Free repair checklist
Change Your Challenger's Spark Plugs Yourself
The rear bank spark plugs on the 2016 Challenger are notoriously awkward — but once you know the u-joint trick, the whole job takes under 2 hours. This free guide covers the correct NGK Iridium IX plugs, 13 ft-lb torque spec, and every step to get it right.
This checklist is a practical starting point. The DIY Mechanic System gives you a clearer path to diagnose the problem, plan the job, and complete the repair.
What this checklist covers
- Rear bank access trick using a u-joint extension — the move that makes this job actually doable
- NGK Iridium IX plugs with the exact 13 ft-lb torque spec so you don't strip aluminum threads
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