Hey folks,
I gone through the last couple of pages to see if there was a solution to those who experienced differently than OP who had their battery replaced on their Model 3 P under warranty due to defect. It looks like there wasn't any other solid solution, so I'll go ahead and post the following.
I myself am experiencing loss of range with my Model 3 Performance. I'm currently at 266 miles at 90% SOC just yesterday after Supercharging from about 20% SOC with about 10K miles. I exclusively Supercharge since the begining of ownership. I've read and heard to recalibrate, do the voodoo discharge and recharge method that virtually everybody repeats to one another to try and do. That method hardly works for the most of us, me included, to see 310 miles at 100% or 279 miles at 90%. There was also a
campaign bulletin SB-18-16-010 Replace High Voltage (HV) Battery which stated that some batteries weren't wired properly, so the reported SOC/miles were inaccurate, but my local Service Center stated that my car built in July 2018 was not part of it.
Now, I found out that another fellow M3P got
a solid solution laid out here on Reddit. It basically requires a visit to a service center and for a Tesla technician to do a CAC reset and owner not let SOC dip below 20% SOC for calibration according to internal notes: Perform CAC reset as per article#
Toolbox
Note that there's no public access to that article. Hope this helps many of us to get to the bottom of the range loss over time that might not be battery degradation.