Lucky for us, the Alternator was in fact faulty (it was a Bosch btw) and that the previous owner replaced it a few months prior, meaning it was still under warranty.
Bosch is a great aftermarket option.
Yes, if it was from an OEM supplier to Lexus or the auto industry, such as Denso (1/3 owned by Toyota/Lexus), AC Delco, or Bosch, but I would not buy a mystery brand, especially not a rebuilt, because I don't know how much they get rebuilt or tested.
Changed it for another OEM Bosch new (not reman). Subsequent test showed it was now good.
I got BOSCH AL113M from Adv auto (with a code cost me about 80), then went to tractor supply and got several large washers. I took the pulley off my old alt and put it on the new long-nose alt, stacking washers until it lined up.
So my just-installed today reman Bosch SR33X turns the light off with a very slight blip to 1200rpm.
I bought a Bosch rebuilt alternator from ECStuning and installed it last night. The light however has stayed on.
I wasn't crazy with the AC Delco (GM) alternator conversion when I used it on my MGB engine. The Bosch ones seemed to be a little better designed and easier to convert, plus they looked simmilar to the Lucas ones.
We have been having a lot of trouble with Bosch reman alternators and starters in the last couple years. Pretty sad, used to be great stuff. Now all the boxes say made in china and everything is crap.
I figured alternator, so took it to Autozone to scan and everything passed. Then took it to Meineke for them to check and they told me alternator was bad and replaced it. Well my interior lights were still flickering so I took it back and they say seems like the one they installed was defective, so they replace it again with an OEM Bosch and also print me a printout of a bulletin stating that under load lights may flicker and there is no solution.
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