I dont know what they are on this engine.
I was under the car giving it my inspection- ramdom....
and so I popped the hood and you can clearly see the Spark plug coils in the rear-
But It looks like space on top of that is limited due to the top portion of the firewall.
I didnt remove the plastic engine cover- but I said to myself... 60K before I have to think of this again.
You could probably even go longer than the 60k miles. I know that's what the manual says, but unless you are having a problem, I would prolong until 100k at least. I just replaced the spark plugs on my truck at 190,000 miles, with no visible signs of wear, and with no engine running change, or fuel mileage change after I replced them. I did replace with OEM direct replacements though, so they were costly, but I figure if they lasted another 190k miles, then I won't ever have to worry about them again.
Also, you can get to the back spark plugs rather easy on a transverse mounted engine by removing one side of the top motor mount. This will allow you to rock the engine forward, and have more access to the rear spark plugs. An old W body trick.