UPDATE: A user reported that the current production Gen4 ECU used in the new 2025-2026 Model 3&Ys p/n 1537264-10-E (black) is also compatible with the "bundle of wires with a board". 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 quali