Tesla has quietly removed the built-in battery health test in its 2025.26 software update, according to Not a Tesla App. The feature previously allowed owners to check their high-voltage battery's condition under Controls > Service > Battery Health.
1. Affected Vehicles
The removal impacts models differently:
Model |
Year |
Status |
|---|---|---|
Model 3 |
2025 |
❌ Fully removed |
Model S |
2024 |
❌ Fully removed |
Model 3 |
2018 |
⚠️ View-only (no new tests) |
Cybertruck |
All |
❌ All data deleted |
Notable exception: Some 2025 Model Ys retain full functionality if never tested before.
2. Service Mode Changes
HV Battery Self Test option removed from Service Mode
No mention in official release notes
May be moved to paid Service Mode Plus (unconfirmed)
3. Community Theories
Reddit discussions suggest:
Reduce service requests: Frequent tests caused unnecessary anxiety
Technical issues: Some reported battery faults post-test
Data transparency: Tesla's health metrics were stricter than competitors
Key facts:
Tesla's BMS (Battery Management System) remains industry-leading
Third-party tests like Aviloo show ~84% average health after 5 years
Other EVs may report inflated numbers by excluding buffer zones