Honda 2003 Civic Coupe Owner's Manual page 50

Additional Information About Your Seat Belts
If a seat belt is worn during a crash,
it must be replaced by the dealer. A
belt that has been worn during a
crash may not provide the same level
of protection in a subsequent crash.
The dealer should also inspect the
anchors for damage and replace
them if needed.
Automatic seat belt tensioners that
deployed during a crash must be
replaced.
For information on how to clean your
seat belts, see page 253 .
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Driver and Passenger Safety