| Specification | Detail |
|---------------|--------|
| Release | ISTA / Rheingold 4.39.20 |
| Build Date | Mid-March – Early April 2026 |
| SDP (Diagnostic Data) | v4.39.20 (or matching integrated level) |
| Programming Database | Typically matches standalone PSdZData 4.39.20 |
| Languages | English, German, French, Spanish, Italian, Chinese, etc. |
| Main Focus | Bug fixes, EV support, ISTA Next integration, repair instructions |
Note: ISTA 4.39.x continues the transition from legacy ISTA/D and ISTA/P into the unified “ISTA Next” interface. Bmw Ista- 4.39.20
Cause: Windows power management shutting down the Ethernet adapter. Fix: Go to Device Manager → Network Adapters → Realtek USB GbE → Properties → Power Management → Uncheck "Allow computer to turn off this device." This is placebo in older builds, but 4.39.20 actually respects this setting. Note: ISTA 4
This specific build focuses on stability, expanded vehicle coverage, and bug fixes rather than a radical overhaul. Here is what is new in 4.39.20: Cause: Windows power management shutting down the Ethernet
Even in a mature software like ISTA, new bugs appear. Based on user reports from build 4.39.20: