spontaneous wheel stud sheering?

[Chrisleduc1]

What are the odds to having 2 wheel studs snap? Spontaneously?

I went to drive my wife '18 odyssey and noticed a lug nut in the cup holder, but it was snapped off. My driveway is uphill, and off camber. It was the front driver, the downhill side of the driveway. My wife said, "some ladies were walking by a few days ago and they called out from the street (downhill about 25 feet in distance) 'is this yours?'" They handed her the lug nut and my wife thought it was a random bolt from when I moved a trailer the other day.

So short story long, as I look at this front wheel, there are two studs that are snapped off, side by side. The one nut was recovered from down in the street a few days ago, but not the other.

I do swap sets of tires, and did a swap about 6-9 months ago. However I do use a torque wrench and make sure I have it right..

I guess one could have snapped while driving and then the other while going in and out of the driveway..? I am having a hard time seeing how this could happen without someone having come during the night and done this.

Thoughts?

 

[MUDZLLA]

Probably both studs were torqued well beyond yield at some point by someone else - in which case you should consider changing all studs on the vehicle or... they were a defective batch from the OEM. The look of the break often gives clues. Any inclusions? Signs of necking or stretching? Brittle fracture, etc. Look on line for information on bolt failures and you may see your bolt there.

Good luck!