Mercury Cougar Engine Control Computer

Replacement Parts

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Powerful and sleek, your Mercury Cougar is an entry in an iconic line of vehicles. To keep it operating in peak form, it's important to stay on top of repairs like installing a replacement Mercury Cougar engine control module whenever they crop up.

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  • Part Number: 78-4584
  • Application: With Federal emission
    With 3 speed automatic transmission
  • Notes: O.E.M. #E73F-CA. Units are pre-programmed at the factory and ready for installation with no further programming required.
  • Part Number: 78-6136
  • Notes: With calibration #4-18A. Emission Calibration/Tear Tag On Front Door Jams, in Trunk, or Under Hood. Customer-specific parameters such as courtesy light timing, etc. May need to be reset after ECM is re-installed. Units are pre-programmed at the factory and ready for installation with no further programming required.
  • Part Number: 78-4771
  • Application: With automatic transmission
    With California emission
  • Notes: O.E.M. #E9SF-MB. Units are pre-programmed at the factory and ready for installation with no further programming required.
  • Part Number: 78-5196
  • Application: With Federal emission
  • Notes: O.E.M. #F2MF-RA. Units are pre-programmed at the factory and ready for installation with no further programming required.
  • Part Number: 78-4205
  • Notes: Units are pre-programmed at the factory and ready for installation with no further programming required.
  • Part Number: 78-4857
  • Application: With automatic transmission
    With Federal emission
  • Notes: Units are pre-programmed at the factory and ready for installation with no further programming required.
  • Part Number: 78-4767
  • Application: With automatic transmission
    With Federal emission
  • Notes: ID #E9SF-LA. Units are pre-programmed at the factory and ready for installation with no further programming required.
  • Part Number: 78-8409F
  • Notes: Flash programming included in price. With module #ML2-334. Customer-specific parameters such as courtesy light timing, etc may need to be reset after ECM is re-installed. Flash Units require programming specific to the vehicle prior to shipping. Accurate VIN and mileage are required. Delivered units are ready for installation With no further programming required.
  • Part Number: 78-4266
  • Application: With Federal emission
  • Notes: OEM #E6SF-VB, E6SF-VC, E7SF-GB. Units are pre-programmed at the factory and ready for installation with no further programming required.
  • Part Number: 78-5006
  • Application: With California emission
  • Notes: OEM #F1MF-BA, BC. Units are pre-programmed at the factory and ready for installation with no further programming required.
  • Part Number: 78-8549F
  • Notes: Flash programming included in price. With module #MLF-4K1. Customer-specific parameters such as courtesy light timing, etc. May need to be reset after ECM is re-installed. Flash units require programming specific to the vehicle prior to shipping. Accurate VIN and mileage are required. Additional vehicle specific on-car programming must be performed AFTER installation to prevent drivability and starting issues.
  • Part Number: 78-4761
  • Application: With California emission
  • Notes: O.E.M. #E9SF-HC. Units are pre-programmed at the factory and ready for installation with no further programming required.
  •  | Page 1 of 9 |  

Signs of a failing ECM include poor fuel economy or performance issues, but the most easily identifiable sign is a constant check engine light. When you need a new Cougar engine control computer, AutoZone gives you the choice between Free Shipping on $75 or more and Same Day Store Pickup (in most cases), so you always get the parts you need when you're ready to install them. Our Loan-a-Tool Program is also available to make sure that you always have that one last tool you need to finish the job.

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