Broke rear wiper arm stud sheared - how to fix?

[gatormark91]

I believe I ended up using the 30mm universal anodized dome shaped aluminum one from here, alloycarbon.com but I sanded it off and painted it. $15

I had a few to choose from, amazon and ebay. I can't remember but there was something funny on the underside behind the wiper, maybe it was concaved or convexed when I went to put it together. IT did not fit perfect on the back side, but it doens't leak, neoprene washers are in there also, maybe it was just hard to have one hand inside and another one holding the outside plug while you screw it in.
I suggest taking the wiper out and looking at the backside before, so you know exactly what your after.
home depot or lowes has nothing like that. The hole is too big, plastic won't hold water. I did look all over for an easier fix.

Thanks! Looks like 26.5 is actually a size Mercedes uses a bit, too, so there are a few options out there.

 

[TXLX100]

I just did this also. Recommend anyone removing wiper arm to spray nut and bolt with penetrating oil first. It's just a small 10mm bolt, I sheared mine with light force on a 1/4" ratchet.

Bad News:
Over-torqued the rear wiper arm not. Sheared the rear wiper bolt while re-indexing the rear wiper arm. Then even managed to scratch up the paint for good measure.

Good News(?)
The wiper technically works & is stuck on there pretty good. That's because I think the wiper motor's bezel teeth aren't mated properly to the arm's teeth.

Going forward I plan to just leave as-is & see what happens. I'll even use the damn thing.

Anyone else have a better idea?

This is why I can't have nice things!

 

[Pucker5]

I’m so effin salty, after pb blistering the nut I thought it thought it was coming off easy. It was the threaded shaft sheering off flush with the nut like op. Anyways, ordered a new link assembly today 90$ later and a new nut. Hopefully pulling the carpet panel off the inside gate doesn’t yield and nightmares. Anyone that’s replaced the wiper motor or link have and feedback on that process. Should probably not be lazy and dynamat the s*** of it while I’m in there