Actually factory one has about 10 or so IIRC. You turn the knob to the position you want and that's where it opens.
OEM one can have a six year warranty along with the rest of the car, parts are always available and service is always available.no one give the warranty on original one past 3 years any way... after market one had 2 years warranty
I'm sure you could but how can you install it as well as a factory install with the rolled edge and without affecting the strength of the roof?I agree that u might be taking some chances with after market ones but im sure if you do your research you can find someone to make a good quality one...
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