BMW 3-Series E46 Radiator 1999-2006
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Interested in purchasing our E46 aluminum radiator? Check out our product page linked below!
We are pretty pumped about our new BMW performance parts! Our prototype radiator looks and fits great, so now let's make sure it performs as well as we intended. As we noted previously, we've made a variety of improvements over the stock core to improve heat transfer and efficiency. Let's take a look at the specs!
Core Improvements

BMW E46 radiator coolant surface area comparison
Our first comparison is coolant surface area, which is a measure of the area of the coolant tubes within the core. Greater tube area results in increased heat transfer as well
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Interested in purchasing our E46 aluminum radiator? Check out our product page linked below!
It's been a while since our last update. Don't worry, we have not abandoned our E46 aluminum radiator project. In fact, this may be the most exciting update yet. We are getting closer to bringing you guys a much-needed reliable and efficient radiator solution. Our line of BMW performance parts is growing!
Prototype Images
The wait is over! Check out a couple shots of our prototype radiator!

Mishimoto prototype E46 radiator
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Interested in purchasing our E46 aluminum radiator? Check out our product page linked below!
3D Modeling
After some serious 3D modeling work in Solidworks, our first prototype unit is complete. Let's check out a few of the renders!

Mishimoto E46 3-series aluminum radiator 3D model
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Interested in purchasing our E46 aluminum radiator? Check out our product page linked below!

E46 325ci test vehicle
A peek under the hood reveals a clean and entirely stock engine bay. This would be helpful because we know what components we will need to incorporate into the design of our radiator. It will also help provide clearance information in regard to how much we can increase the size of our radiator.
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