Alright. A month ago I was driving my VW hit 100K miles. I put it in sport mode and immediately my car starts rocking back and forth.

Drove it to the dealer it was close by. They said they could get me in next month.. Nope.

I call around everyone’s booked. I found a small shop. This guy knocked out the spark plug in cylinder 5 and the ignition coil (which was the problem), not the spark plug. The car wouldn’t go above 40 mph. It’s been running fine.

I drove 3 hours a couple weeks ago to a different state no issues. I’m about to do it again and wondering if I should just change out the other 4 plugs?

I watched some YouTube videos. It doesn’t seem that difficult.

I just need to know, is there anything that could potentially go wrong for someone who has never done it? What are the cons?

Or is it incredibly easy and there’s no cons or no ways I could screw up?

I figure changing 4 plugs would cost me somewhere between $300-$400 range. I spent like $250 just for one with the ignition coil so.. potentially more.

The plugs are not that expensive. Would be much cheaper to do myself.