Sad to say the "parts replacer" line is the only way to rid the system of the grenaded HPFP bits. Fuel lines (hard and soft) have to be cleaned out if not replaced. Especially the hard lines being cleaned in an ultrasonic bath. The piezo injectors have to be cleaned but often the places cleaning/rebuilding the injectors charge close to the price of new injectors. Some have 'faked the funk' and have run injectors without cleaning them but eventually have problems 10k miles later. Same goes with the common rail. Fuel regulator, pressure sensor, temp sensor, in tank pump and aux pump should be replaced along with the HPFP.

Does BMW have the same stance as VW that the HPFP will eventually fail sooner or later? Extending a warranty to a measly 120K knowing full well the HPFP can fail even when replaced for an "updated" part? This failure is regardless of the fact that only the best diesel available along with lubrication additives was used during the life of the HPFP. Even after having the fuel tested for "water" and coming back negative, only later to be denied because the car was 1200K over the extended warranty period.

The only preventative fix that could be possible, if engineered for the BMW diesel engine, would be a 2 micron filter kit - 2MicronTech.com ← Helping to keep your Common Rail VW alive!. This kit would save the effort of replacing and cleaning everything after the HPFP output. You would then only be replacing the HPFP and the 2 micron filter. Had I purchased the kit for the A3 TDi it would have been only the $650.00 for the new HPFP and ~$50.00 for the 2 micron replacement filter after the ~$600 for the 2 micron kit.