My '10 Unlimited Sport doesn't have one oh well.

 

My 2009 Sahara has it and this is what Chrysler called it:
HGAS Hood Insulation

 

Some early 07's did come with it, as well as the underhood light and footwell light.
The 07 unlimited X I got for the wife with a build date of Oct.06, came with it all.

 

Well, there you go. It IS a fire suppressant.

When the engine catches fire, the pad gives off Hydrogen Gas.
When the hydrogen burns, it combines with oxygen, and rains down on the engine as water, thereby extinguishing the flames.

I'm glad we have that all figured out!

 

Hopefully I will never see that theory proven

 

I totally agree with you on this, the pad also falls down onto the engine and deprives it of air. Which helps put out the fire or let it continue to burn.

 

Hydrogen + Oxygen + 932 degrees F = Hindenburg

 

X = NO (optional YES)
Sahara = YES
Rubican = YES

 

I was under the impression that it was placed for sound purposes. I never give it much thought. I have an 07 and mine has it and it has a light too. JOE>

 

You are correct. It is called "Pad, Hood Silencer".