How to service and repair the intake air duct on Mercury Grand Marquis?

The first step for repairing the intake air duct requires users to remove the engine appearance cover through retainer loosening followed by cover removal. Complete the intake air duct service by detaching the idle air control valve inlet tube and the crankcase ventilation hose. The clamping on the air cleaner outlet tube needs to be slightly opened to remove it. Service and repair require the reversed steps of installation. While the instructional diagram shows the gasoline engine setup the maintenance process remains equivalent for the natural gas engine variant.

How to service the air duct by removing the instrument panel on Mercury Cougar?

Service of the air duct requires starting with instrument panel removal that follows dashboard and instrument panel standard procedures. Users should remove the duct once they separate the instrument panel. To install the duct follow all opposite steps used during the removal process.

How to service the intake air duct on Mercury Mariner?

Start the intake air duct servicing process by unplugging the crankcase vent tube from the outlet pipe of the Air Cleaner (ACL). Remove the vacuum tube when it exists from the ACL outlet pipe if necessary. You should start by disconnecting the Mass Air Flow sensor electrical connector in addition to removing the wiring harness retainer. Before removing the ACL outlet pipe, users must loosen the two clamps. You should tighten the clamps until they reach 4 Nm (35 lb-in) while verifying that a proper seal exists on the ACL outlet pipe to stop unmetered air entry into the engine. Complete the installation by performing the reversal of the removal steps.

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Mercury Outlet Tube
Part Number: 4W7Z-9B659-CA
$19.30 MSRP: $26.71
You Save: $7.41 (28%)
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Product Specifications
- Other Name: Hose - Air
Fits the following Mercury Models:
- Grand Marquis | 1998-2002 | GS, LS | 8 Cyl 4.6 L GAS
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Mercury Outlet Tube
Part Number: YF1Z-9B659-BA
$36.85 MSRP: $50.98
You Save: $14.13 (28%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Hose - Air; Engine Air Intake Hose; Intake Coupling; Air Intake Hose
- Manufacturer Note: 4V
Fits the following Mercury Models:
- Sable | 2000-2003 | LS, LS Premium | 6 Cyl 3.0 L GAS
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Mercury Air Inlet Tube, Front
Part Number: 4F1Z-9A624-AA
$14.27 MSRP: $19.74
You Save: $5.47 (28%)
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Product Specifications
- Other Name: Tube Assembly; Engine Air Intake Hose, Front; Intake Coupling; Air Intake Hose
- Position: Front
Fits the following Mercury Models:
- Sable | 2004-2005 | GS, LS, LS Premium, Platinum Edition | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
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Mercury Air Inlet Duct
Part Number: 8L8Z-9B659-A
$44.04 MSRP: $63.00
You Save: $18.96 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Hose - Air; Engine Air Intake Hose; Intake Coupling; Air Inlet Tube; Air Intake Hose
Fits the following Mercury Models:
- Mariner | 2008 | Base | 4 Cyl 2.3 L GAS
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Mercury Outlet Tube
Part Number: 2L8Z-9B659-BA
$24.17 MSRP: $34.28
You Save: $10.11 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Hose - Air; Engine Air Intake Hose; Air Intake Hose; Intake Coupling
- Replaces: YL8Z-9B659-BE
Fits the following Mercury Models:
- Mariner | 2005-2007 | Luxury, Premier | 6 Cyl 3.0 L GAS
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Mercury Outlet Hose
Part Number: AE5Z-9B659-C
Product Specifications
- Other Name: Hose - Air; Engine Air Intake Hose
Fits the following Mercury Models:
- Milan | 2010-2011 | Hybrid | 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV)
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Mercury Outlet Tube
Part Number: 4L2Z-9B659-CA
Product Specifications
- Other Name: Hose - Air; Engine Air Intake Hose
Fits the following Mercury Models:
- Mountaineer | 2004-2005 | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS
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Mercury Outlet Hose, Front
Part Number: 6E5Z-9B659-EA
Product Specifications
- Other Name: Hose - Air; Engine Air Intake Hose, Front
- Position: Front
Fits the following Mercury Models:
- Milan | 2006-2009 | Base, Premier | 4 Cyl 2.3 L GAS
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Mercury Outlet Hose, Front
Part Number: 6E5Z-9B659-GA
Product Specifications
- Other Name: Hose - Air; Engine Air Intake Hose, Front
- Position: Front
Fits the following Mercury Models:
- Milan | 2006-2007 | Base, Premier | 6 Cyl 3.0 L GAS
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Mercury Outlet Hose, Front
Part Number: AE5Z-9B659-B
Product Specifications
- Other Name: Hose - Air; Engine Air Intake Hose, Front
- Position: Front
Fits the following Mercury Models:
- Milan | 2010 | Base, Premier | 4 Cyl 2.5 L GAS
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Mercury Outlet Tube
Part Number: XS8Z-9B659-CA
Product Specifications
- Other Name: Hose - Air; Air Intake Hose; Intake Coupling
- Manufacturer Note: Air meter to throttle body
Fits the following Mercury Models:
- Cougar | 1999-2002 | Base, S, V6 | 6 Cyl 2.5 L GAS
- Mystique | 1998-2000 | LS | 6 Cyl 2.5 L GAS
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Mercury Air Hose, Front
Part Number: 9G1Z-9B659-B
Product Specifications
- Other Name: Hose - Air; Engine Air Intake Hose, Front; Intake Coupling; Air Duct; Air Intake Hose
- Position: Front
- Replaces: 8G1Z-9B659-B
Fits the following Mercury Models:
- Sable | 2008-2009 | Base, Premier | 6 Cyl 3.5 L GAS
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Mercury Vent Hose
Part Number: FODZ-6A664-BA
Product Specifications
- Other Name: Hose - Connecting; Crankcase Breather Hose; Tube
Fits the following Mercury Models:
- Sable | 1992-1993 | GS, LS | 6 Cyl 3.0 L GAS
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Mercury Air Inlet Tube
Part Number: 9L8Z-9B659-AC
$37.63 MSRP: $53.83
You Save: $16.20 (31%)
Product Specifications
- Other Name: Hose - Air; Engine Air Intake Hose; Intake Coupling; Air Intake Hose
Fits the following Mercury Models:
- Mariner | 2009-2011 | Base, Premier | 4 Cyl 2.5 L GAS
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Mercury Outlet Tube
Part Number: 1L2Z-9B659-AC
Product Specifications
- Other Name: Hose - Air; Engine Air Intake Hose
Fits the following Mercury Models:
- Mountaineer | 2002-2003 | Base | 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS
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Mercury Air Outlet Tube
Part Number: 1S4Z-9B659-AA
Product Specifications
- Other Name: Hose - Air
- Manufacturer Note: Air filter housing to throttle body., SOHC
Fits the following Mercury Models:
- Tracer | 1997-1999 | GS, LS, Trio | 4 Cyl 2.0 L GAS
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Mercury Outlet Tube
Part Number: 2L2Z-9B659-CA
Product Specifications
- Other Name: Hose - Air; Engine Air Intake Hose
Fits the following Mercury Models:
- Mountaineer | 2004-2005 | Base, Convenience, Luxury, Premier | 8 Cyl 4.6 L GAS
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Mercury Outlet Tube
Part Number: 3W3Z-9B659-AC
Product Specifications
- Other Name: Hose - Air
- Manufacturer Note: Includes induction resonator., DOHC(Marauder)
Fits the following Mercury Models:
- Marauder | 2003-2004 | Base | 8 Cyl 4.6 L GAS
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Mercury Outlet Tube
Part Number: 4F1Z-9B659-AA
Product Specifications
- Other Name: Hose - Air; Air Intake Hose; Intake Coupling
Fits the following Mercury Models:
- Sable | 2005 | GS | 6 Cyl 3.0 L FLEX
View related parts
Mercury Outlet Tube
Part Number: 4F1Z-9B659-BA
Product Specifications
- Other Name: Hose - Air; Engine Air Intake Hose; Intake Coupling; Air Intake Hose
Fits the following Mercury Models:
- Sable | 2005 | LS, Platinum Edition | 6 Cyl 3.0 L GAS

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Mercury Air Duct Parts Questions & Experts Answers

Air Inlet
F5AZ-9A624-AA
Q: How to service and repair the intake air duct on Mercury Grand Marquis?
A: The first step for repairing the intake air duct requires users to remove the engine appearance cover through retainer loosening followed by cover removal. Complete the intake air duct service by detaching the idle air control valve inlet tube and the crankcase ventilation hose. The clamping on the air cleaner outlet tube needs to be slightly opened to remove it. Service and repair require the reversed steps of installation. While the instructional diagram shows the gasoline engine setup the maintenance process remains equivalent for the natural gas engine variant.
Outlet Tube
F7RZ-9B659-BA
Q: How to service the air duct by removing the instrument panel on Mercury Cougar?
A: Service of the air duct requires starting with instrument panel removal that follows dashboard and instrument panel standard procedures. Users should remove the duct once they separate the instrument panel. To install the duct follow all opposite steps used during the removal process.
Air Inlet Duct
9L8Z-9A675-B
Q: How to service the intake air duct on Mercury Mariner?
A: Start the intake air duct servicing process by unplugging the crankcase vent tube from the outlet pipe of the Air Cleaner (ACL). Remove the vacuum tube when it exists from the ACL outlet pipe if necessary. You should start by disconnecting the Mass Air Flow sensor electrical connector in addition to removing the wiring harness retainer. Before removing the ACL outlet pipe, users must loosen the two clamps. You should tighten the clamps until they reach 4 Nm (35 lb-in) while verifying that a proper seal exists on the ACL outlet pipe to stop unmetered air entry into the engine. Complete the installation by performing the reversal of the removal steps.