You will need to have it programmed by a shop or dealer with ob2d programming software (Launch X431 we recommend). Your VIN# must be added to it along with linking your car key immobilizer or it will not work! This would be the case on any ECM you buy, used or new.  The immobilizer and VIN# have to be added to the ECM or car will run for seconds and turn off. Honda and Acura ECM (Engine control Module), transmission shift control modules, Valve Body, Safety items, and ABS braking systems require i-HDS and J2534 software to program – this can not be done with just a scan tool.  We do not accept returns on these modules or systems installed and not properly programmed.

You do not need new keys etc - this is not true.