How to Properly Maintain and Install the Engine Control Module on a Mercury Mariner?

To service the Engine Control Module, disconnect the battery ground cable, remove the PCM stud bolt nut, and set the wiring harness aside. Disconnect the three PCM connectors, remove the stud bolts and PCM, and reinstall, tightening bolts to 9 Nm (80 lb-in). Also, remove the PCM cowl seal.

How to remove and replace the Engine Control Module (PCM) for all on Mercury Mountaineer?

In order to change the Engine Control Module (PCM), the module configuration must be retrieved initially. To 4.6L (3V) engines, take off the air cleaner, disconnect the RH front wheel speed sensor and take off the PCM. Install the PCM, looseness of bolts and reconnect the components and the module configuration and PATS settings.

OEM Mercury Engine Control Module

Engine Control Computer

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213 Engine Control Modules found

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Mercury ECM Part Number: AL8Z-12A650-APB
$351.49 MSRP: $486.25
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Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); Module - Engine Control - Eec V; Engine Control Module
Fits the following Mercury Models:
- Mariner | 2011 | Base | 4 Cyl 2.5 L GAS
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Mercury ECM Part Number: 9E5Z-12A650-GB
$565.07 MSRP: $781.72
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Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); Module - Engine Control - Eec V; Engine Control Module
Fits the following Mercury Models:
- Milan | 2009 | Base, Premier | 4 Cyl 2.3 L GAS
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Mercury PCM Part Number: AE5Z-12A650-DAC
$580.95 MSRP: $803.69
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Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module; ECM; Module - Engine Control - Eec V
Fits the following Mercury Models:
- Milan | 2011 | Premier | 6 Cyl 3.0 L FLEX
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Mercury ECM Part Number: 8U7Z-12A650-ADARM
Product Specifications
- Other Name: Reman Module - Engine Control - EEC; Engine Control Module (ECM); Engine Control Module
- Replaces: 8L2Z-12A650-HB, 8L2Z-12A650-HD, 8L2Z-12A650-HE, 8L2Z-12A650-HC, 8U7Z-12A650-ADA
Fits the following Mercury Models:
- Mountaineer | 2008-2010 | Base, Premier | 6 Cyl 4.0 L GAS
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Mercury PCM Part Number: AE5Z-12A650-KHRM
Product Specifications
- Other Name: Reman Module - Engine Control - EEC; Engine Control Module (ECM); Engine Control Module; ECM
- Replaces: 9M6Z-12A650-EG, AE5Z-12A650-KG, 9M6Z-12A650-EE, AE5Z-12A650-KH, 9M6Z-12A650-ED, 9M6Z-12A650-EF
Fits the following Mercury Models:
- Mariner | 2009-2011 | Hybrid | 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV)
- Milan | 2010 | Hybrid | 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV)
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Mercury PCM Part Number: 7E5Z-12A650-SD
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); ECM; Module - Engine Control - Eec V; Engine Control Module
- Manufacturer Note: 7DE1F40B11 (ZSC3)
- Replaces: 7E5Z-12A650-SC
Fits the following Mercury Models:
- Milan | 2007-2009 | Base, Premier | 4 Cyl 2.3 L GAS
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Mercury ECM Part Number: 8E5Z-12A650-HB
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); Module - Engine Control - Eec V; Engine Control Module
- Manufacturer Note: 8E416D0505 (HHF1)
Fits the following Mercury Models:
- Milan | 2008 | Base, Premier | 4 Cyl 2.3 L GAS
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Mercury PCM Part Number: 8E5Z-12A650-UA
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); ECM; Module - Engine Control - Eec V; Engine Control Module
- Manufacturer Note: 8DE1F40B20 (UUU0)
- Replaces: 8E5Z-12A650-GB
Fits the following Mercury Models:
- Milan | 2008-2009 | Base, Premier | 4 Cyl 2.3 L GAS
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Mercury ECM Part Number: 9E5Z-12A650-FB
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); Module - Engine Control - Eec V; Engine Control Module
Fits the following Mercury Models:
- Milan | 2009 | Base, Premier | 4 Cyl 2.3 L GAS
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Mercury PCM Part Number: AE5Z-12A650-AFE
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); ECM; Module - Engine Control - Eec V; Engine Control Module
- Manufacturer Note: ADE1F40508 (FHU4)
Fits the following Mercury Models:
- Milan | 2010 | Base, Premier | 4 Cyl 2.5 L GAS
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Mercury PCM Part Number: AE5Z-12A650-AHB
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); ECM; Module - Engine Control - Eec V; Engine Control Module
- Manufacturer Note: ADE1HV0521 (HZU1)
- Replaces: AE5Z-12A650-AHA
Fits the following Mercury Models:
- Milan | 2010 | Hybrid | 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV)
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Mercury ECM Part Number: AE5Z-12A650-AJB
Product Specifications
- Other Name: Module - Engine Control; Engine Control Module; Module - Engine Control - Eec V
- Manufacturer Note: ADE1HV0531 (TJN1)
- Replaced by: AE5Z-12A650-CED
Fits the following Mercury Models:
- Milan | 2010 | Hybrid | 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV)
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Mercury PCM Part Number: AE5Z-12A650-CED
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); ECM; Module - Engine Control - Eec V; Engine Control Module
- Replaces: AE5Z-12A650-AJC, AE5Z-12A650-AJB, AU7Z-12A650-AAA
Fits the following Mercury Models:
- Milan | 2010-2011 | Hybrid | 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV)
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Mercury PCM Part Number: AE5Z-12A650-DBC
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module; ECM; Module - Engine Control - Eec V
Fits the following Mercury Models:
- Milan | 2011 | Premier | 6 Cyl 3.0 L FLEX
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Mercury PCM Part Number: AE5Z-12A650-DFC
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); ECM; Module - Engine Control - Eec V; Engine Control Module
Fits the following Mercury Models:
- Milan | 2011 | Base, Premier | 4 Cyl 2.5 L GAS
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Mercury PCM Part Number: AE5Z-12A650-DGC
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); ECM; Module - Engine Control - Eec V; Engine Control Module
Fits the following Mercury Models:
- Milan | 2011 | Base, Premier | 4 Cyl 2.5 L GAS
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Mercury PCM Part Number: AE5Z-12A650-DKB
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); ECM; Module - Engine Control - Eec V; Engine Control Module
Fits the following Mercury Models:
- Milan | 2011 | Base, Premier | 4 Cyl 2.5 L GAS
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Mercury PCM Part Number: AE5Z-12A650-EUE
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); ECM; Module - Engine Control - Eec V; Engine Control Module
- Replaces: AE5Z-12A650-EUD, AE5Z-12A650-EUC
Fits the following Mercury Models:
- Milan | 2011 | Premier | 6 Cyl 3.0 L FLEX
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Mercury PCM Part Number: AE5Z-12A650-GE
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); ECM; Module - Engine Control - Eec V; Engine Control Module
- Manufacturer Note: ADE1F40A08 (SRB4)
Fits the following Mercury Models:
- Milan | 2010 | Base, Premier | 4 Cyl 2.5 L GAS
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Mercury PCM Part Number: AE5Z-12A650-JE
Product Specifications
- Other Name: Module - Engine Control - EEC; Engine Control Module (ECM); ECM; Module - Engine Control - Eec V; Engine Control Module
- Manufacturer Note: ADE2F40508 (YJU4)
Fits the following Mercury Models:
- Milan | 2010 | Base, Premier | 4 Cyl 2.5 L GAS

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Mercury Engine Control Module Parts and Q&A

PCM, Black Oak
5L8Z-12A650-FK
Q: How to Properly Maintain and Install the Engine Control Module on a Mercury Mariner?
A: To service the Engine Control Module, disconnect the battery ground cable, remove the PCM stud bolt nut, and set the wiring harness aside. Disconnect the three PCM connectors, remove the stud bolts and PCM, and reinstall, tightening bolts to 9 Nm (80 lb-in). Also, remove the PCM cowl seal.
ECM
6L2Z-12A650-BPBRM
Q: How to remove and replace the Engine Control Module (PCM) for all on Mercury Mountaineer?
A: In order to change the Engine Control Module (PCM), the module configuration must be retrieved initially. To 4.6L (3V) engines, take off the air cleaner, disconnect the RH front wheel speed sensor and take off the PCM. Install the PCM, looseness of bolts and reconnect the components and the module configuration and PATS settings.