Is my MX5 OBDII?

[Sirois]

Hi everyone,

I have a 2003 NB.

I have found the OBDII port in the fuse area under the steering wheel.
However the car also has that grey diagnostics port in the engine bay.

I was expecting only one or the other, so just wondering if having an OBDII port means the car is OBDII?

[ManiacLachy]

Yes, it's OBDII, but the diagnostic box is still play as well. I'm not sure if they cover the same things, or if there's a split of systems.

I know I've used the diagnostic box to examine an ABS fault, but I have an aftermarket ECU so couldn't use OBDII and can't say if it would have given the same information or not.