2005 MDX spark plug 4 engine failure
I know this is an old thread but this just happened to our 2005 MDX with 160,000 miles on it and I wanted to post this as a warning to others.
The MDX is my wife's daily driver, runs just fine. On the way back to our house from the park 3 miles away Tuesday Jan 6th, 2015. Yellow CEL and VTM4 lights come on, we weren't too worried as this happened back in Jan 2013 (drove car to dealer 17 miles away, they replaced #5 coil and all 6 spark plugs car ran fine). Got home, parked car. Then we set out to go to dinner, both lights came back on at startup. Stopped to gas up, again lights came on when we started the car backup. Drove approx 1 mile, got on highway, lights came on again and just as we passed the highway exit the car started making the awful tapping sound. Got off highway at next exit and limped car home. Parked car and arranged for the car to be towed to the dealer the next morning. They checked car out, spark plug 4 came loose, melted threads, spark plug and coil.
I'm going to start another thread that goes in to the details of our whole experience with getting the MDX back up and running.
But for us (and anyone else who is reading this) if those lights come back on again, I'm stopping the car and having it towed and checked out by a mechanic.
Hope this saves someone else from the painful experience we have had.