Loud Exhaust
A sudden roar or rumble usually means a hole or leak in the muffler, a pipe or a flex joint.
Can I drive it? Drive with care
Usually safe short-term, but exhaust fumes (carbon monoxide) can enter the cabin, and it can fail an inspection.
Typical repair cost
$100-$300 for a patch, $150-$500 for a muffler, $250-$600 for a flex pipe.
General US estimates, not quotes. Prices vary by region, vehicle and shop.
Symptoms to Look For
These signs indicate you might be experiencing this issue
- Unusually loud exhaust noise
- Rattling or buzzing under car
- Possible loss of power
- Exhaust fumes entering cabin
Potential Causes
Most likely reasons for this problem, sorted by probability
Repair Solutions
Step-by-step instructions to diagnose and fix the problem
1Exhaust System Inspection
- 1
Listen for leaks along entire exhaust system
- 2
Check for holes or rust in pipes and muffler
- 3
Inspect hangers and mounts
- 4
Check catalytic converter for damage
- 5
Repair or replace damaged components
Need professional help?
Find a repair shop near you, or describe your exact symptoms to the AI mechanic
When to See a Mechanic
Do not wait if any of these apply
- Exhaust smell in the cabin
- A rattle from underneath
- A check engine light as well
How to Prevent It
Simple habits that stop this problem coming back
- Look for rust on the exhaust yearly
- Avoid only very short trips, which leave moisture in the exhaust
- Repair loose hangers early
Frequently Asked Questions
Can a loud exhaust be dangerous?
A leak ahead of the cabin can let carbon monoxide in. Keep a window cracked and get it fixed.
Will it fail inspection?
In many states, yes, if it leaks or is excessively loud.
Related Issues
AI-generated and informational only. This is not a diagnosis of your specific vehicle and does not replace inspection by a qualified technician.