Add some additional reliability and engine bay styling with the Mishimoto BMW E46 Aluminum Coolant Expansion Tank. The stock E46 expansion tank is prone to failure after years of constant temperature variations. The Mishimoto E46 expansion tank is constructed from durable, TIG-welded aluminum for optimal durability and longevity. The engineers at Mishimoto have designed an aluminum expansion tank that is fully compatible with your stock coolant level sensor! How does it work? Well the stock E46 expansion tank has a floating magnet that activates your low coolant light when the contacts are closed. Engineers replicated this feature with a CNC billet slide and floating magnet that is made to the same specifications as stock.
The E46 expansion tank features CNC fittings that are fully compatible with all of the quick-disconnect fittings on your vehicle! It features a polished finish that will look great in your engine bay. This E46 expansion tank is a direct fit for the stock and Mishimoto BMW E46 Performance Fan Shroud Kit! As with all our BMW performance parts, this expansion tank includes the Mishimoto Lifetime Warranty.
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