How to service the ignition coil-on-plug on the LH side on Mercury Grand Marquis?

To check the ignition coil-on-plug to the left side, begin by taking off the air cleaner outlet pipe. Unscrew the electrical connector and unscrew the securing bolt and tighten it to 6 Nm (53 lb-in) when replacing. Last, fit the ignition coil-on-plug and invert the steps to install it.

How to service the ignition coil-on-plug on Mercury Mariner?

To service the ignition coil-on-plug, disconnect the battery ground and ignition coil connectors. Remove the bolts and coils. When installing new coils, tighten bolts to 8 Nm (71 lb-in) and reverse the removal process. Apply dielectric grease inside the coil boots before attaching to spark plugs.

OEM Mercury Ignition Coil

Ignition Coil Resistor

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18 Ignition Coils found

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Mercury Ignition Coil Part Number: F5SZ-12029-B
$90.50 MSRP: $148.91
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Product Specifications
- Other Name: Coil Assembly - Ignition; Direct Ignition Coil Oe Quality; Distributor Less Coil; Direct Ignition Coil; Coil Assembly; Coil
- Replaces: F1SZ-12029-A, F5SZ-12029-A
Fits the following Mercury Models:
- Cougar | 1999-2000, 1992-1997, 1989-1990 | LS, V6, XR-7 | 6 Cyl 2.5 L GAS, 6 Cyl 3.8 L GAS
- Mystique | 1995-2000 | Base, GS, GS Spree, LS, LS Young America | 6 Cyl 2.5 L GAS
- Sable | 1996-2000 | G, GS, LS, LS Premium | 6 Cyl 3.0 L GAS
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Mercury Ignition Coil Part Number: 7U2Z-12029-B
$68.99 MSRP: $115.82
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Product Specifications
- Other Name: Coil Assembly - Ignition; Direct Ignition Coil Oe Quality; Distributor Less Coil; Direct Ignition Coil; Coil Assembly; Coil
- Replaces: 7U2Z-12029-A, DG-484, F1VY-12029-A, F37Z-12029-A, F5LY-12029-A, F5OY-12029-A, F5OY-12029-B, E8TZ-12029-A, YS4Z-12029-AA
Fits the following Mercury Models:
- Cougar | 1994-1997 | XR-7 | 8 Cyl 4.6 L GAS
- Grand Marquis | 1992-1997 | GS, LS | 8 Cyl 4.6 L GAS
- Mountaineer | 1997-2001 | Base | 8 Cyl 5.0 L GAS
- Tracer | 1991-1999 | Base, GS, LS, Trio | 4 Cyl 1.9 L GAS, 4 Cyl 2.0 L GAS
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Mercury Ignition Coil Part Number: 5F2Z-12029-AD
$79.89 MSRP: $131.45
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Product Specifications
- Other Name: Coil Assembly - Ignition; Direct Ignition Coil Oe Quality; Direct Ignition Coil; Coil
- Replaces: 1F2Z-12029-AC
Fits the following Mercury Models:
- Cougar | 2001-2002 | Base, S, V6 | 6 Cyl 2.5 L GAS
- Monterey | 2004-2007 | Base, Convenience, Luxury, Premier | 6 Cyl 4.2 L GAS
- Sable | 2001-2005 | GS, LS, LS Premium, Platinum Edition | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
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Mercury Ignition Coil Part Number: 4M5Z-12029-B
$57.68 MSRP: $94.91
You Save: $37.23 (40%)
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Product Specifications
- Other Name: Coil Assembly - Ignition; Direct Ignition Coil; Direct Ignition Coil Oe Quality; Coil On Plug Coil; Ignition Coil Set; Coil
- Replaces: 4M5Z-12029-BC, DG-507, 4M5Z-12029-A
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 Ignition Coil Part Number: F7PZ-12029-AA
$36.98 MSRP: $58.73
You Save: $21.75 (38%)
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Product Specifications
- Other Name: Coil Assembly - Ignition; Coil
- Replaces: F5FZ-12029-A, F32Z-12029-A, F5ZZ-12029-A
Fits the following Mercury Models:
- Capri | 1985-1986 | 5.0, GS, RS | 4 Cyl 2.3 L GAS, 6 Cyl 3.8 L GAS, 8 Cyl 5.0 L GAS
- Cougar | 1984-1997 | Base, LS, XR-7 | 4 Cyl 2.3 L GAS, 6 Cyl 3.8 L GAS, 8 Cyl 5.0 L GAS
- Lynx | 1984-1987 | Base, GL, GS, L, XR3 | 4 Cyl 1.6 L GAS, 4 Cyl 1.9 L GAS, 4 Cyl 2.0 L DIESEL
- Marquis | 1984-1986 | Base, Brougham | 4 Cyl 2.3 L GAS, 4 Cyl 2.3 L LPG, 6 Cyl 3.8 L GAS
- Sable | 1986-1995 | GS, LS, LTS | 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L GAS, 6 Cyl 3.8 L GAS
- Topaz | 1984-1994 | Base, GS, GS AWD, LS, LS AWD, LTS, LTS AWD, Sport, Sport AWD, XR5, XR5 AWD | 4 Cyl 2.0 L DIESEL, 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mercury Ignition Coil Part Number: FOTZ-12029-A
$83.87 MSRP: $138.00
You Save: $54.13 (40%)
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Product Specifications
- Other Name: Coil Assembly - Ignition; Distributor Less Coil; Coil
- Manufacturer Note: OHV, SOHC
Fits the following Mercury Models:
- Mountaineer | 1998-2010 | 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 Ignition Coil Part Number: 9E5Z-12029-A
$65.20 MSRP: $109.45
You Save: $44.25 (41%)
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Product Specifications
- Other Name: Coil Assembly - Ignition; Direct Ignition Coil; Direct Ignition Coil Oe Quality; Coil On Plug Coil; Coil
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 | 2010-2011 | Base, Hybrid, Premier | 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS
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Mercury Ignition Coil, Brown Part Number: 8L3Z-12029-A
$46.03 MSRP: $73.09
You Save: $27.06 (38%)
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Product Specifications
- Other Name: Coil Assembly - Ignition; Direct Ignition Coil; Direct Ignition Coil Oe Quality; Coil On Plug Coil; Ignition Coil Set; Coil
- Manufacturer Note: With Brown Coil Boots
Fits the following Mercury Models:
- Mountaineer | 2008-2010 | Premier | 8 Cyl 4.6 L GAS
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Mercury Ignition Coil Part Number: 7T4Z-12029-E
$56.13 MSRP: $92.36
You Save: $36.23 (40%)
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Product Specifications
- Other Name: Coil Assembly - Ignition; Direct Ignition Coil; Direct Ignition Coil Oe Quality; Coil On Plug Coil; Coil
Fits the following Mercury Models:
- Sable | 2008-2009 | Base, Premier | 6 Cyl 3.5 L GAS
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Mercury Ignition Coil Part Number: 6E5Z-12029-BA
$79.34 MSRP: $130.55
You Save: $51.21 (40%)
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Product Specifications
- Other Name: Coil Assembly - Ignition; Direct Ignition Coil; Direct Ignition Coil Oe Quality; Coil On Plug Coil
Fits the following Mercury Models:
- Mariner | 2009-2011 | Base, Premier | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
- Milan | 2006-2011 | Base, Premier | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
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Mercury Ignition Coil Part Number: 3W7Z-12029-AA
$55.58 MSRP: $91.45
You Save: $35.87 (40%)
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Product Specifications
- Other Name: Coil Assembly - Ignition; Direct Ignition Coil; Direct Ignition Coil Oe Quality; Coil On Plug Coil; Ignition Coil Set; Coil
- Replaces: 1L2Z-12029-AA, 8W7Z-12029-A, DG-540
Fits the following Mercury Models:
- Grand Marquis | 1998-2011 | 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
- Mountaineer | 2002-2005 | Base, Convenience, Luxury, Premier | 8 Cyl 4.6 L GAS
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Mercury Ignition Coil, Black Part Number: 3L3Z-12029-BA
$49.28 MSRP: $81.09
You Save: $31.81 (40%)
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Product Specifications
- Other Name: Coil Assembly - Ignition; Direct Ignition Coil; Direct Ignition Coil Oe Quality; Coil On Plug Coil; Ignition Coil Set; Coil
- Manufacturer Note: With Black Coil Boots
Fits the following Mercury Models:
- Mountaineer | 2006-2008 | Luxury, Premier | 8 Cyl 4.6 L GAS
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Mercury Ignition Coil Part Number: 6E5Z-12029-AA
$74.52 MSRP: $101.40
You Save: $26.88 (27%)
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Product Specifications
- Other Name: Coil Assembly - Ignition; Direct Ignition Coil; Direct Ignition Coil Oe Quality
Fits the following Mercury Models:
- Milan | 2006-2009 | Base, Premier | 4 Cyl 2.3 L GAS
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Mercury Ignition Coil Part Number: 2M2Z-12029-AC
$68.51 MSRP: $112.73
You Save: $44.22 (40%)
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Product Specifications
- Other Name: Coil Assembly - Ignition; Direct Ignition Coil; Direct Ignition Coil Oe Quality; Coil On Plug Coil
- Replaces: 9L8Z-12029-A, DG-500, DG-539
Fits the following Mercury Models:
- Mariner | 2005-2008 | Base, Luxury, Premier | 6 Cyl 3.0 L GAS
- Montego | 2005-2007 | Luxury, Premier | 6 Cyl 3.0 L GAS
- Sable | 2000-2005 | LS, LS Premium, Platinum Edition | 6 Cyl 3.0 L GAS
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Mercury Ignition Coil Part Number: F5RZ-12029-D
$144.72 MSRP: $243.64
You Save: $98.92 (41%)
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Product Specifications
- Other Name: Coil Assembly - Ignition; Direct Ignition Coil Oe Quality; Distributor Less Coil; Direct Ignition Coil; Coil
- Replaces: F5RZ-12029-C
Fits the following Mercury Models:
- Cougar | 1999-2002 | Base | 4 Cyl 2.0 L GAS
- Mystique | 1995-1999 | Base, GS, GS Spree, LS | 4 Cyl 2.0 L GAS
- Tracer | 1998-1999 | GS, LS, Trio | 4 Cyl 2.0 L GAS
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Mercury Ignition Coil Part Number: 988Z-12029-A
$68.95 MSRP: $113.45
You Save: $44.50 (40%)
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Product Specifications
- Other Name: Coil Assembly - Ignition; Direct Ignition Coil Oe Quality; Distributor Less Coil; Direct Ignition Coil; Coil
- Replaces: XS8Z-12029-AD, XS8Z-12029-AA
Fits the following Mercury Models:
- Mystique | 1999-2000 | GS, LS | 4 Cyl 2.0 L GAS, 6 Cyl 2.5 L GAS
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Mercury Ignition Coil Part Number: 4L7Z-12029-AB
$49.91 MSRP: $83.64
You Save: $33.73 (41%)
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Product Specifications
- Other Name: Coil Assembly - Ignition; Direct Ignition Coil; Direct Ignition Coil Oe Quality; Coil On Plug Coil; Ignition Coil Set; Coil
- Replaces: 4L7Z-12029-AA, 2C6Z-12029-AA
Fits the following Mercury Models:
- Marauder | 2003-2004 | Base | 8 Cyl 4.6 L GAS
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Mercury Ignition Coil Part Number: F5XZ12029AA
Product Specifications
- Other Name: Coil Assembly - Ignition; Coil Assembly
Fits the following Mercury Models:
- Villager | 1993-1998 | GS, LS, Nautica | 6 Cyl 3.0 L GAS

Mercury Ignition Coil Parts and Q&A

Ignition Coil
3W7Z-12029-AA
Q: How to service the ignition coil-on-plug on the LH side on Mercury Grand Marquis?
A: To check the ignition coil-on-plug to the left side, begin by taking off the air cleaner outlet pipe. Unscrew the electrical connector and unscrew the securing bolt and tighten it to 6 Nm (53 lb-in) when replacing. Last, fit the ignition coil-on-plug and invert the steps to install it.
Ignition Coil
2M2Z-12029-AC
Q: How to service the ignition coil-on-plug on Mercury Mariner?
A: To service the ignition coil-on-plug, disconnect the battery ground and ignition coil connectors. Remove the bolts and coils. When installing new coils, tighten bolts to 8 Nm (71 lb-in) and reverse the removal process. Apply dielectric grease inside the coil boots before attaching to spark plugs.