Couple of parts questions

[robkay]

Originally Posted by CTScott

Actually if one of the two mounting tabs is broken off, you don't need to replace the entire headlight. The parts that the drawing above is detailing are the replacements for the broken tabs. There are two holes near each tab, where the replacement tabs get screwed to. Toyota must have expected the tabs to be a weak point.

I had to replace the tabs on the lens on the driver's side of my 2007 hatchback. The part#'s are:
Top tab: 81194-52080 Bottom/left tab: 81196-52050
They are labeled "Retainer, Headlamp"
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As a cobble, if you are in a jam and need to try to fix them ASAP without the above parts, Loctite makes a cyanoacrylate adhesive that will work on polypropylene. It used to be called Plastix, but now they call it Loctite Plastics Bonding System (the "system" is just a tube of cyanoacrylate adhesive and a priming product).

Note that adhesives that will stick to polypropylene are very, very, very few. Superglue without the supplied primer WILL NOT WORK. Don't waste your time. And don't waste your money on a "I think I'll try this" product before carefully reading the fine print. Many adhesives that are indicated for plastic repair state: "Not for use on polypropylene or polyethylene...." That means it will not work. Don't even bother.

I would not trust simply gluing the tabs back on. After gluing the tabs on, further strengthen the repair using the "superglue and baking soda trick." If you are not familiar with this just search it on Youtube. Build up a few layers on both sides of the seam. This will strength the repair a lot. Be sure to use the primer everywhere you are putting glue on the plastic!
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There are some other alternatives for reattaching the tabs if you have certain shop equipment. Search youtube. There are a couple different ways that guys do it.