[Neonentity]

Mine broke in my 03 EX at 60K miles after the local GM/Kia dealer replaced the engine due to the butterfly valve assembly dropping bits into the engine.
It was a gold bolt.
I had cautioned the service writer about the different bolt types to no avail.
Mr. Goodwrench spun it in with a chattergun and it came apart 400 miles from home on our Summer vacation. Kia Roadside towed it away.
Picture us, the kids, all our gear and our trailer dumped alongside the road as we waited for rescue. 100F in the shade, 140F inside my skull.

Kia towed it to the local yokels -NEVER trust a GM dealer with a Kia sideline- who "fixed" it. I came to pick it up, explained that the splash pan belonged under the car instead of in the back seat, and drove it another 50 miles before it failed again.
The mechanic had not installed the spacer.

Kia towed it 75 miles this time to a real Kia dealer in Spokane, Washington. They did a correct job and the car drove normally back home.

A few weeks later, I heard a hard hammering from under the hood. It was a familiar sound, the same I had heard when the butterflies were loose in my intake. I videod it and sent the movie file to the service manager at the local dealer, who ignored it.

It happened again and once again, Kia towed it in. The dealer replaced the purge valve, which is located on the opposite side of the engine from where the noise originated. They also replaced the pulley bolt AGAIN, because they could stiff Kia for the recall.

Now the Sorento has a rough idle and I am waiting for the sound to reappear.

I took Pistnbroke's advice and disabled the BV assembly by disconnecting the control valve. So far, no idiot light and no loss of driveability. Time will tell!