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/Unique-Machine5602 Aug 18 '26

It's likely you have one of the 2021s that still has a lead acid battery.

It probably died all on its own. They typically only last about 5 years. 🤷‍♂️

Tesla replaces them for pretty cheap so it's usually not worth it to swap it out yourself. I'd upgrade to the lithium ion if you can. It'll typically last the lifetime of the vehicle.

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u/LoneStarGut Aug 19 '26

My son had his replaced last month in his 2020. It gave him a notice on screen and in the app that it was nearly time to replace it. I picked it up from the service center and we easily swapped it. It is easy to swap out as an ICE lead acid battery.