Models from 2015 to 2017 are frequently cited as the most reliable within the JK generation . By this time, Jeep had refined the 3.6L Pentastar V6 , which offers significantly more power and better fuel efficiency than the earlier 3.8L engine.
The 4.0L Inline-Six engine found in these years is legendary for its longevity, often described as a "bulletproof" tractor engine. The 2003–2006 models specifically benefited from improved suspension and engine refinements.
The 2012–2018 JK generation is widely considered the first "modern" Wrangler, introducing the four-door body style that now dominates the market.