robsjeep9

Nope some models never even came with one... I have an 09 JKU never had one

Delux2769

Nope. Ripped mine out almost 2 years ago. Many have also. I didn't notice a difference in hamd-to-hood heat, or engine sound. This way muddy water doesn't drip for 4 days after it rains or I go playing.

Nick09JK

Yeah mine is literally falling off because of the muddy water soaked in it from today's fun.

Shayes

I had an 08 JKU it didn't come with the insulation and my 12 JK doesn't have it either.

GreenJK07

It does have some use for insulation but not necessary. My 07 did not have one from the factory.

toxicity_27

It's more in case there was an engine fire. If the engine caught on fire the clips holding it in melt, and the blanket would smother it. I believe the Sports don't have it, as mine doesn't, but the Saharas and Rubicons do.

GreenJK07

Wow! Never knew the real purpose behind it other than insulation.

Xodius

This is more of an urban legend than anything. Several forums post that but, and I maybe wrong, I do not believe there is a single documented situation that supports the belief. On the L.O.S.T. Jeep forum one of the engineers from Jeep stated how it was added for noise dampening only. However that post was back around 2003 roughly.

It is also believed to help reduce engine heat or to let the engine warm up faster in cold climates. Whatever the reason most do not need it.

I have taken mine out of every vehicle I have owned, if it was there and on the majority it wasn't.

toxicity_27

I was told by a trainer from Chrysler that it was designed to stop engine fires. Makes it more interesting to me as to why they don't include it on all trim levels.

amick218

My 08 Sahara jku doesn't have it