Do I have to replace the timing belt on my 2004 Honda Civic at 105000 miles?

According to the maintenance schedule in the owner's manual for the 2004 Honda Civic, the timing belt should be replaced at 105,000 miles or 7 years, whichever comes first. While it's possible for the timing belt to last longer than this, it's not recommended to go beyond the recommended replacement interval. If the timing belt breaks or fails while the engine is running, it can cause serious damage to the engine. Replacing the timing belt is a relatively inexpensive repair, and it's much less expensive than having to repair a damaged engine. For these reasons, it's best to replace the timing belt at the recommended interval.