That looks like a Delco 50DN alternator from a transit bus. They are oil cooled and they are real workhorses. They produce a very high output at the engine idle speed which is what we need to keep up the electrical load of the A/C units on our buses. Watch out for oil leaks that is the only real problem you have with them. They will outlast everything else on the market in my opinon.
Generally, it's best to go with new OEM (Honda) parts. My second choice is aftermarket, new or rebuilt parts. That said, in all my years at wrenching I've had great luck with aftermarket from reputable (NAPA, Duralast, etc) stores with good warranties.
I bought a rebuilt Delco Remmy from Rock Auto for all things, a Mazda Protege. No issues in the last few years of driving.
Mitsubishi made a heap of OEM parts for other brands. Including alternators for Mazda lol. Also various electronic modules too.
I ended up getting a new Bosch AL49X from Bavarian Autosport (back in the day). IIRC, I needed to purchase a new pulley and fan since the old ones were Valeo and incompatible with Bosch. I sort of remember also needing a different / non-standard belt length.
Replace the alternator. The battery light indicates the battery is not being charged (due to bad alternator), losing power steering is also a sign of bad alternator as it provides the power for it to function. O'Reilly battery test also confirms this as battery should read 13-14V if it's being charged by the alternator. Recommend going with OEM alternator or name branded aftermarket like Denso which is the OEM supplier for reliability reasons. This should fix most of your issues.
Most of my experience is from the Infiniti side of the family, but I replaced an alternator on all my higher mileage vehicles. In general, the diode packs in Nissan alternators go out after about 150k miles or so.
My light was due to alternator-08 odyssey- alternator also was starting to wine pretty bad as well. Local mechanic fixed mine for just over $500 I also had the oil leak happening prior to alternator going bad.
My car 2012 honda pilot died while I was driving down the highway yesterday. The stereo cut power on and off, then I lost power to the vehicle and I pulled off the road. I got the vehicle towed to a garage assuming the alternator crapped out (120k miles on my SUV).
even a simple job like changing the alternator is difficult due to where they place it. There's not a ton of space to work on the car in the engine bay.
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