There are many things that BMW sells that are simply rebranded. I'm sure other manufacturers do this, but once one figures out who the supplier is, often he/she can save some money by skipping the dealer markup.

Valeo is the wiper blade supplier from the factory (although dealers do not carry this; Trico is the cheaper, US dealer replacement)

For the M54 engine, Bosch makes the oil filter.

Chevron makes the Fuel Cleaner in the US.

Castrol supplies the motor oil in the US.

I'm still trying to figure out which US supplier sells the coolant.