We do have DME counts, but this goes way beyond it:

http://www.autoweek.com/article/20080924/FREE/809189970

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"It's always running," said Ed Hibma, senior manager for technical support with Nissan North America.

Nissan says the VSDR isn't intended to spy on unsuspecting GT-R drivers but is needed to help mechanics and engineers monitor the performance of various onboard systems in the highly advanced car.

It's that part about "warranty repairs" that has Weires worried. He says data collected by the VSDR could allow Nissan arbitrarily to invalidate all or part of the car's warranty. For instance, Nissan specifically warns owners that they could void warranty protection by running a car with its vehicle dynamic control (VDC), governing traction and stability, turned off. (In fairness to Nissan, the owner's manual does allow owners to defeat VDC when wheelspin is needed to rock a car that's stuck in snow or mud.)