If your car's muffler or exhaust pipe starts to develop a hole or crack, it will need to be repaired as soon as possible. Depending on the severity of the damage, a muffler repair can cost anywhere from $100 to $400.
If the damage is relatively minor, such as a small hole or crack, then a patch job may be all that is needed. This will usually cost between $100 and $200. However, if the damage is more severe, such as a large hole or multiple cracks, then the muffler will likely need to be replaced. Replacing a muffler can cost between $200 and $400.
Of course, these are just estimates and the actual cost will vary depending on the make and model of your car, where you live, and the mechanic you use.