How the Tesla 8-Year 70% Battery Warranty Actually Works
Use the free tool — BatteryCheck
What the 8-Year / 70% Warranty Means
Tesla backs its battery with an 8-year warranty tied to a 70% capacity-retention promise. In plain terms, Tesla says the battery should keep at least 70% of its original range for the first 8 years of ownership. Details such as exact mileage caps can vary by model and are set by Tesla, not by this guide.
How Degradation Is Usually Checked
The idea behind the warranty is simple: compare the rated range your car shows today to the rated range it had when new. If today's number falls below 70% of the original number within the 8-year window, that is the situation the warranty is meant to cover.
- Rated range now
- Rated range when new
- Current mileage
- Vehicle year and model
What's Normal vs. What Might Need a Service Case
Some drop in rated range over time is expected. The warranty exists because Tesla drew a line at 70% within 8 years, but this material does not say exactly where "normal" wear ends short of that line. If your own numbers point toward the 70% threshold, or you already have a service estimate in hand, that is when it makes sense to open a case with Tesla.
Opening a Service Case
This guide does not include Tesla's own submission steps or contact links. What it does work with is your own numbers. You can type in what the car itself shows, or paste a service estimate you already received, and see how your case lines up against the 8-year / 70% math before you call or file anything.
What's Unknown Here
- Exact mileage limits for the warranty (not stated in this material)
- How Tesla defines "rated range" versus other range displays
- Whether your specific model year has different terms
This is not a diagnosis, and this tool is not affiliated with Tesla. Confirm warranty terms and case status directly with Tesla.
What to Do Next
Type what your car shows — rated range now, rated range when new, mileage, year, and model — or paste a service estimate. BatteryCheck will run the degradation math from your own numbers and show how it lines up with the 8-year / 70% warranty, so you go into any conversation with Tesla with your numbers already worked out.