Buying a used Tesla is one of the smartest moves for Canadian drivers looking to go electric without the new-car price tag. But the battery is the most expensive component - and checking its health before you buy is essential.
Why Battery Health Matters
Tesla batteries degrade over time. A 2019 Model 3 with 80,000 km may still have 90%+ of its original range, but a poorly maintained pack could be at 85% or lower. Since battery replacement costs $15,000 - $25,000 CAD, this directly impacts the vehicle's true value.
How to Check Battery Degradation
- Charge to 100%:The displayed range at full charge vs. the original EPA range gives a rough degradation estimate.
- Use Scan My Tesla or TeslaFi:OBD-II tools like Scan My Tesla show the exact battery capacity in kWh vs. when it was new.
- Check the Energy Graph:Tesla's built-in energy consumption screen shows real-world range estimates based on recent driving.
- Review Supercharging History:Frequent DC fast charging can accelerate degradation - ask for the vehicle's charging history.
What's Normal Degradation?
Tesla batteries typically lose 5 - 10% of capacity in the first 50,000 km, then degradation slows significantly. For a 2020 Model 3 Standard Range Plus:
- Original range: ~423 km
- At 60,000 km: ~390 - 400 km (5 - 8% loss) - Normal
- At 60,000 km: ~360 km (15% loss) - Below average, negotiate price down
Tesla's Battery Warranty in Canada
All Tesla vehicles come with an 8-year battery warranty (varies by model between 160,000 - 240,000 km). This warranty covers defects and guarantees the battery will retain at least 70% of its original capacity. Check if the used Tesla you're considering still has warranty remaining.
Red Flags to Watch For
- Range significantly below expected for the mileage
- Frequent error messages related to battery or charging
- Slow Supercharging speeds (could indicate battery management issues)
- Vehicle was used as a ride-share or taxi (high-mileage, frequent fast charging)
Get It Inspected at Planet Motors
At Planet Motors, every pre-owned Tesla undergoes a rigorous 50-point battery health diagnostic before listing. We provide transparent degradation data so you know exactly what you're buying. Visit us in Richmond Hill or request a remote battery report for any Tesla in our inventory.
