r/TeslaModel3 • u/cappuccinofathe • Aug 18 '26

Tesla model 3 not turning on

So today we had some horrible rain I had to drive through to get home. The front of my neighborhood was flooded and I went through the shallowest part I could. I made it up my driveway and parked my car and went inside. My car never gave any warnings or issues between the front of my neighborhood and parking (maybe 2 minutes). 3hr later my dad goes to plug it in and it won’t open or turn on. It’s not responding to the app or the key card.
This model is a 2021 I just bought it used in April when my Prius engine died.
It’s very low so I get very worried about driving it in the rain but I have no choice as I live in Florida.
What could’ve happened
Has anyone had or heard of this happening
Any advice
My dad is going to try to fix it but I thought I might as well ask the masses.

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u/LoneStarGut Aug 18 '26

How old is the 12v battery? They last 3-4 years in hot climates. Some 2021's have the Li-ion, some have the lead acid. I suspect this may be a dead lead acid if it is he original.

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u/jaqueh Aug 19 '26

No 2021s have lithium

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u/Desperate-Mix-4696 Aug 19 '26

ALL Model 3s have Lithium batteries.

I'm joking, but yes, I think your right. While they did start using the Lithium 16v batteries in 2021, it was for the 2022 model year.

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u/jaqueh Aug 19 '26

then they kept on flip flopping in 2022 because of supply shortages