I'm wonder if there is any difference between Mfg Part#06C103217G and Mfg Part#06C103217H? I have 2004 a4 Quattro v6, which calls for Mfg Part#06C103217G. However, indie shop installed Mfg Part#06C103217H. Any difference between one ending in H and other on ending in G? Should I be worried? Can my engine be damaged from wrong part? Brought in because dealer said valve cover gaskets were seeping oil . Shop replaced last year so warrantied work, but said it probably was breather hose assembly, so it replaced with the one ending in H.