What precautions should be taken before servicing the exhaust heat shields for the catalytic converter and muffler on Mercury Grand Marquis?

All maintenance on exhaust heat shields for catalytic converters and mufflers must start by disconnecting the power to the air suspension system to stop the air springs from unintentionally changing height which might cause shifting during work operations. Turn off the air suspension switch before you perform the first step of securely lifting up the vehicle. Check the catalytic converter to find any detached or absent heat shields. Worm clamps F0TZ-5A231-A or W705949-S300 should be used to secure loose heat shields then remove extra clamp ear. Heat shields need installation if they are missing; otherwise, replacing the catalytic converter becomes necessary. Finally, lower the vehicle.

How to Service and Repair the Exhaust Heat Shield on Mercury Mountaineer?

Start by disconnecting the battery cable then raising the vehicle for service and repair operations of the heat shield. Check the catalytic converter together with the muffler for both loose heat shields and missing shield parts. Inside the heat shield repair process both FOTZ-5A231-A or W705949-S300 worm clamps need to be utilized for loose shield attachments followed by cutting away the excess worm clamp ear pieces. The absence of heat shields calls for new heat shield installation but if new heat shields cannot be obtained a new catalytic converter replacement becomes necessary. Bring down the car after completing the battery cable reconnection.

OEM Mercury Exhaust Heat Shield

Heat Shield

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49 Exhaust Heat Shields found

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Mercury Heat Shield, Driver Side Part Number: 3W7Z-9Y427-AA
$15.12 MSRP: $21.45
You Save: $6.33 (30%)
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Product Specifications
- Other Name: Shield - Exhaust Manifold Heat; Exhaust Manifold Heat Shield, Left; Exhaust Heat Shield; Heat Deflector
- Manufacturer Note: Shield exh. manifold, LH
- Position: Driver Side
Fits the following Mercury Models:
- Grand Marquis | 2003-2011 | GS, GSL, Limited Edition, LS, LSE, Ultimate Edition | 8 Cyl 4.6 L FLEX, 8 Cyl 4.6 L GAS
- Marauder | 2003-2004 | Base | 8 Cyl 4.6 L GAS
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Mercury Exhaust Heat Shield, Lower Part Number: F77Z-5K261-AC
$509.62 MSRP: $748.33
You Save: $238.71 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Shield
- Position: Lower
Fits the following Mercury Models:
- Mountaineer | 2002-2005 | Base, Convenience, Luxury, Premier | 8 Cyl 4.6 L GAS
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Mercury Heat Shield, Passenger Side Part Number: YL8Z-5E258-AB
$115.65 MSRP: $168.33
You Save: $52.68 (32%)
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Product Specifications
- Other Name: Shield; Exhaust Manifold Heat Shield, Right; Exhaust Heat Shield
- Position: Passenger Side
Fits the following Mercury Models:
- Mariner | 2008 | Base, Premier | 6 Cyl 3.0 L GAS
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Mercury Heat Shield, Driver Side Part Number: AT4Z-9Y427-A
$17.06 MSRP: $24.20
You Save: $7.14 (30%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Shield - Exhaust Manifold Heat; Catalytic Converter Heat Shield, Left; Exhaust Heat Shield
- Position: Driver Side
- Replaces: 7T4Z-9Y427-B
Fits the following Mercury Models:
- Sable | 2008-2009 | Base, Premier | 6 Cyl 3.5 L GAS
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Mercury Heat Shield Part Number: YL2Z-5G221-AA
$42.99 MSRP: $61.50
You Save: $18.51 (31%)
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Product Specifications
- Other Name: Shield; Exhaust Heat Shield
- Replaces: F87Z-5G221-BA
Fits the following Mercury Models:
- Mountaineer | 1998-2001 | Base | 6 Cyl 4.0 L GAS, 8 Cyl 5.0 L GAS
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Mercury Heat Shield, Center Part Number: 6L2Z-5290-AA
$14.32 MSRP: $19.80
You Save: $5.48 (28%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Shield; Floor Pan Heat Shield, Center; Exhaust Heat Shield; Muffler Shield
- Position: Center
Fits the following Mercury Models:
- Mountaineer | 2006-2010 | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS
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Mercury Exhaust Heat Shield, Front Passenger Side Part Number: 8L2Z-5G220-A
Product Specifications
- Other Name: Shield Assembly; Floor Pan Heat Shield, Front Right; Exhaust Heat Shield, Front; Converter Shield; Upper Shield
- Position: Front Passenger Side
- Replaces: 6L2Z-5G220-AA
Fits the following Mercury Models:
- Mountaineer | 2006-2010 | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS
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Mercury Heat Shield Part Number: 5F9Z-9A462-AA
Product Specifications
- Other Name: Shield - Exhaust Manifold; Exhaust Manifold Heat Shield; Exhaust Heat Shield; Shield - Exhaust Manifold Heat
Fits the following Mercury Models:
- Montego | 2005-2007 | Luxury, Premier | 6 Cyl 3.0 L GAS
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Mercury Heat Shield, Driver Side Part Number: 7T4Z-5E258-A
Product Specifications
- Other Name: Shield; Catalytic Converter Heat Shield, Left; Exhaust Heat Shield, Left; Exhaust Heat Shield
- Position: Driver Side
Fits the following Mercury Models:
- Sable | 2008-2009 | Base, Premier | 6 Cyl 3.5 L GAS
View related parts
Mercury Heat Shield, Passenger Side Part Number: 6L2Z-9A462-AA
Product Specifications
- Other Name: Shield - Exhaust Manifold Heat; Exhaust Manifold Heat Shield, Right; Exhaust Heat Shield
- Position: Passenger Side
Fits the following Mercury Models:
- Mountaineer | 2006-2010 | Luxury, Premier | 8 Cyl 4.6 L GAS
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Mercury Heat Deflector, Driver Side Part Number: F8RZ6311435AA
Product Specifications
- Other Name: Heat Shield
- Position: Driver Side
Fits the following Mercury Models:
- Cougar | 1999-2002 | Base, S, V6 | 4 Cyl 2.0 L GAS, 6 Cyl 2.5 L GAS
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Mercury Heat Shield Part Number: XS4Z-9A462-AA
Product Specifications
- Other Name: Shield - Exhaust Manifold; Exhaust Manifold Heat Shield; Exhaust Heat Shield; Shield - Exhaust Manifold Heat
Fits the following Mercury Models:
- Cougar | 1999-2002 | Base | 4 Cyl 2.0 L GAS
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Mercury Lower Shield Part Number: YL8Z-5E258-AA
Product Specifications
- Other Name: Shield; Catalytic Converter Heat Shield, Lower
- Position: Lower
Fits the following Mercury Models:
- Mariner | 2008 | Hybrid | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV)
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Mercury Exhaust Heat Shield Part Number: 1L2Z-5G221-AC
Product Specifications
- Other Name: Shield
- Manufacturer Note: shield asy. - muffler heat shield
Fits the following Mercury Models:
- Mountaineer | 2002-2005 | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS
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Mercury Heat Shield, Passenger Side Part Number: 1L2Z-9Y427-AA
Product Specifications
- Other Name: Shield - Exhaust Manifold Heat; Exhaust Manifold Heat Shield, Right; Exhaust Heat Shield
- Position: Passenger Side
Fits the following Mercury Models:
- Mountaineer | 2002-2005 | Base, Convenience, Luxury, Premier | 8 Cyl 4.6 L GAS
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Mercury Heat Shield, Driver Side Part Number: 2C5Z-9Y427-AA
Product Specifications
- Other Name: Shield - Exhaust Manifold Heat; Exhaust Manifold Heat Shield, Left; Exhaust Heat Shield
- Position: Driver Side
- Replaces: 1L2Z-9Y427-BA
Fits the following Mercury Models:
- Mountaineer | 2002-2005 | Base, Convenience, Luxury, Premier | 8 Cyl 4.6 L GAS
View related parts
Mercury Exhaust Heat Shield, Passenger Side Part Number: 2L2Z-5G220-AA
Product Specifications
- Other Name: Shield Assembly
- Manufacturer Note: Converter Shield
- Position: Passenger Side
Fits the following Mercury Models:
- Mountaineer | 2002-2005 | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS
View related parts
Mercury Exhaust Heat Shield, Driver Side Part Number: 2L2Z-5H207-AA
Product Specifications
- Other Name: Heat Shield
- Manufacturer Note: Converter Shield
- Position: Driver Side
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 Converter Shield, Front Lower Driver Side Part Number: 3L2Z-5E258-AA
Product Specifications
- Other Name: Shield; Catalytic Converter Heat Shield, Front Right Upper; Front Left Lower; Front Left Upper; Exhaust, Front
- Position: Front Lower Driver Side
Fits the following Mercury Models:
- Mountaineer | 2002-2010 | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS
View related parts
Mercury Converter Shield, Front Lower Passenger Side Part Number: 3L2Z-5E258-BA
Product Specifications
- Other Name: Shield; Catalytic Converter Heat Shield, Front Right Lower
- Position: Front Lower Passenger Side
Fits the following Mercury Models:
- Mountaineer | 2002-2010 | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS

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Mercury Exhaust Heat Shield

If you own Mercury and want to keep it in top shape, choosing OEM Exhaust Heat Shield is a smart move. They are precisely engineered and follow strict factory standards. They are made in advanced facilities that use cutting edge technology. Each part goes through thorough testing to confirm strength and safety, so you can trust it. FordPartsDeal.com gives you genuine Mercury Exhaust Heat Shield at some of the affordable online prices without cutting quality. Every OEM Mercury part includes the manufacturer's warranty, easy returns, and super-fast delivery. So why wait? Shop now and get your vehicle back to peak condition.

Mercury Exhaust Heat Shield Parts and Q&A

Heat Shield, Driver Side
3W7Z-9Y427-AA
Q: What precautions should be taken before servicing the exhaust heat shields for the catalytic converter and muffler on Mercury Grand Marquis?
A:
All maintenance on exhaust heat shields for catalytic converters and mufflers must start by disconnecting the power to the air suspension system to stop the air springs from unintentionally changing height which might cause shifting during work operations. Turn off the air suspension switch before you perform the first step of securely lifting up the vehicle. Check the catalytic converter to find any detached or absent heat shields. Worm clamps F0TZ-5A231-A or W705949-S300 should be used to secure loose heat shields then remove extra clamp ear. Heat shields need installation if they are missing; otherwise, replacing the catalytic converter becomes necessary. Finally, lower the vehicle.
Heat Shield
YL2Z-5G221-AA
Q: How to Service and Repair the Exhaust Heat Shield on Mercury Mountaineer?
A:
Start by disconnecting the battery cable then raising the vehicle for service and repair operations of the heat shield. Check the catalytic converter together with the muffler for both loose heat shields and missing shield parts. Inside the heat shield repair process both FOTZ-5A231-A or W705949-S300 worm clamps need to be utilized for loose shield attachments followed by cutting away the excess worm clamp ear pieces. The absence of heat shields calls for new heat shield installation but if new heat shields cannot be obtained a new catalytic converter replacement becomes necessary. Bring down the car after completing the battery cable reconnection.