Engine radiator OEM BMW or Denso

I have a 2008 e90 335xi FBO with 197k miles and I am still on my original BMW radiator. If the stock original BMW stamped one works well... why experiment?

I also replaced the radiator (I went Denso, not oem). It\u2019s gxor-ish recommended preventative maintenance every 100k.

I spent two years (off and on, as it only overheated when idling in 90+ degree conditions or when doing low-speed jeep trail climbing in the heat) chasing this on my rig. Over time, replaced fluid, thermostat, radiator cap, clutch fan. No joy. Finally pulled the radiator, and the front fins were horribly blocked. Replaced with a new Denso, and problem solved. Only issue with the new Denso was that the mounting rails on the new radiator were shite, but it was a matter of four bolts to swap over the old rails (with upper shroud still attached) to the new radiator.

I personally I have used a Denso radiator for my Mazda protege and it been working fine for almost 30,000 miles

I had an older BMW myself (E36) and if you want reliability you'll need aftermarket (improved) radiator, radiator hoses and water pump.

plastic radiator ends tend to crack and leak on the 4.4's. make sure you get an aluminum upgrade.

The white tank has never been the issue for me, leaks are always in the radiator frame surrounding that tank. Somewhere at the bottom, probably where the lower hose goes. The plastic is brittle crap and it develops micro-fractures that become cracks over time.