1997 Infiniti Q45

Hello dragon8227

It is a process to access the knock sensor before removing it
Remove the intake manifold, remove radiator, remove radiator, intake housing, remove fan, remove all belts: power steering, alternator and if you have a/c, remove harmonic balancer, remove timing belt covers, remove timing belt remove intake housinng once you have remove all the above, you can see the location of the knock sensor is locate in the engine valley.