1,6,7,8 - Series and Mini CooperGeneral Chat related to models that do not fit into particular categories above. Please try to put your discussion in more appropriate sections. This section does cover the 1 Series, MINI Cooper and 8-Series vehicles: BMW 830i, BMW 840Ci, BMW 850i, BMW 850Ci, BMW 850CSi, M8, Alpina B12, BMW CS Concept and others.
BMW states that their transmissions contain a "lifetime" synthetic fluid that does not need changing over the life of the transmission. However ALL syntehtic fluids break down over time. People have complained of poor transmission issues past the 100,000 miles mark. BavAuto and other places recommend changing the fluid every 50,000 miles or once every two years. I recommend this as well. BavAuto, ECS Tuning and Pelican Parts all sell fluid change kits or the items needed.
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