Roof molding coming off during car wash

There's a pair of little metal tabs on both ends that get bent out of position, so you need to adjust them so they don't slip and cause lifting in the middle. As for glue, I've used a tiny bit of 5 minute epoxy on the tabs but have never tried to glue the strip down in the middle.

 

Yeah, maybe PriusC is different than regular Prius... Main thing is get 'em real clean and ensure the fastener is working correctly and then use a tiny bit of epoxy. Not as big of a deal in the rear, it's when they come loose up front that you lose them on the freeway.

 

What functions does it play anyway?

 

This is 3M Plastic and Emblem Adhesive, 08061 made especially for the purpose..

 

It's a decorative strip... Mostly needed to hide the welds that connects the various roof parts together... It helps to reduce cost of production.

Tesla has become famous for the world's largest metal presses that can take a giant slab of sheet metal and create nearly the entire car body in one massive thump of tens of thousands of pounds of pressure. This requires massive upfront cost, but in the long run is way cheaper than having a bunch of robots weld together a car body from separate pieces.