I had 2 replaced under warranty. I'm pretty sure that it was the solenoids that went out. The 3rd went out just 1 or 2 thousand out of warranty and I had to foot the bill. The 4th went out at about 170K and I replaced it in my driveway after watching a youtube video. So, at 271,951 miles, I have 2 original injectors. Hope this post doesn't jinx me!`