so my 2017 nx200t fsport has 38k miles and I am ready to change the plugs. I watched a couple youtube vids and it looks easy. I wonder if anyone has changed their plugs and saw anything that they questioned? plugs too dirty or clean? looked inside and saw too much carbon or none at all? issues taking out old plugs or putting in new?

anyone pay the dealer? how much? any interesting feedback from dealer or mechanic? I was going to buy one of those camera scopes to see what it looks like inside engine, but not going to cause not worried but I am still curious....

 

It's super basic DIY job with proper tools. Why pay anyone to do it? Or, at least, find a buddy with tools and hands.

 

My plugs looked fine at 40k Plug removal is straightforward, remove plastic cover on top, I used a long extension 10” to 12”, just make sure use electrical tape to secure Socket. Make sure you number the wires 1-4 (left to right) facing motor, disconnecting the coils helps. Luckily the plugs are now aftermarket @12.65 each (Rockauto) NGK 91961Original OEM l wouldn’t use anything else. I would also suggest getting a split beam torque wrench https://www.nationaltoolwarehouse.co...s-P256683.aspx. Dealer plugs are $32 each and figure at least one hour labor.