UPDATE: It appears Tesla has released a new Gen4 ECU p/n 1537264-01-B to replace the 1537264-00-B. This is direct substitute and works with the "bundle of wires with a board". Also, there are other third party makers of "a bundle of wires" especially from China. We heard that those are of poorer quality and may not work. 2MuchSun is still selling the original bundle of wires with the same quality and 100% tested with a year waranty on workmanship. Our proven solution wo