Alternator life expectancy ??

Alternators can last 30 years like the one in my 65 Galaxie or they can croak in a couple years. You never know and don't need to worry. I have been driving since 1975 and have replaced maybe 2.

 

Same for me noticed a whine for a few days from the engine bay. Did some testing that weekend confirmed it was the alternator, ordered and replaced the next weekend.

 

Toyota OE alternators are very long lasting if they have not been abused. If you do have to replace it, NAPA or maybe a good local rebuilder only. Do not buy from Autozone/Advance/Oreillys, etc. Word to the wise, straight junk there.

 

How is this Denso rebuilt unit holding up so far? Any issues?

 

I drive a 2002 Tacoma with 268,000 miles. No problem with my alternator or anything but the LR door latch and hood cable. I bought it new 22 years ago!

 

Original lasted to 196K.

 

I got 231,000 miles out of my Tundra with no alternator issue. The Tundra before that had 125,000 when I traded it, again no alternator issue.