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At 1 month old my 06 GX developed a crack for no apparent reason while sitting in the garage. Service Manager took his pen and ran along the crack and said it has a rough spot so it must be a rock and not a warrenty item. I believe anytime you have a stresscrack like that, it's NOT going to leave a smooth line with absolutely no roughness. Dealer: $1000. Major aftermarket windshield (with black dots): $350. I don't believe the windshields have anytype of "moisture sensor", but the ability of that "little black box" up there to sense any impact viabration. With you finger, tap the outside glass over the "black box" and the wipers are activated. Tap the plastic "black box" housing inside the vehicle, and behold: the wipers come on too!! It's a miracle!!! That's my revelation for the day.

I installed a Thule Evolution 1600 on my 2006 in December and drove from Seattle to Phoenix and back during the holidays. This model has the following: 1. Comes in silver top and black base or all black. 2. 16 sq. ft. capacity. 3. Length goes from front edge of spoiler to back edge of moonroof -- no interference with either. 4. 34 inches wide and you can open it from either side -- accessable from either side when standing on running boards, or stand on the back when barn door is open. You don't need a ladder. 5. Noticeable wind noise but still very, very quiet. 6. Traveled in heavy, heavy rain and heavy, heavy snow and no moisture came inside. 7. Easy to install -- 1 man can do it alone. 8. It looks very nice -- as though it was made for the GX470. Check website: www.thule.com for your local source or online specials. I got mine from REI -- in stock. Installation advise: At the point where the U-bolts clamp to your roof rack, wrap it with a 2 inch heavy tape. This will prevent any metal to metal sliding. I understand the new models are going to have a rubberized pinch-clamp instead of the U-bolts. Hope that helps. Reply if you have any questions.