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BMW 3-Series E46 Radiator 1999-2006

  1. Mishimoto E46 3-Series Aluminum Radiator R&D, Part 4: Prototype Testing

    Mishimoto E46 3-Series Aluminum Radiator R&D, Part 4: Prototype Testing

    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
    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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  2. Mishimoto E46 3-Series Aluminum Radiator R&D, Part 3: Prototype Evaluation

    Mishimoto E46 3-Series Aluminum Radiator R&D, Part 3: Prototype Evaluation

    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
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  3. Mishimoto E46 3-Series Aluminum Radiator R&D, Part 2: 3D Models

    Mishimoto E46 3-Series Aluminum Radiator R&D, Part 2: 3D Models

    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

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  4. Mishimoto E46 Non-M Aluminum Radiator R&D, Part 1: Stock Radiator Evaluation

    Mishimoto E46 Non-M Aluminum Radiator R&D, Part 1: Stock Radiator Evaluation

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

    Mishimoto BMW E46 Non-M Performance Aluminum Radiator!

    E46 325ci test vehicle
    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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