Are you planning on doing one on the 550i or are you just curious? The reason I ask, is that essentially, they are all the same. What you really need to discover is the oil that BMW specs, & capacities. Call the parts dept to see what they say, that's where I got the info. Everything else will pretty much be the same. If you have basic skills and tools and you have been doing this before, it will be a cake walk. If you're new to this, you may want to have someone either help you, or get it done some place by pros.
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