The BMW service intervals are set by engine time and indicated on the dash when you first turn the ignition on. If you choose not to follow that changing the engine oil and filter every 10,000 km ...
There's a common misconception about the "lifetime transmission fluid" or "sealed-for-life transmission" of mainstream automakers like Audi, Toyota, BMW, Land Rover, Jaguar, Dodge, Jeep, etc. The ...