NHTSA complaint #11545755

Owner complaint summary

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.