Thank you. I did just happen to check the main coolant reservoir and that’s definitely what I’m smelling though it’s not a “sweet” smell as people often describe. It turns out my main reservoir is overfilled by a good inch or two above max and the cap threads are covered in white mineral...
I’m not a car guy so.... whenever I park my Supra (not a daily driver with only 4K miles on it) in the garage after driving it smells like new plastic?? (best way I can describe it). It’s not a bad smell per se just odd as my 2020 MDX has no odor at all. It’s definitely coming from the rear...