How to service the spark plugs on Mercury Grand Marquis?

The ignition coil-on-plug should not be damaged with tools other than hand tools so that removing the ignition coil-on-plugs cannot be performed. Squegeegee debris under compressed air and then removal. Check the plugs, replace or recheck them, tighten the plugs to 18 Nm (13 lb-ft) and change the gap as necessary, following the same steps in reverse.

How should you inspect a spark plug for issues such as bridged gaps, deposit build-up, and signs of pre-ignition on Mercury Mariner?

Inspect the spark plug for bridged gaps and deposit build-up from oil or carbon fouling. Clean as needed and check for oil or carbon fouling signs. Ensure normal burning with light tan deposits. Look for pre-ignition or overheating signs, and replace spark plugs if necessary. Check for fused deposits from sudden acceleration.

OEM Mercury Spark Plug

Ignition Spark Plug

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18 Spark Plugs found

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Mercury Spark Plug Part Number: PZK-1F
$10.25 MSRP: $20.73
You Save: $10.48 (51%)
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Product Specifications
- Replaced by: PZK-1F-X
Fits the following Mercury Models:
- Mountaineer | 2006-2007 | Luxury, Premier | 8 Cyl 4.6 L GAS
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Mercury Spark Plug Part Number: AGSF-22F-1MX
$5.10 MSRP: $8.27
You Save: $3.17 (39%)
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Product Specifications
- Replaces: AGSF-22F-CM, AGSF-22F-1M
Fits the following Mercury Models:
- Mariner | 2008 | Base, Premier | 6 Cyl 3.0 L GAS
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Mercury Spark Plug Part Number: HJFS-24FP-X
$9.73 MSRP: $15.06
You Save: $5.33 (36%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: SP-509, HJFS-24FP
Fits the following Mercury Models:
- Mountaineer | 2008-2010 | Premier | 8 Cyl 4.6 L GAS
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Mercury Spark Plug Part Number: CGSF-22N-A1X
$4.20 MSRP: $6.67
You Save: $2.47 (38%)
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Product Specifications
- Replaces: CGSF-22N, SP-518, CGSF-22N-A1, CGSF-22F, SP-511, SP-518-A
Fits the following Mercury Models:
- Mariner | 2009-2011 | Base, Premier | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
- Milan | 2010-2011 | Premier | 6 Cyl 3.0 L FLEX
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Mercury Spark Plug Part Number: AZFS-32F-EX
$7.67 MSRP: $12.45
You Save: $4.78 (39%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: AZFS-32F-EF4, AZFS-32F-E
Fits the following Mercury Models:
- Cougar | 1999-2002 | Base | 4 Cyl 2.0 L GAS
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Mercury Spark Plug Part Number: AYFS-32Y-RX
$11.41 MSRP: $17.65
You Save: $6.24 (36%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: AYFS-32Y-R, SP-490, SP-530, AYSF-32Y-PC
Fits the following Mercury Models:
- Mariner | 2009-2011 | Base, Hybrid, Premier | 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS
- Milan | 2006-2011 | Base, Hybrid, Premier | 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS
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Mercury Spark Plug Part Number: AYFS-22F-MX
$5.13 MSRP: $8.15
You Save: $3.02 (38%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: AYFS-22F-M, SP-411
Fits the following Mercury Models:
- Sable | 2008-2009 | Base, Premier | 6 Cyl 3.5 L GAS
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Mercury Spark Plug Part Number: AGSP-32F-PX
$7.91 MSRP: $12.84
You Save: $4.93 (39%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: High Ignitability Spark Plug
- Replaces: AGSP-32F-P
Fits the following Mercury Models:
- Villager | 1999-2002 | Base, Estate, Sport | 6 Cyl 3.3 L GAS
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Mercury Spark Plug Part Number: AGSF-42F-MX
$5.40 MSRP: $8.58
You Save: $3.18 (38%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: AGSF-42F-M, SP-486
Fits the following Mercury Models:
- Monterey | 2004-2007 | Base, Convenience, Luxury, Premier | 6 Cyl 4.2 L GAS
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Mercury Spark Plug Part Number: AGSF-32Y-RAX
$7.93 MSRP: $12.27
You Save: $4.34 (36%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: AGSF-32Y-PC, AGSF-32Y-R, AGSF-32Y-RA, SP-541, SP-541-A, SP-448
Fits the following Mercury Models:
- Mariner | 2005-2008 | Base, Convenience, Hybrid | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.3 L GAS
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Mercury Spark Plug Part Number: AGSF-32W-MX
$5.73 MSRP: $8.87
You Save: $3.14 (36%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: AGSF-32W-, AGSF-32W-M, AGSF-32W-MF4, SP-433
Fits the following Mercury Models:
- Marauder | 2003-2004 | Base | 8 Cyl 4.6 L GAS
- Mariner | 2005-2007 | Luxury, Premier | 6 Cyl 3.0 L GAS
- Milan | 2006-2009 | Base, Premier | 6 Cyl 3.0 L GAS
- Montego | 2005-2007 | Luxury, Premier | 6 Cyl 3.0 L GAS
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Mercury Spark Plug Part Number: AGSF-32P-MX
$6.04 MSRP: $9.35
You Save: $3.31 (36%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: AGSF-32P-M, AGSF-32P-MF4, SP-493
Fits the following Mercury Models:
- Grand Marquis | 2003-2011, 1998-2000 | GS, GSL, Limited Edition, LS, LSE, Ultimate Edition | 8 Cyl 4.6 L FLEX, 8 Cyl 4.6 L GAS
- Mountaineer | 2002-2005 | Base, Convenience, Luxury, Premier | 8 Cyl 4.6 L GAS
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Mercury Spark Plug Part Number: AGSF-32F-MX
$5.41 MSRP: $8.36
You Save: $2.95 (36%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: AGSF-32F-SM, AGSF-32F-M, SP-470-X, SP-470, SP-432, AGSF-32F-SMX, AWSF-32F-
Fits the following Mercury Models:
- Cougar | 1999-2002 | Base, S, V6 | 6 Cyl 2.5 L GAS
- Grand Marquis | 1995-1997 | GS, LS | 8 Cyl 4.6 L GAS
- Mountaineer | 1997-2001 | Base | 8 Cyl 5.0 L GAS
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Mercury Spark Plug Part Number: AGSF-32C-X
$3.80 MSRP: $5.87
You Save: $2.07 (36%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: AWSFA-32C, AGSF-32C, SP-447-A, SP-447, AGSF-32C-A
Fits the following Mercury Models:
- Grand Marquis | 1992 | GS, LS | 8 Cyl 4.6 L GAS
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Mercury Spark Plug Part Number: AGSF-24N-X
$4.22 MSRP: $6.53
You Save: $2.31 (36%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: SP-412, AGSF-24N
Fits the following Mercury Models:
- Mountaineer | 2006-2010 | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L GAS
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Mercury Spark Plug Part Number: AGSF-22F-M1X
$4.98 MSRP: $8.09
You Save: $3.11 (39%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: AWSF-22F-M, AWSF-22F-M1, AGSF-22F-M1, SP-405
Fits the following Mercury Models:
- Grand Marquis | 2007-2011 | GS, LS | 8 Cyl 4.6 L FLEX, 8 Cyl 4.6 L GAS
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Mercury Spark Plug Part Number: AGSF-22Y-PCX
$11.26 MSRP: $17.87
You Save: $6.61 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaces: AGSF-22Y-PC, SP-492
Fits the following Mercury Models:
- Mariner | 2006-2007 | Hybrid | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV)
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Mercury Spark Plug Part Number: AGSF-22F-MX
$5.52 MSRP: $8.76
You Save: $3.24 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaces: SP-500, AGSF-22F-M
Fits the following Mercury Models:
- Mountaineer | 1998-2005 | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS

Mercury Spark Plug Parts and Q&A

Spark Plug
AGSF-22F-M1X
Q: How to service the spark plugs on Mercury Grand Marquis?
A: The ignition coil-on-plug should not be damaged with tools other than hand tools so that removing the ignition coil-on-plugs cannot be performed. Squegeegee debris under compressed air and then removal. Check the plugs, replace or recheck them, tighten the plugs to 18 Nm (13 lb-ft) and change the gap as necessary, following the same steps in reverse.
Spark Plug
AGSF-32Y-RAX
Q: How should you inspect a spark plug for issues such as bridged gaps, deposit build-up, and signs of pre-ignition on Mercury Mariner?
A: Inspect the spark plug for bridged gaps and deposit build-up from oil or carbon fouling. Clean as needed and check for oil or carbon fouling signs. Ensure normal burning with light tan deposits. Look for pre-ignition or overheating signs, and replace spark plugs if necessary. Check for fused deposits from sudden acceleration.