Check out this link, hopefully it answers your question. http://www.avengerforumz.com/threads/spark-plug-install.46223/
In the head.
If you don't know where the spark plugs reside, please do us a favor and have someone that knows where they are change them.
Looking for a Used Avenger in your area?
CarGurus has 312 nationwide Avenger listings starting at $2,495.
Search Dodge Avenger Questions
Dodge Avenger Experts
Related Models For Sale
Used Cars For Sale