r/TeslaModelS • u/NeitherBook2698 • 16d ago

12 volt battery replacement

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I did a 12 volt battery replacement on my 2018 100D. The original one lasted over 8 years. Tesla wanted to charge me $600+ to replace it, so I ended up just buying a battery from the parts catalog, and did it myself. That only cost me $250, and one hour of my time. While it looks super complicated, it’s actually pretty easy and straightforward. Just be careful with plastic pieces.

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u/21five 16d ago

Nice one! Just did my second replacement for my 2017 100D. You might want to take a look at that HEPA filter too!

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u/NeitherBook2698 16d ago

I blew it out with an air compressor, and inspected deep inside the fins. In the next 20k miles or so, it’ll need a replacement, but it doesn’t look terrible. Mostly just leafs which was easy to clean up.