Here’s a walk thru of a BMW X3 automatic transmission service with fluid and filter change on a 2008 E83. The 2008 has a 6 speed GM 6L50 transmission that uses Dexron VI automatic transmission fluid. You’ll need 6-7 quarts of replacement fluid, the replacement filter, replacement pan gasket and a few other items I’ve listed below. I found it easiest to simply buy a 2008 BMW X3 transmission service kit which includes the replacement fluid, replacement filter, replacement pan gasket, hardware, O ring, and drain plug. I was paranoid about a fluid leak so I wanted to do everything right for this service. Some of the special tools I needed for this procedure were a torque wrench, and some sort of pump to get the fluid into the transmission...
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