A transmission cooler is designed to keep fluids at a nominal temperature during periods of heavy use, or high heat. If yours is leaking, replace it now to prevent fluid loss and catastrophic failure.
CSF is one of the premier cooling product specialists available on the market today. One item that is often overlooked is the oil cooler. Luckily CSF has taken up the task of upgrading the oil cooler as well. If the oil runs too hot, it can lead to a reduction in wear protection and damage to the head, block, or the turbo system. This unit features a dual-pass design with 20% more surface area and 30% greater efficiency than stock, but still fits in the stock location without any issues. Alternative to OE # 17227521376 Fits the following BMW: 2006-2013 E9X BMW M3 335 2009-2015 E84 BMW X1 35iX
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CSF redesigned this cooler and went with a more traditional inlet/outlet orientation. The new single pass design features high efficiency and high durability, but with vertically oriented inlet and outlet connections.
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