Mine was replaced earlier this week. 446 pump + software update.
I've lost 50% of low end boost. Car feels like they replaced my n54 with the n52. Shouldn't be the accelerator remapping because I've already got 250+ miles of hard driving on it, so it should be relearned by now.
Already called and complained to BMW NA, but I know it's pointless. Going to take it back to the dealer and have a tech drive it like he stole it, so he too can see how much power is gone. Not sure what they can do, short of giving me my old pump and old programming back, because everything is installed correctly (No boost/vacuum leaks, wastegates are working, yadda yadda yadda)
Nothing like paying for 300tq and getting 250.
