N55 HPFP Failure

Can the HPFP fail on a N55?

• Yes, my HPFP failed at 38,000 miles. 

What were the symptoms? 

• Very long cranks, rough idle, engine would randomly surge between 600 - 1800 rpm at idle and low speeds. The latter is particularly scary when pulling into or out of tight parking spots and the car would lurch. 

What did I do?

• I believed failing HPFP were confined to the N54 and were resolved with the N55, I was wrong. I brought my car into the dealer and they diagnosed my HPFP was failing and replaced it. My car issues went away with the new HPFP.

Why am I posting this? 

• Every once in a while I will see a post on the internet asking if the N55 fixed all the HPFP issues. I would say probably with the newer BMWs. Model years built right after N54 may still have the faulty HPFPs. 
• If you are looking to buy a used early model N55, the HPFP has a warranty of 10 years/120,000 miles and yes it can prematurely fail on you.