In order to use non-Tesla DC fast chargers from networks such as Electrify America, EVgo, or ChargePoint, your older Model 3 (before Oct 2020 with chrome trim) will still need to have CCS enabled regardless if the plug is NACS/J3400 or CCS1. Purchase a used Gen4 ECU p/n 1537264-00-B or 1537264-01-B from Tesla or on EPC (Tesla's parts catalog) for $140 plus tax. Users also have reported 1537264-10-E (smaller black one) will work with our bundle of wires, but may not mount to