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