Ignition Coil & Iridium Spark Plugs for Nissan Frontier (2005-2019) 4.0L V6Reliable Ignition Coil & Iridium Spark Plugs for 2005 2019 Nissan Frontier Direct Replacement Ignition Kit: This comprehensive set of six ignition coils and iridium spark plugs restores precise combustion timing and eliminates severe misfires in the 4. 0L V6 engine. The Stock VQ40DE Ignition Weakness Ignition coils on the VQ40DE inherently degrade from continuous thermal cycling and high ambient engine bay temperatures. The OEM coil boots tend to dry