joints.
^ Add marks as necessary for easier installation.
5. Remove mass air flow sensor from air cleaner case.
CAUTION:
Handle mass air flow sensor with following cares.
^ Do not shock it.
^ Do not disassemble it.
^ Do not touch its sensor.
INSPECTION AFTER REMOVAL
Inspect air duct and resonator assembly for crack or tear.
^ If anything found, replace air duct and resonator assembly.
INSTALLATION
Note the following, and install in the reverse order of removal.
^ Align marks. Attach each joint. Screw clamps firmly.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.