> IIUC, Chrysler/Ford/GM/Toyota etc. don't give consumers any ability to mess with the electronics or software in these cars. I think they just don't want the

> IIUC, Chrysler/Ford/GM/Toyota etc. don't give consumers any ability to mess with the electronics or software in these cars. I think they just don't want the hassle, AFAIK they keep the ECU mostly a black box even to first-party mechanics as well (because in the U.S. if they show it to their first party mechanics, they are generally obligated to sell it to third parties at a reasonable price as well). Third party, and even open source, ECUs do work well though (emissions control being a bit more difficult to get right, mind you, and some of these projects are mostly abandoned by now); I don't think it's really that hard to swap it out, the sensors are mostly passive components.