An observation:

the previous owners of both my Lexus’s replaced the oem windshield with aftermarkets.

been noticing the hot dash area in the LS as it’s a black dash. Even though the windshield says “solar tint” it gets physically hot and radiates heat down and towards the passengers.

The passage of the infrared and various UV rays heats the dashboard a lot. Smells like hot plastic.

The air conditioner was built and enginereeed for the oem gold internal tinted design like the side windows. Major reduction in heat gain and dash heating.

Over long enough I think it will damage the dash and the extra heat may dry out the leather parts themselves and accelerate the vinyl door panels stickiness and wear.

i am wondering if the dash issues reported here are with oem or replacement glass.

front glass and dash are noticeable physically hotter than the side windows at similar sun angle exposures.

thought about ceramic tint but my thoughts were that the glass will still be hot.

If the infrared and UV rejection is built into the glass the glass itself should stay cooler as should the dash.

Constantly kicking up the ac fan from the hot air from the windshield/dash area combo.

i am going to replace both windshields with oem parts for this issue.

i would not recommend aftermarket glass on either a LS or SC.

car was made for the oem heat and UV rejection built into the glass it seems.

Both cars are “keepers” and both the LS and SC seemed to have air conditioning adjustment issues...

ahhh. Incorrect glass. Car not designed for aftermarket glass. Messes up the ac....