In this video I walk you through the replacement of spark plugs and an air filter (basically, a “tune up” in a modern vehicle) in a 2005 Jeep Liberty Sport with a 3.7 V6. If you’re careful and take your time, you should be able to conquer this task in just about an hour or so. The process is very similar to other Mopar vehicles with the 3.7 engine. Thanks for stopping by and Happy Wrenching!