Main EFI relay in the underhood fuse box of 1990-2005 Mazda Miata.
This is the relay that can fail and leave your car stranded, unable to start the engine. It will crank, but not fire up if this relay has gone bad.
Keep an extra in your glovebox at all times!

Quantity discount on multiples.
Fits 1990-2005 Miata.

Typical images.
You will receive either a B6S8 or B5B4 relay (depending on what is in stock)
Both relays work interchangeably on the 90-05 NA and NB Miatas.