One problem related to manifold/header/muffler/tail pipe has been reported for the 2003 Subaru Legacy. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Subaru Legacy based on all problems reported for the 2003 Legacy.
Car has 78,000 miles. During reg oil change it was discovered ;hat my head gaskets are leaking oil. If not repaired will crack my heads. Cost is $2,2oo-$2,400. This seems very premature for such a serious, expensive repair to be needed. Of course warranty ran out @ 75,000 miles. Didn't extend warranty because in the past I have found that they never cover what breaks.