Had the same issue a few months back. Put in a new alternator and it’s been perfect since.
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.
You need to try using a OEM REMAN or OEM NEW alternator. Aftermarket items can really affect BSD.
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
Purchase a new or remanufactured Denso or TYC alternator. Most others are a roll of the dice in terms of lasting longer than 12months.
My 540i at 141k started eating me alive, Alternator blew up
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