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2018 Model 3 Long Range - Significant Battery Degradation?

0

Dan C. · rep 0 · May 22, 5:28 AM · 1 replies · solved · Question

Hey everyone, I've got a 2018 Tesla Model 3 Long Range with about 80,000 miles on it. Lately, I've noticed a pretty significant drop in my usable range. When it was new, I could easily get over 300 miles on a full charge, but now it feels like I'm struggling to hit 250, even with careful driving and charging habits.

I usually charge to 80-90% and rarely let it drop below 20%. I've tried recalibrating the battery by letting it drain low and charging to 100% a few times, but it hasn't seemed to make much of a difference.

Is this normal for a 2018 Model 3 with this mileage? What kind of degradation are others seeing? I'm wondering if there's something specific I should be looking into or if this is just the reality of an older EV battery.

✓ Accepted solution

ClearTheCode Admin

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

0

ClearTheCode guidance (Tesla · Buying & ownership)

Summary: For 2018 Model 3 Long Range - Significant Battery Degradation?, work through these steps on your 2016+ vehicle:

  1. Confirm the symptom — note when it happens (cold start, highway, after fuel fill, etc.).
  2. Scan codes — save all pending/stored DTCs; don't clear until you've recorded them.
  3. Check TSBs & recalls — look up your VIN for open campaigns and known fixes.
  4. Inspect the obvious — related fuses, connectors, fluid level, and recent repairs.
  5. Test the common fix — follow model-specific service procedures; one change at a time.
  6. Escalate if needed — burning smell, no brakes, overheating, or stalling in traffic → shop visit.

Owner reported: Hey everyone, I've got a 2018 Tesla Model 3 Long Range with about 80,000 miles on it. Lately, I've noticed a pretty significant drop in my usable range. When it was new, I could easily get over 300 miles on a full charge, but now it feels like I'm struggling to hit 250, even with careful driving and charging habits.

I usually charge to 80-90% and rarely let it drop below 20%. I've tried recalibra…

This is educational guidance, not a substitute for hands-on diagnosis.

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