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Tesla wants to replace my Model Y Standard Range battery pack with an LFP pack

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It's been a few weeks now since I got my car back. I have to say I'm quite pleased with the results. It doesn't appear to ride or handle any different than before. It's nice knowing that although I've got a three year old car it's got "a brand new engine with zero miles on it". And the best part is that I leave the house every day with 244 miles of usable range rather than the 189 or whatever it was I was getting at 80%.
Thats awesome man!

One last question.. how often did you use to Supercharge the original battery pack? Also did you charge daily to 80%? 90%? Just trying to figure out if there is anything I can do to help avoid this situation. Although if it does happen.. I certainly hope it does before I hit the 100K mile mark and lose the warranty on the battery. Im at 65K right now after 37 months of ownership.
 
Supercharger visits were extremely rare. Maybe 15 times total. At home I charged to 80% nearly all the time. I also charged at home with 110V 15A.
Wow that makes it even more scary. You essentially babied that battery for 3 years.. and it still failed!!

FWIW I use DC fast chargers about 4-10x per month.. charge to 90% most days.. and now at 65K miles with the exact same car with a 100% range estimate of 219 miles. That said Im paying attention for any of the charging errors you posted.

Thanks for sharing your entire experience from problem to resolution. Does make me sleep a little better knowing that if something does happen.. the LFP replacement is basically a better-than-new warranty replacement. Hope the car serves you well for the rest of your ownership period!
 
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Wow that makes it even more scary. You essentially babied that battery for 3 years.. and it still failed!!
I tend to think of whatever failed was a minor component, maybe some kind of sensor or whatever, not like a majority of the cells failed. The battery management failed, not the battery. And if this were to have happened after the 8 years / 100,000 mile warranty was used up then I'm optimistic some 3rd party might be able to repair it vs replace the whole pack.

Then again, I probably don't really understand what I'm talking about and just making things up.
 
Then again, I probably don't really understand what I'm talking about and just making things up.
Nah, you’ve got the basic read of it. It’s like 95% dumb luck. “Babying” the battery might yield you like 3% less degradation over 7-10 years, but it isn’t gonna do much of anything to protect against outright failure of the pack.

Supercharge early, supercharge often. Live on the edge, charge to 100% when you need or want to. Drink full fat milk.
 
Wow that makes it even more scary. You essentially babied that battery for 3 years.. and it still failed!!
Charging the battery to 80% with low enough usage to be able to use 120V 15A charging suggests that the battery spent most of its time in the higher degradation range above 55% for an NCA battery.

But that is not really a factor in "random" failures of a cell or few, or the BMS, or some other component.
 
Personally I would guess that the smaller 2170 SR packs are going to have a higher rate of cell-imbalance failures, just due to the fact that fewer cells are being asked to do more work. Sort of like the old 14 module Legacy S/X packs had much higher degradation than the 16 module packs in the same vehicle. Just a guess.

LFP is a different animal and should outlast all other pack types.
 
It's been a few weeks now since I got my car back. I have to say I'm quite pleased with the results. It doesn't appear to ride or handle any different than before. It's nice knowing that although I've got a three year old car it's got "a brand new engine with zero miles on it". And the best part is that I leave the house every day with 244 miles of usable range rather than the 189 or whatever it was I was getting at 80%.
How much slower does it feel off the line?
 
My son is in college, about 70 mile trip each way to visit him. Normally, even if I tried to charge as close to 100% as I could we'd still stop at a Supercharger before making the trip home. Yesterday we left the house with the full 244 miles on the guessometer. Didn't really feel the need to charge before heading home. Had 24% left.

Still a good upgrade.
 
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I drive a 2021 Tesla Model Y Standard Range that I bought almost exactly three years to the day from today - in March 2021, ordered in January 2021. In case you're not aware this was a very short lived version of the Model Y and was only offered for sale for about 6 weeks in early 2021. Nearly identical in every way to the LR model but with only rear wheel drive and 244 miles of range.

It's been at the service center for about two weeks with a battery issue. They called me yesterday and said that it's going to take a long time to get a replacement pack for my car (I presume there's not many of them around). Then they offered to replace my pack with a new LFP pack. Said they have most of the parts in stock and might be able to have it ready the next day. Asked me to come in and sign something to authorize that work.

Verbally they explained that the acceleration would be impacted by about .5 seconds on 0-60 and mentioned that they had to upgrade the suspension a bit to handle a little more weight. Also would get about 10 miles more range. I suggested that it would be just like the current RWD car with 260 miles and the advisor concurred.

I rushed over and signed it before they closed as I was excited to get my car back quickly.

Well today I get a message that they need another part and the ETA is about 1.5 weeks away. So I'll have to wait.

In the meantime I get to ponder if I'm really pleased with this deal or not.

Cons:

car will be heavier, slower, less efficient.. might go through tires sooner, might handle worse

Pros:

brand new battery pack, not refurbished
new pack better than my three year old pack which was not really delivering 244 miles on a full charge (not that I charged fully)
longer life span of battery since a) it's new and b) it's LFP

Since I've got time to wait and ponder, I wonder if I should accept this deal or push for something else (that might be better).

Any suggestions


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Hi timeshifter, I also have a 2021 standard range MY. Ordered in Jan 21, p/u mid Feb . Have been extremely happy with it.
Early issue with AC unit quickly resolved and the car has been issue free since. Looking forward to further posts about your
battery replacement and hope it all goes well. I think LFP is a good choice.
 
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My son is in college, about 70 mile trip each way to visit him. Normally, even if I tried to charge as close to 100% as I could we'd still stop at a Supercharger before making the trip home. Yesterday we left the house with the full 244 miles on the guessometer. Didn't really feel the need to charge before heading home. Had 24% left.

Still a good upgrade.
You mean the guessometer aka Energy graph or on the main screen top right of the speedometer (EPA rating) ?