While my car was parked inside my garage there was a sudden "bang". the following morning i discovered while backing out of garage that the driver side coil spring had broken. had i been driving while this happened it would have resulted in the shredding of the front driver side tire possibly resulting in a severe accident. the reason i own volvo is principally dye to it's reputation for safety. in fact, volvo uses the term safety in all it's advertising. this is a grave flaw and i ask nhtsa to investigate weather this is a common flaw in the 2004 volvo xc70 and other volvo's with this coil spring. *tr