Have had no issues w my Mishimoto radiator and it's been on my car for 2 years.
Reviews of MISHIMOTO parts For Business
USA
Replaced it with mishimoto and haven't looked back. Holds much more coolant that OEM and does a much better job cooling.
Replaced OEM with a mishi, Fitment is good part reason I went with it was I replaced the fans with mishimoto fans and it all slid in nicely
I have a mishimoto radiator. At idle the highest I get to is 196 F then it drops down to about 185 F. While driving I’m usually averaging about 178 - 190 F if I’m not in stop and go traffic.
I have a mishimoto thermostat with their radiator setup. It does kick on the fans on at a lower temp range than when the stock one would which is good. I had issues running hot on the stock rad/thermostat and haven't had any issues since.
Mine bolted right in, no issues, and works spectacularly.
I put a Mishimoto rad in the R53 on the same terms as you @whalemingo - and only learned of Mishi's QC decline after I put it in the car. So far, it's been just fine.
I despise those mishi radiators they take up too much space. Makes it hard to do anything on the front of the engine without ripping it out.
Recently got rid of the mishimoto radiator and went back to the updated larger radiator
stay away from mishimoto, their radiator quality is sub par
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