Mufflers reduce engine noise and filter exhaust. If your muffler suddenly begins to make noise, it may indicate a problem with your exhaust system. A broken muffler can allow exhaust to enter the passenger compartment, so an inspection of your exhaust system is recommended for any needed repairs. Mufflers vary in their ability to filter noise. If your exhaust system is not broken, consider replacing your muffler with one that filters noise more effectively.
Look under the rear of your car and ensure your muffler straps are still intact. Muffler straps, or exhaust hangers, connect your muffler to the car and can break. If you see a broken strip of rubber or your muffler is no longer firmly attached to the underside of the car, you may need to replace the straps.
Listen for rumbling or low-pitched rhythmic sounds while your car is in operation. This indicates you have a broken muffler that needs repair.
Inspect your exhaust system if your muffler suddenly begins to make noise. A mechanic can inspect the pipes and muffler for rust, holes, loose pipes or leaks.
Replace your muffler if it is broken. Mufflers not only stifle noise, they prevent exhaust from entering the passenger compartment of the car. It is important to keep your muffler in good repair.
Check to see if you have the correct muffler for your car. Especially if you have a used vehicle, the muffler may have been adapted to allow for more engine noise.
Purchase a more effective muffler if yours continues to be noisy after having the car inspected. Excessively noisy mufflers are violations of noise ordinances in a several jurisdictions.
