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.
If you are going to get a new or remanufactured alternator spend the $$$ for a DENSO one.
As some others have said, make sure you only get the remanufactured Denso alternator. No other alternator seems to work.
I replaced the alternator on my 2012 Odyssey the day before yesterday. Rebuilt Denso (I saw several suggestions online to -not- stray from Denso for this vehicle). was\\~$250 at Napa, after I got my core deposit back.
Get a factory Denso if you can but if not the O'Reillys alternator are good quality, we install a few a month and haven't had a comeback.
My alternator just went on my 2008 FJ TT, and I ended up getting a Denso alternator, which works great, but I o nm ly bought it because it was the only one in town.
Get a DENSO brand remanufactured alternator. Parts store house brands are shit.
I recommend DB electrical for a stock, everyday use replacement. I have one going for about 4 years now, and I abuse it heaving as it's on a truck with a plow motor. Want the best in the business? Get a Denso alternator, they will last forever.
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.
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