Originally Posted by majorhavok
Your post was way too civilized. I had some good smacktalk ready, but I guess that was a waste. lol
Fair enough, my thought is still that ABS is a cheap/low temp thermoplastic. I doubt the energy efficient windows are going away, if anything they will likely become more common. The more people who have this problem and report it will likely cause the manufacturers to start spec'ing out different polymers with better thermal characteristics. Some of the glass filled nylons would make a great grill/mirror material... just more expensive.
I think I'd pay a few more bucks for parts that don't melt if I don't park in my garage or parking structure.
Speculation in the other thread makes perfect sense, especially seeing photos of the reflection pattern these windows makes.
They are made at higher elevations and assembled without capillary tubes that allow pressure between the panels to equalize.
When they are brought down to lower elevations, the glass pulls in, effectively forming a very efficient parabolic reflector.
The sun does not have to reach 212 on it's own... the bowing of the glass concentrates it and it goes much higher.
Toyota's ABS parts are ABS. ABS has specific qualities, which include it's embrittlement temperature, and it's melting temperature. ABS is ABS... it's not a matter of Toyota using "cheap" ABS.
The fault is with the design of the windows not having capillary tubes.
You are right. Low-E windows are not going anywhere and are going to be more and more common. This issue needs to be addressed at the Federal level in the specifications for low-E windows before it starts a major brush fire.