Various breather tubes and other odds-and-ends are attached to the air cleaner using cable ties. I think they will need to be cut in order to remove the cleaner. The ties are of the non-reusable variety with spacers to avoid chafing. It may be possible to displace the cleaner sufficiently to get at the coils/plugs without complete removal but I doubt it. The service manual is ambiguous on the type of plug fitted but it looks as though all models have platinum-tipped plugs, meaning that they only need replacing at 54,000 miles or 5 years and not 18,000 miles.