Engine Computer for 2004 Mercury Monterey

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There are 4 choices for the 2004 Mercury Monterey Engine Computer !!!
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Electronic Control Module (passenger side firewall) (4.2L) Federal emissions ID 4F2A-12A650-GF
Electronic Control Module (passenger side firewall) (4.2L) Federal emissions ID 4F2A-12A650-GG
Electronic Control Module (passenger side firewall) (4.2L) low emissions ID 4F2A-12A650-HF
Electronic Control Module (passenger side firewall) (4.2L) low emissions ID 4F2A-12A650-HG