Alternator OEM KIA or OEM Honda
In my experience, it’s most likely the alternator, I’ve replaced so many I’ve lost count.
My local mechanic put a new alternator in my older Accord late last year. It was around $550, including a new serpentine belt.
Honda OEM alternator
The alternator on my 2019 Forte failed.
I bought a used one with 20k miles on it, an new idler and tensioner pulley for around $350. Installed it all myself.
From my experience with replacing Honda alternators, I always go OEM.
You need one specifically made for your vehicle, but you can shop around on different sites, for different brands to find one that meets your budget. I prefer ones from the OEM (ie Honda), Bosch, or Denso.
Between the two that I've owned, I have way over 250k miles in 'em and they are awesome vehicles. Maintenance has been very reasonable although we just had to put a new alternator in the one we have now.
I would suggest the genuine Kia one, or a professional grade like NAPA's top line or an AC-Delco. I would avoid anything that says "USA Industries" or "Duralast" on it, based on personal experience. In our shop we have had nearly 100% failure rates with those brands.
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