I'm new to this forum.
Just a little intro, I bought my wife the EX 35 back in February 2015. Bought it at a used car dealer. Second day I noticed a transmission oil leak on the drive way, long story short dealer sold it as is and I had to repair it myself.
Infiniti wants about $900 for the radiator alone
I don't think so.
By the way it was leaking on the transmission cooler fitting at the radiator. Originally changed the o ring on it, worked for about 2 months and it's back to leaking. So I rather change the radiator than have the transmission go dry.
I did a video on the whole process, I saw a few threads talking about it so I decided to film as I did mine. I tried to look for a "how to " section to post it there but I don't see one or don't know about it. Feel free to ask away if you have any questions.