yeah there's a bit to take off but nothing to hard. They are located under the intake so it has to come off. If you are going to tackle this job make sure you buy a new wiring harness from the dealer and replace this at the same time. And just my advice don't buy the new knock sensors from a local chain parts store get the dealer replacements. I believe my harness was $40ish and the sensors $80-$90ish a piece. Also pick up a new intake manifold gasket. you maybe able to reuse yours without issue but trust me you wont wanna take it back apart to fix a leaky intake.
this is where the 2 sensors are located.
mine where filled with water both time i replaced them
