Interesting call on tire 👍🏼. Makes total sense . I just bought a 2017 M3w. 2000 miles great tread on rear tire. Should I be concerned? Due to tire age alone ? Replace it ? Thanks. U seem to be up on stuff.
Tyres (tires) should be replaces at about 5 years old regardless of tread so you should be OK for this season but I'd change them next year.
Definitely put some sort of puncture sealant in the existing rear unless you as certain it's already been done. I use Puncturesafe but I'm sure there are similar products available in the USA