You can buy just the pump. I think I bought mine on Amazon. I couldn't find pierburg so I bought a Bosch. They said it's a new design. With improvements for reliability.

The oe pump lasted about 130,000 miles works out to about 26 mph average with 5000 hours which is very reasonable napkin math.

The pump usually comes with the hose clamps needed and I think the connections for power are push on.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)