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My 2011 335i HPFP failed too after 30K. Long crank problem. Dealer replaced my original 13-51-7-613-933 HPFP with 3-51-7-616-446. It is supposed to be the 4th revision. Not sure how it differs from the other 446's. Gas mileage and drivability are improved. Keeping my fingers crossed.
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