Alternator Denso or OEM Mazda

If the alternator is OEM, replace it, because is close to the exhaust manifold, it will fail sooner than later.

If you are replacing the alternator, strongly recommend using only Honda dealer sold remanufactured alternators (probably Denso) or an aftermarket Denso brand remanufactured alternator. Lots of problems reported with other brands.

If you’re gonna go through the effort of replacing the alternator, do NOT get cheap shit. Get a new/remanufactured Denso alternator.

Denso alternator is my go to choice for that vehicle.

For my personal vehicles, I replace alternators at 100K with Remy or Denso new alternators and have never had an issue and I save a lot of money by waiting a couple of days.

Nippondenso (Denso) is what I would choose, I believe this is the OEM manufacturer.

I would get Denso

Had the same issue with a reman denso alternator that went in a Honda, it was the cheap diode/rectifier pack that was fitted that was causing the bat light to stay on.

you can go on rockauto.com and should be able to purchase an OEM Denso Alternator.

I replaced my original alternator (which is also denso out of the factory) with a brand new denso alternator. Should be the exact same thing as the factory alt. It's not working at all. Battery is not staying charged. Had a complete diagnostic done by Honda and they said it is the alt. Kinda disappointed I waisted $700.