I have a 2014 Model S 60kwh battery with 121k miles, getting close to battery warranty expiration. I have constantly seen a degrade which I fully expected, but now it is making it almost useless. The full charge is now at 157 miles RR. Which the car was rated for 205 at the beginning. A normal 90% is now 145 and dwindling, I recall a day when 90% was 180. Like I said I expect a 5-10% decrease, but this is becoming an issue. Last week I had mobile service to replace yet another door handle and mentioned this, they did a check and noticed an "isolation fault" and mentioned I should schedule a SC appointment asap. I did, only to get a mobile appointment for tomorrow. The issue is, the Mobile tech from last week called and said, he was mistaken and it was actually a "assertion" and this is normal, but I shouldn't bother to come in as the extensive battery check done remotely shows the battery shows normal degradation.
I also drained the battery to 10% remaining, then did a full 100% charge, but it said Charge complete but stopped at 90%. Something has to be wrong, and I wonder why Tesla wont share the report with me. I just am given thier word and expected to accept that.
My question is, is anyone going through this, what should i do. The car is only worth at this point $15k according to KBB and i read a replacement battery i s $18k, should I get out of this car? And whats to say another S/X wont do the same thing 5 years later? Sorry to be negative, just starting to panic.