Tesla removes battery health test for vehicles in update 25.26

With the recent Software Update 2025.26, Tesla quietly removed a feature that was popular among many drivers: the Battery Health Test. This diagnostic tool showed the condition of the high-voltage battery pack – and has now disappeared from numerous models.

Different Impacts Depending on Model and Year

The removal is not uniform but apparently depends on vehicle type, age, and test history:

Newer Models: For many 2025 Model 3 and some 2024 Model S, the option under Controls > Service > Battery Health has completely disappeared.
Older Vehicles: Some 2018 Model 3 can still view the results of previous tests but cannot start a new test – even if the required minimum waiting period of six months has passed.
Exceptions: Individual 2025 Model Y that have never conducted a test seem to still have the feature.
Cybertruck: Here, the test has been completely removed – including stored test results.

End of On-Demand Testing

Previously, owners could start the HV Battery Self-Test at any time via the Service Mode – without the 6-month restriction. Since Update 2025.26, this option has completely disappeared, even for vehicles that can still perform the test in the normal menu.

Whether the test will eventually only be available in the paid Service Mode Plus is currently unclear. Tesla has not commented on this so far.

Possible Reasons for the Removal

Tesla does not officially state a reason for the removal. Possible explanations include:

Tool Revision – preparation for a more precise or expanded diagnostic function.
Reliability of Results – there may have been discrepancies with certain battery or vehicle types.
Service Relief – too many workshop visits due to supposed issues that fall within normal battery degradation.

Outlook

Whether the battery health test will return in a revised form or disappear permanently remains to be seen. For Tesla owners, however, the update initially means less transparency about the condition of their battery.