Bimmercode is easier for coding tail lights. Foxwell is okay for reading codes. ISTA is better for diagnosing why your transfer case actuator failed or running a full vehicle test after a water leak. Part 7: Troubleshooting common "Bad Download" issues You downloaded something you thought was "better," but ISTA opens to a blank VIN field. Here is the fix.
The "better" download is not the newest one (which is often buggy), nor the smallest one (which lacks data). The "better" download is the bmw rheingold ista better download
Happy Driving and Diagnosing.