Parts catalog did not show size, but you can remove a 10mm bolt from another area and see if it fits. Then take that to a hardware store and get some replacements. Should be a 10mm head and fine threads.

 

6 x 1.0 x 12mm bolt. Two of them. I recommend stainless due to location. Any hardware store. Literally, any hardware store.
Bolts are not sized by whatever wrench fits them. They are sized by the shank and the thread pitch.

 

For splash guards repair I like to use the bolts with fender washers.

 

typically, your mechanic will have left them off after doing a service

pisses me off when they do that, it saves them time, then when the customer doesn't notice so they throw them out, or if the customer does notice act all innocent, "oops, forgot!"

their purpose is to protect engine areas from salt spray, and provide some wind noise reduction in the cabin and some aerodynamic benefit, so most customers won't notice for a long time, and then won't realize their mechanic left them off on purpose

grumble

Oh, and above advice was spot on for the fasteners: The threads are M6-1mm. Their heads are either 10mm or 12mm (socket size), use stainless steel for longevity, and add a washer for load distribution.

 

As someone mentioned before, you can find the bolt at any hardware store.

 

BTW, had you gone to a junkyard, you would have gotten the part for a lot cheaper, AND the bolts would be there, too. And, if they broke off, just try another car, any car, they ALL use 6 x 1.0 bolts on SOMETHING. I like junkyards.

 

Thank you all for replies!
Got the bolts & washers at local Home Depot.