mylehigh1

So Lexus's justification was that not having the Auto High Beams is no big deal, since the Bi-Xenon headlights aren't bright enough to bother anyone?
Maybe I'll just keep the high beams on all the time.

bclexus

That's not recommended - it could bring about confrontation you wouldn't want...

JDR76

Mine have been awful, in both my 2019 and my 2020. They stay on in high beam when I come to a four way intersection/traffic light, blinding cross traffic. They stay on in bright too late with oncoming traffic so I have to manually click them off. No hills or valleys. They’re similar in my Highlander, but work well in my Tundra. The feature is useless to me in my GS.

bclexus

@JDR76 - That's really strange. For the Lexus GS the Auto High-Beam feature is suppose to automatically activate the high-beams at 21 mph and revert back to regular headlights below ~17 mph. (See below image from owners manual).

If your high beams remain on when slowing to a stop for a four-way stop intersection/traffic light then something is badly wrong.

JDR76

Yup, on both my 19 and my 20. They don’t turn down when I come to a stop. Worthless feature for me.

EAST

Yea that almost sounds like it's not on. Mine also "dim" to low beam when coming to a stop sign then turn back on when when above 20ish MPH.

I use it most of the time. They take care of also dimming when approaching a car from behind (provided they have their taillights on). There has been a couple times when they'll actually flash cars that leave their high he's on (or it could have just been my imagination).

bclexus

Then both the 2019 and the 2020 need to visit a qualified technician in your Lexus dealership's service department because something ain't right with both of them, which is really, really strange that two GSs built a year apart have their Auto High-Beam features that don't work as they should.

EAST

Does it say "Auto" in your cluster in green when you have the Auto high beams on? I'm guessing yes, since you say it works in your tundra.
​​​​​​
A​​​​​t least for me, if I have it off then then turn it on, it'll give a message that it'll activate next time you engage the high beams, and a green Auto will appear in the top right whenever the headlight stalk is forward.

JDR76

Yes, this is exactly how mine work. I get the AUTO notification in the gauge cluster and they do go on and off with passing traffic. I just find them to be really slow to react, and often don't disengage when I come to a stop, particularly at a stop light.

bclexus

Something is bad wrong then...

JDR76

The car is due for service so I will ask them about it when I take it in.