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Significant Range Loss on my 2018 Model 3 Long Range - Is this normal battery degradation?

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Laura J. · rep 0 · May 22, 5:28 AM · 1 replies · solved · Question

Vehicle: 2018 Tesla Model 3 Long Range

Hey everyone,

I've noticed a pretty significant drop in my available range on my 2018 Tesla Model 3 Long Range. When I first got it, I was seeing around 310 miles fully charged, but now it's consistently showing closer to 260-270 miles. This is after about 6 years and 80,000 miles.

I try to keep my charging habits good, mostly charging to 80-90% and rarely letting it drop below 20%. Is this level of degradation typical for a Model 3 of this age and mileage? I'm worried there might be something more serious going on with the battery pack.

Has anyone else experienced similar issues with their 2018-2019 Model 3? Any tips or diagnostics I can run myself before booking a service appointment?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:28 AM

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ClearTheCode admin answer:

Battery degradation is a normal part of EV ownership, but significant drops can be concerning. Here's what you should know:

  1. Understand Normal Degradation: Tesla batteries are designed for longevity, but some capacity loss over time and mileage is expected. For a 2018 Model 3 with 80,000 miles, a 10-15% degradation (which aligns with your 310 to 260-270 mile observation) is generally considered within the normal range, especially for early models. Factors like extreme temperatures, frequent DC fast charging, and consistent charging to 100% can accelerate this.

  2. Check Battery Health via Service Menu (Advanced Users): While not officially supported for end-users, some advanced owners access a hidden service menu to view more detailed battery health metrics. Proceed with caution as incorrect actions can affect your vehicle.

  3. Software Updates: Ensure your vehicle's software is up to date. Tesla frequently releases updates that can optimize battery management and range calculations.

  4. Recalibrate BMS: Occasionally, the Battery Management System (BMS) can miscalculate the true state of charge. A common method to recalibrate is to drive the car until the battery is very low (below 10%), then charge it to 100% and let it sit for a few hours. Repeat this cycle a couple of times. This can sometimes 'reset' the BMS's understanding of the battery's full capacity.

  5. When to See a Shop:

    • If the range drop is sudden and severe (e.g., more than 20% in a short period).
    • If you experience unexpected power limitations or error messages related to the battery.
    • If recalibration attempts don't improve the situation.
    • Your vehicle is still under the 8-year/120,000-mile battery warranty (whichever comes first) for Model 3 Long Range, which guarantees a minimum of 70% battery capacity retention. If your degradation falls below this threshold, Tesla service can diagnose and potentially replace the battery pack under warranty.
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