Alternator Bosch or Denso

I replaced my alternator two years ago, and I put in a Bosch, and I haven't looked back. It works great and also has a warranty.

Replacement is absolutely fine as an option, but I recommend going with a genuine brand as originally specced for the vehicle (Denso, AC Delco etc). Some aftermarket brands like Jaylec (just an example of brand, not quality) aren't built to the same standard and can be underpowered.

Best has been new Bosch or Delco-Romy from jobber stores. Never had one of those fail yet.

Denso, nippon, aisin are the only brands you should be looking at for an acura.

I think I put a Bosch 145 on my 01 5.3 and it’s been a non issue

DIY Guy here, I always use Denso parts for my Hondas when it comes to electrical stuff. Denso is the OEM parts supplier for Honda's alternators. I just replaced an alternator in my sister's 2011 Acura RDX with a remanufactured Denso unit and she's had no problems with it at all.

That mechanic must be using some really cheap alternators, we use denso alternators where I work and rarely have issues.

I order a Bosch AL113MX Reman Alternator (yep Bosch reman the Motorola) since that was what was currently in there. The 81 has a big square York compressor mounted right on top of the alternator which means that to get the rear alternator bolt you better have the right extensions and you are going to do it blind. So after at lot of effort I got the old alternator out and the new one in and only then did I notice that the pulley did not line up.

my local garage replaced with an aftermarket. Two weeks ago the squeak of bad bearings arrived and *it* had to be replaced. A different mechanic (Honda specialist) said OEM parts were very hard to find, even here in Los Angeles, so they installed a better aftermarket alternator. That was a squeaker. Then they installed another: squeaker. Now I'm waiting for the delivery of a Denso alternator from Texas that's arriving on Friday. $100 more but I've got my fingers crossed.

FWIW I bought an oreilly\u2019s remanufactured for my e34 a few years ago. It failed and was replaced twice in two years until I just bought the Bosch from FCP. No issues since.