Trans and Differential Capacities
 

Despite the fact that BMW claims "lifetime fill" for these components, I intend to change the lubricants anyway. What are the fluid capacities of the manual transmission and rear differential?

Thanks!

just out of curiosity, why waste the money? is your X old? been subjected to harsh driving conditions?

:withstupi how many miles on your X?

3280 miles on my X3. Quite frankly, this "lifetime fill" concept by BMW, et al is primarily a market-driven idea that got legs about the time manufacturers began covering normal maintenance for 4 yrs/50K miles. Prior to that, frequent fluid changes were encouraged, of course at the expense of the owner - not the dealer. Certainly lubricants have improved, but the basic result of break-in is the same - metal shavings in the lubricant.

Actually, i was about to retract my statement. It is a good idea to drain all fluids immediately after break-in. Ask your service dept for the quantities, they might be able to help you. Actually, if you order the fluids through your part dept, im sure theyd give you the info.

Metal shavings in the lubricant? come on.... this isn't 1970! :)

If it's a concern, get a magnetized drain plug. Seriously.

Manual transmissions and differentials have been "lifetime fill" for years and years already, and in almost any brand and kind of car, even on the cheaper ones. I'm almost 30 now, and I was still a kid the last time I helped my father, which is (was) a mechanical, to change the lubricant of a car (I still did a lot of changes on heavy trucks), just to have an idea of how long it was.

If you really feel like changing them, you should do it around 250.000km or something. Then maybe the oil is already wasted. Before that it's just a waste of money and time.

If you really really do feel like it, please make sure you get the original and approved brand from BMW and the correct amount of litres. If you do miss the quantity, then you risk breaking something due to lack of lubrication, or too much pressure.