What is this plastic cover name/part number that sits in front of the battery? I have coolant spraying out from that cover because one of the two plastic fasteners is loose.

 

This is on a 2008 TL

 

coolant is not leaking out because your missing a fastner. That part is simply a cover for the air intake components that are located beneath it.
I lost one of those fastners as well, no issues on my end

 

Thanks, I recently had my radiator replaced and there are still spots where fluid was spraying everywhere. I'll have to wipe down the engine bay because I suspect there is still a leak somewhere.

 

1. stop using green coolant
2. like mentioned above, it's basically just an air diverter for the air intake tube that comes up, no coolant comes from it.
3. Check your coolant overflow tank, tubes for a leak.
4. check your radiator cap