It used to be free, completely open, no registration. Maybe we are talking about different things. This is (or used to be) a lookup of current and history calibration IDs and CVNs for a given VIN, not actual programming of modules. About a week ago it stopped working with a 'service unavailable' error message, it does not prompt for a login or redirect to a registration page.
When it worked:Service Unavailable - DNS failure
The server is temporarily unable to service your request. Please try again later.
Reference #11.566ccd17.1676749490.78929e6d
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