BMW e65 e66 (02-08) Water Pipe to Alternator Housing GENUINE Water Pipe for Water Cooled Alternator Housing. part# (12 31 1 439 988). Fits: e65: (2002-09/03): 745i: thru 09/2003 Production Date Fits: e65: (2004-2006): 760i Fits: e66: (2002-09/03): 745Li: thru 09/2003 Production Date Fits: e66: (2003-2008): 760Li