Cleaning Out Corroded Weldnuts to Install a Trailer Hitch on a 2006 Toyota Sienna

Question:

I am attempting to install Hitch C13105 to a 2006 Toyota Sienna and I am not convinced the mounting bolts sent with the hitch are the correct size. They are not threading into the holes....looks like the bolts are too big. What size bolt is supposed to be used with a 2006 Toyota Sienna?

asked by: Jim H

Expert Reply:

What you are experiencing are weldnuts on the vehicle frame that are corroded and packed with road grime. This makes it seem like the bolts are too large. Really all you have to do is clean out the weldnuts. I have included a link to an FAQ article and a video that will help. A stiff wire brush, like # DW00254, will help.

This happens any time a vehicle has seen at least 1 winter. The bolt size for the weldnuts on your 2006 Toyota Sienna should be M12-1.25 x 40.

expert reply by: Michael H