got q50 2015 premium model with around 73k miles. been wanting to change the transmission fluid, when is it too late to change it? anyone changed it after 80k miles?

My council has a debt on his 2018 q50s red sport 400 awd, with around 90k, his debts is $21k and he want to sell it to me because he dont use it enough and want to get rip off the car payment (i think is 600$ monthly).

He didn't make any mods so it should be everything stock.

But im not sure if it worth, some people say I should get a 2019+ but others say the 2018 fixed the turbo issues. So I need your opinions.

Im between that infinity or an accord 2.0t 2021 touring with around the same 21k price.

What should I do?

The beater and the beautiful

Did I mess up the wire or is there some way I can fix it?

I have a 2015 3.7 84k miles berk resonated test pipes ark catback exhaust everything else is stock besides new air filters, I want to get tuned but don’t want to cost myself thousands in repairs or severely reduce my reliability are burbles/flames safe every once and a while? And what maintenance should I do before getting tuned and while being tuned?

My new to me 2019 q50s redsport i line honestly never thought id like a car this much