Ok, so it's a toyota so odds are it's a denso or denso style alternator. I used to rebuild Alternators, you will need access to test certain parts like the regulator, or diode trio, or the windings to see where it's failing.
Personally I’d go with a Denso 27060‑50230. More expensive but it’s an OE part not third party. The one in your car was originally a Denso and it lasted almost 30 years, right?
If and when it does replace it with a denso and enjoy another 200k+ miles of no problems.
Look into a Denso remanufactured alternator. They are the Honda OE brand and are designed to work with Honda's dual-mode charging system. You can find them for under $300 at places like Rockauto or NAPA. I recently replaced mine on a '13 Honda CRV with no issues.
I recently purchased parts from NAPA. Got a Denso reman alternator, water pump, and belt tensioner.
Buy off rockauto and go with denso brand
Alternator is easy. OEM or Denso for sure. It’s a super easy job.
I did see something recently where an aftermarket alternator made by Valeo had the same part number as the Original Toyota part, but in fact had another software part number that made it through an error and not work properly.
No, don't get the denso remanufactured, because I got mine and it failed right out of the box.
The Denso branded remanufactured alternator arrived from Rock Auto with a broken plastic socket. I arranged a return and replacement, but the second unit also arrived with the exact same damage. I believe the issue is with Denso's factory packaging, as the alternator is placed socket-down without cushioning. I returned the second replacement for a refund.
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