BMW 3-Series E46 Radiator 1999-2006

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 as increased fluid capacity. We've increased coolant surface area by 18% over the stock radiator core.

BMW E46 radiator air surface area comparison

The chart above depicts air surface area, which is a measure of the area of the external cooling fins on the radiator. Air surface area is a big contributor to cooling efficiency and performance. You see,

Interested in purchasing our E46 aluminum radiator? Check out our product page linked below!

Mishimoto BMW E46 Non-M Performance Aluminum Radiator!

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

Mishimoto prototype E46 radiator

Mishimoto prototype BMW E46 radiator

Here's a look at the engine-facing side of this radiator.

Mishimoto prototype BMW E46 radiator

As you can see, we've included all the factory fan shroud mounting points and the inlet/outlet has been CNC-machined for a leak-free install with the stock quick-disconnect hoses.

Here is a close-up of the CNC component!

Mishimoto prototype BMW E46 radiator quick

Interested in purchasing our E46 aluminum radiator? Check out our product page linked below!

Mishimoto BMW E46 Non-M Performance Aluminum Radiator!

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

Mishimoto E46 3-series aluminum radiator 3D model

As you can see, the rear of the radiator features a variety of complex pieces. The quick-disconnect fittings have been replicated and will be CNC-machined. All stock mounting points have been included in our design so that this radiator drops into place just like the stock unit.

Take a look at the front side of the radiator.

Mishimoto E46 3-series aluminum radiator 3D model, front view

Mishimoto E46 3-series aluminum radiator 3D model, front view

Mishimoto E46 3-series aluminum radiator 3D model, front view

Although you can't see much of the core in these shots, we did spend a great deal of time designing this