With an automatic transmission, selecting Sport mode makes driving more enjoyable, but this mode resets with each start and must be manually selected. I created a small harness that can counteract this behavior. The car will always start with Sport mode enabled if it was enabled before the car was shut down. and I can reset it manually using the switch.
Electronics is very simple, implemented on the smallest Microchip microprocessor. This is a plug-and-play device that is easy to install.
Updated 7/22/2025
Gadgets for my MX-5 Miata (ND) 
For the 124 Spider?
LikeLike
I tested it on MX-5 2024, but I think it will be same for all models, including Fiat
LikeLike
I’ll put myself on the list when it surfaces in the store, and let you know.
LikeLike
Thanks for coming up this. Watching the store for itBack. To the mountains.
LikeLike
Any idea as to when this will be available?
LikeLike
It is available now, but to power it, one wire needs to be tapped to the nearby cable, using Posi-Tap. I’m waiting for new harnesses to make it completely plug-and-play.
It is expected to be available by the end of August 2025.
LikeLike
Are you still planning on a release before the end the month?
LikeLike
Next month, I have to travel until end of this month
LikeLike
Would it be possible to make the same thing for the middle button linked below which disables the speed alert bong? It would sell very well!
https://forum.miata.net/vb/attachment.php?attachmentid=430882&d=1755619810
LikeLike
Any updates?
LikeLike
yes, all done. Will be listed in store next week $50
LikeLike
Looks like you need to make more of them – they were gone before I even had a chance to order!
LikeLike
sales are not started yet; I just made place holder for ordering. It will be released next week
LikeLike