LS - 4th Gen (2007-2017) Discussion topics related to the current flagship models LS460, LS460L and LS600H

LS suddenly died

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Old 09-08-23, 03:17 PM
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Striker223
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Originally Posted by LeX2K
Parts store alternators to be blunt are trash they either don't work out of the box or fail shortly.
My record is 4 in a row DOA, thankfully it was on a car where the alt is easy to get to
Old 09-08-23, 03:19 PM
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LeX2K
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Originally Posted by Striker223
My record is 4 in a row DOA, thankfully it was on a car where the alt is easy to get to
lol 4 straight that's impressive.
Old 09-08-23, 04:42 PM
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Frustrating. Sounds like a different message? As suggested previously, time for diagnostics.
Old 09-08-23, 05:45 PM
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NewG
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Originally Posted by LeX2K
Parts store alternators to be blunt are trash they either don't work out of the box or fail shortly.
yea that was my thought. To the Lexus dealer I go 😒
Old 09-08-23, 06:50 PM
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Because you are going to the dealer, OEM MSRP alternator $620, discount internet price $455. Just an FYI.

Last edited by swfla; 09-08-23 at 07:42 PM.
Old 09-08-23, 07:16 PM
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LeX2K
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Denso 210-1203 Rockauto probably has the best price
Old 09-08-23, 07:44 PM
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Good suggestion if the dealer diagnosis is alternator only. Rock requires a core returned to them for their rebuilt alternator.
Old 09-08-23, 07:47 PM
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Striker223
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Originally Posted by LeX2K
lol 4 straight that's impressive.
Originally Posted by LeX2K
Denso 210-1203 Rockauto probably has the best price
Yeah I was a little enraged that I did the job 4 times for free.....I will say though if you ever need the alternator replaced on a GM 3.6 V6 I can replace it insanely fast lol!

Rockauto Denso branded alternators have never let me down, I like them and use them on my own cars where applicable.
Old 09-08-23, 07:57 PM
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NewG
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Took a look, connection a-top the alternator was loose/moveable. Tightened it down, fingers crossed, letting her run for a minute. I haven’t gotten any messages this far
Old 09-08-23, 08:29 PM
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Got a voltmeter or multimeter? Measure voltage across the battery and see if it climbs or drops. Easy, simple charging system diag.
Careful with those loose feed and ground wires! Can go south real quick if not tightened and torqued! Awful lot of ecus, just sayin'.
Old 09-08-23, 09:35 PM
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Originally Posted by NewG
Took a look, connection a-top the alternator was loose/moveable. Tightened it down, fingers crossed, letting her run for a minute. I haven’t gotten any messages this far
I wouldn't rush to any conclusions yet. You did it before and an issue showed up. I salute you for trying but you can see that it's not an easy fix. Anyway, good luck and the dealer is still an option.
Old 09-19-23, 04:09 PM
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NewG
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Originally Posted by swfla
I wouldn't rush to any conclusions yet. You did it before and an issue showed up. I salute you for trying but you can see that it's not an easy fix. Anyway, good luck and the dealer is still an option.

You’re right, it’s definitely not an easy fix. Turns out the previous alternator was bad, as it failed the test. Popped a new one in, tested everything, all was well. Lasted for about a week, and now I’m getting random messages, “check brake/SRS/Parking Brake system”
loss of power steering, lights brighten with RPM increase. But no check generator message or even a battery light. I know I’ll be told to go get a voltage check so I’ll do that before jumping to conclusions. This alternator was installed by a mechanic friend of mine who cleaned the terminals and grounds.

This is a headache 🤕
Old 09-19-23, 04:38 PM
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Originally Posted by NewG
You’re right, it’s definitely not an easy fix. Turns out the previous alternator was bad, as it failed the test. Popped a new one in, tested everything, all was well. Lasted for about a week, and now I’m getting random messages, “check brake/SRS/Parking Brake system”
loss of power steering, lights brighten with RPM increase. But no check generator message or even a battery light. I know I’ll be told to go get a voltage check so I’ll do that before jumping to conclusions. This alternator was installed by a mechanic friend of mine who cleaned the terminals and grounds.

This is a headache 🤕
Voltage regulator is dead if the lights follow RPM, buy a denso or Lexus unit
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Old 09-19-23, 04:43 PM
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What brand of alternator did you use? As mentioned by others, generic brands from auto stores can be a crap shoot. There's a lot of good knowledge on this forum.
Old 09-19-23, 04:52 PM
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Originally Posted by Striker223
Voltage regulator is dead if the lights follow RPM, buy a denso or Lexus unit
I figured that would be the ultimate thing to do. 3rd times the charm?


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