Engine radiator OEM BMW or KOYORAD

I went with the Koyorad on mine. Everything fit perfectly, no modifications needed, which hasn't always been the case for me

Ive had my car enter limp mode multiple times on a high 80 track days. Coolant temp would spike to the 3/4 marks. When I upgraded the radiator to a koyorad I never had issues again.

I am here to say the Koyorad fits perfectly fine with Cobb’s charge pipe. The upper radiator hose had to be completely taken out to get the pass side fan installed but no trimming or cutting of fan shroud. The radiator looks amazing as well.

Experienced a full separation of the top (and possibly bottom) plastic from the aluminum portion - would leak about as fast as I could pour it in. Replaced with Koyorad A2807 from RockAuto.com for $104 plus tax and shipping. Nominal time to repair for a non-mechanic is probably 4-to-6 hours - call it a day project.

got a Koyorad off Rock Auto for around $100 and slapped it in there. Runs like a champ. It is a pretty easy job if you're mechanically inclined.

I've had a Koyorad in my 97 for 5 years now and it's been great.

i recently put a koyorad in mine as well, the hoses at the bottom took me forever to work with but it was worth it

I got the thicker Koyorad and managed to get it to fit with some redneck engineering, but it was a squeeze.

I've replaced a radiator on a BMW 2018 3 Series with as little as 22k miles. This particular vehicle was leaking from the side tank of the rad, where the plastic is crimped to the aluminum. Nothing abnormal could be seen, just the crimp failed.

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.