That mechanic must be using some really cheap alternators, we use denso alternators where I work and rarely have issues.
Don\u2019t get any of those aftermarket ones. I\u2019m not sure what aftermarket brand it was that my mechanic got but months later the steering wheel would intermittently lock up while driving. It was not easy to diagnose as the voltage would read fine. Ended up getting a Denso one, paid a lot because needed it urgently. Been fine ever since.
Yes, get a Denso reman from RockAuto for less than $200 after core.
Get the Suzuki Grant Vitara V6 105a by Denso. Bolts on and looks just like factory. Goes from lame 70a on the early t4r's to a 105a with this upgrade. Runs my stereo and accessories like it's nothing.
I went with a Denso reman and it’s been holding up fine for 12k miles.
If it is an original Denso, the best unit to use is the one that you have. It likely can be serviced with new brushes, rectifier, whatever. Do NOT use an original Denso as core for a cheap reman. A puppy dies every time someone does that. Those remans just do not last.
The alternator is $700, with today\u2019s pricing that\u2019s totally fair. Just checked with local parts suppliers, for a 2.5L Mazda 6, for a quality Denso unit, it\u2019s fucking $350 before markup, and the cheaper options are still over $200! You have to remove the intake for this job which requires new gaskets as well, so for $700 you\u2019re getting a good deal.
Get the Denso from Rockauto, or NAPA should carry them local to you. It's a total PITA to get to, I don't care what kind of warranty autozone provides because it's not paying for my time.
Just make sure to buy either new OEM, used OEM, or a good rebuild like Denso. Parts store ones have a bad record of either being bad directly out of the box, or crapping out in short order.
My worst breakdown? A 2003 Toyota Tundra I had died on the highway from a bad alternator and I was able to pull over to the shoulder.
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