Just wondering if the federally mandated emissions warranty, which has a longer term than 4 years, covers any of the components under discussion here for the diesel.

After 500 miles of additional cross-country driving with no issues or warnings at all, the software version roll-back seems to be the right solution.

ard's observation is reason for concern in another year. IMHO, the dealer handled this whole issue well. Because we were traveling far away from home, and the error disabled the car, they invoked an extra "interrupted journey" aspect of the warranty coverage. But when it's gone...

The fed warranty is:
CATALYTIC CONVERTER
ENGINE CONTROL MODULE (INCLUDING ONBOARD DIAGNOSTIC SYSTEM)


Now the California warranty is FAR greater.

Interestingly, I wonder what BMW will consider as part of the "onboard diagnostic system"...)

I would have thought that if the diagnostic message is incorrect, whether due to a sensor error, a module, or software, then the warranty category of Control Module and Diagnostic System should cover it. Just IMO. I would certainly be making a case that it did, if it was mine.

Wow, those specs all look impressive...except that last thing.

http://whizzospace.com/misc/IMG_0054.JPG