Replaced at 89K miles with NGK Iridium IX Spark Plugs and Bosch Coil Packs.
Remove front plenum 
Remove rear plenum 
Remove coil packs 
Access to spark plugs
Access to the spark plugs and coil packs on a Vectra V6 requires a minor strip down. This involves removing the plenums, vacuum hoses and a cable or two. This is not an how2 guide, more of a blog post record that this job has been done. There’s plenty of help online or drop me a message for help.
Part numbers:
NGK Iridium IX Spark Plugs – BKR5EIX
Bosch Coil Packs – 0221503026 (for cyl 1-3-5) and 0221503027 (for cyl 2-4-6)
Find Automotive parts and tools relating to this blog post by clicking the photo links below which include both Bosch Coil Packs, and six NGK Iridium Spark Plugs …
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