Replaced it with mishimoto and haven't looked back. Holds much more coolant that OEM and does a much better job cooling.
just replaced rad and all soft and hardlines with oem hoses and koyo rad. gives me a lot of reassurance in this LA heat. Great upgrade
The Koyo Rad needs it's own custom cap as the OEM won't fit but man does track city daily without issue and fits OEM fans it's a must have.
OEM radiator. Replaced radiator on visit 5 (today). Bmw closed loop network is what eventually led to the radiator being checked as they’ve seen aftermarket radiators actually cool the cars too much, therefore sending the tstat fault in cold weather (this issue occurred first last winter for me, then again 5 times this winter.. all same fault code). Confidence that this is the root cause fix seems to be high so fingers crossed I won’t be updating this in a few days.
'07 V6 SR5 I replaced my leaking rad with a Denso four years ago and it's been absolutely rock solid. **NOTE** I'm not sure if this is still the case but some Denso rads have a couple little notches cut into the sides which are sometimes mistaken for damage as they are not neatly done (literally looks like someone just tapped it with a grinder). These notches are to allow the rad to expand a bit when the metal heats. They are necessary and part of the design even though they sure *look* like damage.
My 95 got an aluminum tank Koyorad last month. These aluminum cylinder heads warp too easily to be messing around with cheaper options.
The previous owner had replaced it with a really cheap plastic tank one. It started leaking about a month after I got the car so I spent the money and got an all aluminum Koyo. Its a happy miata now.
Mishimoto is okay but it's fucking massive and requires more disassembly of the front end of the car to stuff it in there.
Recently got rid of the mishimoto radiator and went back to the updated larger radiator
BMW N51 engine, SULEV radiator, these cars came with a sensor that sticks to the side of the radiator for emissions compliance. Can't even get it aftermarket anymore (last time I checked) new radiator without the sensor is like $150, with the sensor is close to $800, and no you cannot use the old sensor, if you try sticking the old sensor to a new radiator it won't recognize it and it will trigger the check engine light.
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