Question on Fuel Pump and Filter Replacement

I have a 2011 Cooper S Convertible with 72k miles. Does it have two fuel pumps, or just one? I see references to a high pressure pump up on the engine, and to a BMW-style fuel pump inside the fuel tank. If just one pump, which reference is correct? If there are two assemblies and I am having fuel pump problems, do I replace both? I am already planning to replace the fuel filter

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[Nick at Pelican Parts]

S models have an in tank and a high pressure pump on the engine.

Here is a video I made showing how to test them both.

https://www.youtube.com/watch?v=gfAyti805GE

- Nick