spark plugs are good for 100k, if you change them now your just wasting good money, this is a COP engine, coil on plug, it requires you to remove all 8 coils to replace the plugs, see the 7mm bolts at each cyl, remove them then remove the spark plug, make sure you blow out each spark tube to remove sand and debris that will fall into tube after removing coil, but again, not untill 100k, and then make sure you also replace the spark boots, as they will not last to the next spark plug change interval, injector or fuel rail removal is not required