REPAIR SERVICE 05-10 MUSTANG 4.0L ECU ECM PCM ENGINE MODULE COMPUTER P0443 P0403 Featured Products If this is the case

If this is the case

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This ECU will interchange or replace the following ECU part numbers:

Fan speed switch positions 1through 4 have been tested and confirmed good

There may be some chipped plastic near the connector but the lock tabs are in place

REPAIR SERVICE 05-10 MUSTANG 4.0L ECU ECM PCM ENGINE MODULE COMPUTER P0443 P0403 Featured Products If this is the caseRepair & Return Process The Repair and return process is pretty simple and helps you avoid paying the high cost of a new ECU through your dealer. Step 1: Click on the buy it now button, select your return shipping preference and complete checkout. (Please make sure to read the Tech Notes below prior to purchase, thanks!) Step 2: Package your ECU carefully so that it does not incur structural damage during shipment. Take it to the Post Office, FedEx,