How to remove and replace the Engine Control Module (ECM) on Mercury Grand Marquis?

The replacement process of Powertrain Control Module (PCM) requires all customer keys for programming during installation since PCM replacement does not necessitate new keys. Follow the required procedure to obtain the module configuration through necessary module configuration retrieval steps. After releasing the clips you should disconnect the three PCM electrical connectors. Untighten and remove the bolt which holds the PCM in position before extracting the module. Install the PCM by placing it correctly then fasten it with the bolt and tighten it to 10 Nm (89 lb-in). Reinstall the three PCM electrical connector clips after reconnecting them all. You should complete module configuration retrieval steps to restore the module configuration. The completion of passive anti-theft system (PATS) reprogramming requires users to perform the Key Programming Using Two Programmed Keys procedure.

How to service the Engine Control Module on Mercury Mariner?

The first step for Engine Control Module service calls for disconnecting the battery ground cable. Start by unfastening the powertrain control module (PCM) stud bolt nut before setting the wiring harness to the side. You should disconnect the three PCM electrical connectors followed by removing the two stud bolts which secure the PCM. Reinstallation requires installation of stud bolts to a torque of 9 Nm (80 lb-in). After removal of the PCM cowl seal follow the opposite removal steps while tightening the stud bolts to 9 Nm (80 lb-in).

OEM Mercury Engine Control Module

Engine Control Computer

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213 Engine Control Modules found

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Mercury Control Module Part Number: 1U2Z-12A199-AA
$58.04 MSRP: $93.64
You Save: $35.60 (39%)
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Product Specifications
- Other Name: Module Assembly - Ignition Amplifier; Ignition Control Module; Ignition Module; ECM
- Replaces: D9VZ-12A199-A, DY-683, E9VZ-12A199-A, F2PZ-12A199-AA
Fits the following Mercury Models:
- Bobcat | 1980 | 2.3L L4
- Capri | 1980-1985 | 2.3L L4, 3.3L V6, 3.8L V6, 4.2L V8, 5.0L V8
- Cougar | 1980-1986 | 2.3L L4, 3.3L V6, 3.8L V6, 4.2L V8, 5.0L V8
- Grand Marquis | 1980-1986 | Base, Colony Park, LS | 4.2L V8, 5.0L V8, 5.8L V8, 8 Cyl 5.0 L GAS, 8 Cyl 5.8 L GAS
- LN7 | 1982 | 1.6L L4
- Lynx | 1981-1982 | 1.6L L4
- Marquis | 1983-1986 | Base, Brougham | 2.3L L4, 3.3L V6, 3.8L V6, 4 Cyl 2.3 L GAS, 4 Cyl 2.3 L LPG, 6 Cyl 3.8 L GAS
- Topaz | 1984-1991 | Base, GS, GS AWD, LS, LS AWD, LTS, LTS AWD, Sport, Sport AWD, XR5, XR5 AWD | 2.3L L4, 4 Cyl 2.0 L DIESEL, 4 Cyl 2.3 L GAS
- Tracer | 1987-1989 | 1.6L L4
- Zephyr | 1980-1983 | 2.3L L4, 3.3L V6, 4.2L V8
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Mercury Control Module Part Number: DU2Z-12A297-A
$60.00 MSRP: $98.73
You Save: $38.73 (40%)
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Product Specifications
- Other Name: Module - Ignition; Ignition Control Module; Ignition Module; Computer; ECM
- Replaces: 5U2Z-12A297-A, 5U2Z-12A297-C, E43Z-12A297-A, DY-1076, DY-1074, E6SZ-12A297-A
Fits the following Mercury Models:
- Capri | 1983-1986 | 2.3L L4, 3.8L V6, 5.0L V8
- Colony Park | 1987-1991 | GS, LS | 8 Cyl 5.0 L GAS
- Cougar | 1984-1989 | 3.8L V6, 5.0L V8
- Grand Marquis | 1984-1991 | Base, Colony Park, GS, LS | 5.0L V8, 5.8L V8, 8 Cyl 5.0 L GAS, 8 Cyl 5.8 L GAS
- LN7 | 1983 | 1.6L L4
- Lynx | 1983-1986 | Base, GL, GS, L, LS, LTS, RS, XR3 | 1.6L L4, 1.9L L4, 2.0L L4, 4 Cyl 1.6 L GAS, 4 Cyl 1.9 L GAS, 4 Cyl 2.0 L DIESEL
- Marquis | 1984-1986 | Base, Brougham | 2.3L L4, 3.8L V6, 4 Cyl 2.3 L GAS, 4 Cyl 2.3 L LPG, 6 Cyl 3.8 L GAS
- Sable | 1988-1990, 1986 | GS, LS | 3.0L V6, 3.8L V6, 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L GAS
- Topaz | 1984-1991 | Base, GS, GS AWD, LS, LS AWD, LTS, LTS AWD, Sport, Sport AWD, XR5, XR5 AWD | 2.3L L4, 4 Cyl 2.0 L DIESEL, 4 Cyl 2.3 L GAS
- Tracer | 1987-1989 | 1.6L L4
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Mercury ECM Part Number: 9L8Z-12A650-ABB
$601.29 MSRP: $890.80
You Save: $289.51 (33%)
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Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM)
- Manufacturer Note: 9M71A30521 (VXB1)
- Replaces: 9L8Z-12A650-EL, 9L8Z-12A650-ABA, 9L8Z-12A650-EK
Fits the following Mercury Models:
- Mariner | 2009 | Base, Ford Hybrid, Limited, Mercury Convenience, Mercury Hybrid, Mercury Luxury, Mercury Premier, Premier, XLS, XLT | 3.0L V6, 6 Cyl 3.0 L GAS
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Mercury PCM Part Number: 8G1Z-12A650-LHRM
$570.11 MSRP: $841.50
You Save: $271.39 (33%)
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Product Specifications
- Other Name: Reman Module - Engine Control - EEC; Engine Control Module (ECM); Engine Control Module; ECM
- Replaces: 8G1Z-12A650-LE, 8G1Z-12A650-LF, 8G1Z-12A650-JG, 8F9Z-12A650-CF, 8G1Z-12A650-LD, 8G1Z-12A650-JF, 8G1Z-12A650-JE, 8G1Z-12A650-LG, 8F9Z-12A650-CG, 8F9Z-12A650-CE, 8G1Z-12A650-JH, 8F9Z-12A650-CH, 8G1Z-12A650-LH
Fits the following Mercury Models:
- Sable | 2008-2009 | Base, Deluxe, Limited, Premier, SE, SEL | 3.5L V6, 6 Cyl 3.5 L GAS
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Mercury Control Module Part Number: 5U2Z-12A297-B
$101.22 MSRP: $166.55
You Save: $65.33 (40%)
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Product Specifications
- Other Name: Module - Ignition; Ignition Control Module; Ignition Module; ECM
- Replaces: E8DZ-12A297-A
Fits the following Mercury Models:
- Cougar | 1988-1991 | LS, XR-7 | 3.8L V6, 5.0L V8, 6 Cyl 3.8 L GAS
- Sable | 1988-1990 | GS, LS | 3.0L V6, 3.8L V6, 6 Cyl 3.8 L GAS
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Mercury ECM Part Number: 8U7Z-12A650-XARM
$445.40 MSRP: $698.33
You Save: $252.93 (37%)
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Product Specifications
- Other Name: Reman Module - Engine Control - EEC; Engine Control Module (ECM)
- Replaces: 8U7Z-12A650-XA, 8L8Z-12A650-AEB, 8L8Z-12A650-AYA
Fits the following Mercury Models:
- Mariner | 2008 | Base, Ford Hybrid, Limited, Mercury Convenience, Mercury Hybrid, Mercury Luxury, Mercury Premier, XLS, XLT | 2.3L L4, 4 Cyl 2.3 L GAS
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Mercury ECM Part Number: AL8Z-12A650-BKF
$615.04 MSRP: $911.17
You Save: $296.13 (33%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM)
- Replaces: AL8Z-12A650-BKD, AL8Z-12A650-BKE
Fits the following Mercury Models:
- Mariner | 2011 | Base, Ford Hybrid, Limited, Mercury Convenience, Mercury Hybrid, Mercury Luxury, Mercury Premier, XLS, XLT | 2.5L L4, 4 Cyl 2.5 L GAS
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Mercury ECM Part Number: 9L8Z-12A650-AFC
$616.28 MSRP: $913.00
You Save: $296.72 (33%)
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Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM)
- Manufacturer Note: 9M71A20A22 (JGF2)
- Replaces: 9L8Z-12A650-AFA, 9L8Z-12A650-BF, 9L8Z-12A650-AFB
Fits the following Mercury Models:
- Mariner | 2009 | Base, Ford Hybrid, Limited, Mercury Convenience, Mercury Hybrid, Mercury Luxury, Mercury Premier, Premier, XLS, XLT | 2.5L L4, 4 Cyl 2.5 L GAS
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Mercury ECM Part Number: AL8Z-12A650-BRF
$626.18 MSRP: $927.67
You Save: $301.49 (33%)
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Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM)
- Replaces: AL8Z-12A650-BRE, AL8Z-12A650-BRD
Fits the following Mercury Models:
- Mariner | 2011 | Base, Ford Hybrid, Limited, Mercury Convenience, Mercury Hybrid, Mercury Luxury, Mercury Premier, Premier, XLS, XLT | 3.0L V6, 6 Cyl 3.0 L FLEX
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Mercury PCM Part Number: AE5Z-12A650-EVE
$645.98 MSRP: $957.00
You Save: $311.02 (33%)
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Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM)
- Replaces: AE5Z-12A650-EVD, AE5Z-12A650-EVC
Fits the following Mercury Models:
- Milan | 2011 | Base, High Version - Car, Hybrid, Low Version - Car, Mid Version - Car, Premier, Sport | 3.0L V6, 6 Cyl 3.0 L FLEX
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Mercury PCM Part Number: 8E5Z-12A650-LBRM
$588.38 MSRP: $871.67
You Save: $283.29 (33%)
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Product Specifications
- Other Name: Reman Module - Engine Control - EEC; Engine Control Module (ECM); Engine Control Module; ECM
- Replaces: 8E5Z-12A650-JB, 8E5Z-12A650-LB
Fits the following Mercury Models:
- Milan | 2008-2009 | Base, High Version - Car, Hybrid, Low Version - Car, Mid Version - Car, Premier, Sport | 3.0L V6, 6 Cyl 3.0 L GAS
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Mercury ECM Part Number: AL8Z-12A650-ATC
$674.44 MSRP: $999.17
You Save: $324.73 (33%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM)
Fits the following Mercury Models:
- Mariner | 2011 | Base, Premier | 6 Cyl 3.0 L FLEX
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Mercury ECM Part Number: AL8Z-12A650-AFA
$674.44 MSRP: $999.17
You Save: $324.73 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM)
- Replaces: AL8Z-12A650-UB
Fits the following Mercury Models:
- Mariner | 2010 | Base, Ford Hybrid, Limited, Mercury Convenience, Mercury Hybrid, Mercury Luxury, Mercury Premier, Premier, XLS, XLT | 2.5L L4, 4 Cyl 2.5 L GAS
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Mercury ECM Part Number: AL8Z-12A650-ABC
$674.44 MSRP: $999.17
You Save: $324.73 (33%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM)
- Replaces: AL8Z-12A650-PC, AL8Z-12A650-ABA, AL8Z-12A650-ABB, AL8Z-12A650-PD
Fits the following Mercury Models:
- Mariner | 2010-2011 | Base, Ford Hybrid, Limited, Mercury Convenience, Mercury Hybrid, Mercury Luxury, Mercury Premier, Premier, XLS, XLT | 3.0L V6, 6 Cyl 3.0 L FLEX
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Mercury PCM Part Number: 8G1Z-12A650-HFRM
$572.60 MSRP: $848.30
You Save: $275.70 (33%)
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Product Specifications
- Other Name: Reman Module - Engine Control - EEC; Engine Control Module (ECM); Engine Control Module; ECM
- Replaces: 8G1Z-12A650-HF, 8U7Z-12A650-ANA, 8G1Z-12A650-HE, 8F9Z-12A650-BE, 8U7Z-12A650-AMA, 8U7Z-12A650-AMB, 8U7Z-12A650-ANB, 8F9Z-12A650-BF
Fits the following Mercury Models:
- Sable | 2008-2009 | Base, Deluxe, Limited, Premier, SE, SEL | 3.5L V6, 6 Cyl 3.5 L GAS
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Mercury ECM Part Number: 5U7Z-12A650-GKARM
$574.88 MSRP: $851.67
You Save: $276.79 (33%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Reman Module - Engine Control - EEC; Engine Control Module (ECM); Engine Control Module
- Replaces: 4U7Z-12A650-LJA, 4U7Z-12A650-HZB, 5L2Z-12A650-ABB, 4U7Z-12A650-HZC, 5U7Z-12A650-GKA, 5L2Z-12A650-ABA
Fits the following Mercury Models:
- Mountaineer | 2005 | Base, Convenience, Eddie Bauer, Elite, Limited, Luxury, Mercury Luxury, Mercury Premier, Mountaineer Version, Premier, XLS, XLT | 4.6L V8, 8 Cyl 4.6 L GAS
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Mercury PCM Part Number: 8E5Z-12A650-SARM
$617.36 MSRP: $914.60
You Save: $297.24 (33%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Reman Module - Engine Control - EEC; Engine Control Module (ECM); Engine Control Module; ECM
- Replaces: 8E5Z-12A650-KB, 8E5Z-12A650-MB, 8E5Z-12A650-NB, 8E5Z-12A650-TA, 8E5Z-12A650-SA, 8E5Z-12A650-RA
Fits the following Mercury Models:
- Milan | 2008-2009 | Base, High Version - Car, Hybrid, Low Version - Car, Mid Version - Car, Premier, Sport | 3.0L V6, 6 Cyl 3.0 L GAS
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Mercury PCM Part Number: 7U7Z-12A650-BBRM
$627.68 MSRP: $929.90
You Save: $302.22 (33%)
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Product Specifications
- Other Name: Reman Module - Engine Control - EEC; Engine Control Module (ECM); Engine Control Module; ECM
- Replaces: 6E5Z-12A650-AGE, 6E5Z-12A650-AGF, 7U7Z-12A650-DA, 6U7Z-12A650-BKB, 6U7Z-12A650-BJC, 6U7Z-12A650-BKC, 6U7Z-12A650-BJB, 7U7Z-12A650-BB, 7U7Z-12A650-BA, 7U7Z-12A650-DB
Fits the following Mercury Models:
- Milan | 2006-2007 | Base, Premier | 6 Cyl 3.0 L GAS
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Mercury ECM Part Number: 4U7Z-12A650-LFARM
$648.00 MSRP: $960.00
You Save: $312.00 (33%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Reman Module - Engine Control - EEC; Engine Control Module (ECM); Engine Control Module
- Replaces: 5U7Z-12A650-GHA, 4L2Z-12A650-UG, 4L2Z-12A650-UH, 4U7Z-12A650-JDD, 4U7Z-12A650-JDE, 4U7Z-12A650-LNA, 4U7Z-12A650-LHA, 4U7Z-12A650-LCA, 4U7Z-12A650-LFA, 4U7Z-12A650-LEA, 4U7Z-12A650-LDA, 4U7Z-12A650-LGA, 5U7Z-12A650-GGA, 5U7Z-12A650-BNA, 4U7Z-12A650-JGD, 5L2Z-12A650-AMB
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 ECM Part Number: 6L2Z-12A650-BPBRM
$633.79 MSRP: $926.50
You Save: $292.71 (32%)
Product Specifications
- Other Name: Reman Module - Engine Control - EEC; Engine Control Module (ECM); Engine Control Module
- Replaces: 6L2Z-12A650-AZD, 6L2Z-12A650-CAB, 6U7Z-12A650-KLD, 6U7Z-12A650-KLC, 6U7Z-12A650-KLA, 6L2Z-12A650-BPB, 6L2Z-12A650-CAA
Fits the following Mercury Models:
- Mountaineer | 2006-2008 | Base, Eddie Bauer, Elite, Limited, Luxury, Mercury Luxury, Mercury Premier, Mountaineer Version, Premier, XLS, XLT | 4.0L V6, 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS

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Mercury Engine Control Module

If you own Mercury and want to keep it in top shape, choosing OEM Engine Control Module 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 Engine Control Module 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 Engine Control Module coordinates combustion by use of split-second sensor data, maintaining power smooth and fuel lean. Mercury applied to be the middle ground between low and rich and it was selling on quick handling and spacious interiors. Drivers enjoyed the silent ride which was a result of the soft suspension and interiors that were well padded. Mercury was serious about that badge of messenger, as it stepped on the gas and threw on the steering wheel. Showrooms boasted of sound construction, definition, and prices that were below luxury and that were not cheap. Mercury continued to introduce comfort upgrades every decade, where families could travel long highways without any fatigue. The balance of ride feel and value is still commended by loyal owners up to now, even after production ceased in 2011. Engine Control Module is located in the center of the drivetrain and it monitors oxygen, throttle, and crank signals to adjust the fuel pulses and spark timing. In both sedans and wagons, the Engine Control Module allows the Mercury power to be spirited but also economical with gas. At sensor drift or season change, the Engine Control Module reinstates clean starts and steady idle. The solid state guts protect circuits against voltage fluctuations, and therefore, the Engine Control Module extends the life of the plugs and coils.

Mercury Engine Control Module Parts and Q&A

PCM
7W7Z-12A650-AEB
Q: How to remove and replace the Engine Control Module (ECM) on Mercury Grand Marquis?
A:
The replacement process of Powertrain Control Module (PCM) requires all customer keys for programming during installation since PCM replacement does not necessitate new keys. Follow the required procedure to obtain the module configuration through necessary module configuration retrieval steps. After releasing the clips you should disconnect the three PCM electrical connectors. Untighten and remove the bolt which holds the PCM in position before extracting the module. Install the PCM by placing it correctly then fasten it with the bolt and tighten it to 10 Nm (89 lb-in). Reinstall the three PCM electrical connector clips after reconnecting them all. You should complete module configuration retrieval steps to restore the module configuration. The completion of passive anti-theft system (PATS) reprogramming requires users to perform the Key Programming Using Two Programmed Keys procedure.
PCM, Black Oak
5L8Z-12A650-FK
Q: How to service the Engine Control Module on Mercury Mariner?
A:
The first step for Engine Control Module service calls for disconnecting the battery ground cable. Start by unfastening the powertrain control module (PCM) stud bolt nut before setting the wiring harness to the side. You should disconnect the three PCM electrical connectors followed by removing the two stud bolts which secure the PCM. Reinstallation requires installation of stud bolts to a torque of 9 Nm (80 lb-in). After removal of the PCM cowl seal follow the opposite removal steps while tightening the stud bolts to 9 Nm (80 lb-in).