It most likely does and DO NOT buy a pre 2019 2.5 Turbo, regardless of model. The motors are flawed and leak coolant from behind the turbo and require a cylinder head replacement. if this repair has already been completed, you are good to go.

Aside from that, the only way to truly tell is to pop the hood and look under the engine cover, the cylinder de-activation components are all piled up along the rear (firewall side) of the motor on top of the valve cover. If there is pile of stuff, you got it. If you can clearly see the coil packs and valve cover, than it does *not* have cylinder de-activation.

side note, do not update the PCM past version D, it re-maps the ECU and completely neuters the car and is irreversible.

 

It sounds like the advice you gave above is intended for any owners who do their own PCM reflashing using MMP. What about Mazda service departments - is what you wrote common knowledge, or is it possible that this bad version actually might be done by dealerships? And why hasn't Mazda just put a hold on updating past version D, until they can correct the issues that you've seen?

 

I am a dealership tech and normally a PCM update is only done when/if there is a problem. We don't just go around checking the versions of modules for ****s and giggles. Module updates only pay .5 hour and the risk/reward/time ratio is not worth it.

Also, what the newest version does isn't a bug, it's a feature. It makes it more fuel efficient, with slight modifications the shift points, fuel trims, a few things.

a coworker updated his 2.5 turbo Mazda6 and hates it now lol womp womp.

 

Thanks, DisiFTW for that info. What are your thoughts on the original post?

 

It seems like post 19 models are not immune considering the oil consumption issues. I assume my '21 GTR is likely affected and will need the valve stem seals done at some point.