I had the radiator replaced yesterday and noticed this dangling today when I checked the coolant level.

Looks like an 02 sensor wire but I can't find the plug-in for it anywhere it'll reach

 

Can anyone take a peek under their hood??

 

I looked in my 01 SE and didn't see any plug resembling that one. I'll look in more depth when I'm in there tomorrow. Is it coming off of anything or just joining in to a bigger wire harness?

 

I just walked out to my 2002 SE and did.not see anything similar to that of your picture... IMO even took a picture in case you want to see. Do 5th gens have hydraulic motor mounts? That seems to be the only thing I can think of that's near there

 

I checked my I35 and didn't see one.

What year is your Max, and where does the other end of it go to?

 

my guess is it's for a block heater... check the block near the manifold for an element in one of the freeze plug locations.

 

The car is an 03 SE. Thanks for checking guys, the car does have a block heater so that's a good lead. I'll check