= Tech Spec Addendums =

Every option control and modification for our ECUs has an addendum for the technical specification, which
we will send upon request.  If your ECU contains a modification or option, please  
[[OpenECU Support Contact|contact OpenECU support]] to request the addendum.

If you are not sure if your ECU contains a modification or option, most likely it does not.  You must
specifically ask for the mod/option and pay extra for it.  However, here is a guide to help you determine
if you have an option or modification.

Your ECU has an option or modification if any of the following are true:
 * Your ECU is something other than an M110, M220, M250, M460, M461, or M670
    * For example, if you have an M210
 * You paid extra for a modification
 * Your ECU part number (on the label) contains "modX", where X is a number.
    * This is for older ECUs.  Recently the part numbering scheme changed - see the next bullet point.
 * The last two digits after the 2nd dash are not 01 OR the last three digits after the 3rd dash are not 000
    * Example, your part number is 01T-068276-0102-001.
        * The "-0102" shows that you have mod 02 (the last two digits after the 2nd dash show mod level).
        * The "-001" shows you have option 001 (the last three digits after the 3rd dash show option).