NHTSA Complaint #11545755 — 2020 TESLA MODEL Y

Vehicle has 51,126 mi as of this writing. When new (June 2020) 250 miles of freeway range was typical in typical California weather for an efficiency rating of 280 Wh/mi for 100% to 1% state of charge (SoC). This was tested repeatedly, numerous times, on multiple road trips. At ~12K miles into ownership, OEM tires were swapped as they were dangerously useless in rain and snow. Repeated calculations confirmed ~10% range loss. This meant that average Wh/mi consumption went from about ~280 Wh/mi to about ~308 Wh/mi, for a real world freeway range reduction to about 227 from say 250 (again 100% to 1% SoC). This was expected and accepted. Last 2 years were spent in New England during which freeway range started to drop precipitously, reaching a low of 166 miles (100% to 1% state of charge; about 420 Wh/mi) at freezing temperatures; verified across two identical road trips. Cold weather range was expected, but in retrospect, this was far too much of a drop. Now back in California, range has dropped even further and settled at about ~150 miles -- or an abysmal 450 Wh/mi -- i.e., a 40% drop from the OEM tires, and a 34% drop from the new tires. All charging stats (and Tesla's remote tests) show the battery is at full capacity (69 kWh is a 1% to 100% recharge and the battery is rated at 70 kWh). Tesla claims no faults, and assign blame to driver (high freeway speeds; Sentry Mode; climate control; etc). Tesla now threatening -- as indicated in recent class action lawsuit -- to charge $275/hr if I continue to press the issue, even though I have explained rental Model Y vehicles have vastly better range. I have insisted on several options: (A) Pay for a loaner to test. - NO (B) I will rent another Model Y from Hertz and report back with data. - NO (C) Acknowledge the problem, I want to pay to fix it. - NO (D) Acknowledge the problem, but you don't know how to fix it. - NO It is clear I am now being strong-armed by their Diversion Team.