The tech had also found the secondary air injection ports were packed with carbon which wasn't helping the air pump durability either. Probably consuming more oil through the CCV than normal from the excess crankcase pressure too.


Makes me wonder just how long the cat had been deteriorating.


2002 X5 3.0 383,700 miles
2014 428i 71,700 miles


2004 325i sold at 123,600 miles
2001 325i sold at 66,000 miles


1970 Firebird Under restoration