458 What does “ one service coupon remaining in nqs “ mean ?

The NQS is your instrument cluster. It keeps track of all of the services that have been performed on your car (provided that the technician updated the NQS when the service was done).

Ferrari in their infinite wisdom only provided the NQS with a limited number of spaces for services that can be stored. It varies from car to car, the 612 only had spaces for 6 services, your car maybe has 8 service spaces. I can't remember, but you can look at the NQS parameters on a Ferrari diagnostic computer and see what mileage and date each service was done.

After all of the services spots in the NQS are full, (depending on the car) the service reminder system stops working. On a 612 you just get dashed lines when you look on the dash as to when the next service is to be done.

I can only guess that Ferrari thinks that your car is now obsolete and it is time to purchase a new one.

Brian Brown
San Francisco Performance