To reset the 2015 Infiniti Q50 maintenance data, please follow these instructions:

1.Turn the ignition on without starting the engine (press START/STOP) button.
2. Using the lower center console display press the MENU button.
3. From the MENU screen select SETTINGS.
4. From the SETTINGS screen select METER.
5. From the METER screen select Maintenance. Select the Maintenance item (i.e. Oil and Filter) to reset or change service intervals.
6. Turn the ignition off and then start the engine to verify the indicator has been reset.

You can also see a detailed blog post: https://oilreset.com/2014-infiniti-q50-maintenance-light-reset-specs/