I have never heard complaints on any of the brands. Had KOYO on my last 4runner and recently put a DENSO in this one.

Given the choice, DENSO would be the best choice due to them being the OEM supplier as mentioned.

I want to say it's something like 65 bucks online at camelback Toyota. Go to camelback, order an oem, and put that it. I replaced my oem with oem, and it was cheap. Not only that, but if Toyota thought it was good enough to start with, why not keep going? Especially since there is no real other option that provides and increase in how cool you're motor is going to run. I think the thermostat opens up at 162? However if you have to replace the radiator, take some time and put the Toyota long life red coolant in there. All things I have done, and it's been great.

OEM radiator runs $200 from camelback and doesn't qualify for free shipping due to size. I just went through this with them, that's why I went with the Denso for less than half the cost.

Be warned if you get the Denso on Amazon: The radiator seems pretty solid, but the cap may be an issue.

Replaced my radiator a few months ago as part of the timing belt job. Used the $100ish Denso I ordered on Amazon. Was driving home from Denver to Nashville yesterday and almost to KC my truck started overheating...pulled over to discover steam shooting from my overflow tank. Long story short the radiator cap had failed, no longer keeping the coolant under pressure and allowing it to boil. The service advisors at Crown Toyota went above and beyond on a Saturday and and not much later I was back on the road with a full radiator and reservoir and no problems for the rest of the drive home. Quite relieved that it wasn't something more serious.

Moral of the story: keep an eye on your radiator cap.

That's odd. The denso I purchased from amazon didn't include a new radiator cap so I reused my old one.

Me too.

The Denso from Amazon is made in Taiwan. I have one and it has been better than the generic aftermarket replacement that was already on it when I bought it.

Just a heads up, although the Denso is an OEM supplier, the one on Amazon is a cheaper version that is not that same as the Denso your 4Runner rolled off the line with. The OEM one from the dealer is the exact same Taiwanese Denso that you can order from Amazon. However, there is a separate OEM part number that can get you the genuine Japanese made Denso. It's more than double the price I recall - like $450 at least. I'm going to buy that one for my nicer 3rd Gen.

My Denso was made in Taiwan, I believe I bought through Parts Geek, but same radiator I'm sure. Figure I will switch it out in 7-8 years, hopefully it lasts that long. I wonder if it makes sense to buy the OEM at $200ish, probably does considering the ramifications of a busted radiator without the external gizmo to protect the tranny from radiator fluid.

The OEM that costs $200ish is the exact same part you have now but in a different box. The $450 part is the best you can get. Mine is approaching 20 years old and not leaking a drop.

You think the Taiwanese version of the Denso is essentially OEM quality and the $450 model is better?

The Koyo is supposedly made in Japan. If anyone's interested I can look and see if country of origin is stamped on it anywhere. Though I highly doubt where the radiator is made really matters.

I've been running a Koyo replacement for four years and about 60k miles, with no issues. Way back then, Koyo was the weapon of choice.

A quality radiator is only as good as the total cooling system and how it is maintained. The cheaper Amazon denso is more than OK and does the job.

On a side note, my cheap denso PN: 221-0508 did not come with a radiator cap either. I ordered an OEM one, PN: 1640120353

Just trying to clarify this radiator situation. After mixed reviews on aftermarket options, looking on Camelback website it shows two different radiator options.

part# 16400-75181 $331.85 This is the exact OE replacement correct?

part# 16410-AZ011 $119.85 This is a cheaper alternative from Toyota.

Also noticed part# 16410-YZZAJ on some websites.

Has anyone ordered the cheaper version, and if so, who is the manufacturer?

Would hate to buy the less expensive and have it come in being the same Denzo that I could have bought elsewhere for less.

I'm wanting to replace the original radiator in 2001 4Runner with 140k miles and all these options and opinions are confusing. Go new for 3x the money or say screw it and go Denzo or Koyo and hope for the best.

Just order the Denso from Amazon for a 100 bucks and be done. Here you go.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1