Yes, the upper plenm needs to come off to change all the sparkplugs,
and use only the factory spark plugs! Do not use any aftermarket plugs or wires on this vehicle
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Has the OBD2 diagnostics been employed?Some of these type of machines will need the intake plenum removed to access the coil safely(expect to buy a intake plenum gasket and sealer.)
2 bolts in each of the seats' floor rails... total of 8. Wire harness connectors may not be the same power seat control harness, seat heaters, etc. Research of connectors shows floor harness connectors are identical between 04 & 05. However, optional features like seat warmers in the wire harness of the 05 model may not exist in the other and vise versa.
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