Originally Posted by ign335i
Upgraded in that they would fail less? Sure some of the early ones were bad, but the failure rate for new ones is pretty low. I am at 75k and 4+ years running E85 for the majority of it without any issue. These cars are temperamental and had injector issues in the beginning, but like the HPFP, that is mostly resolved. I would be worried more about someone making them worse at this point since the injectors are not servicable.
Mine are going on 40,000 hard tunes miles and are still working fine. If you haven't replaced your injectors you you might want to get the new ones. Injector problems are more often caused by bad coding.