If your car develops a loud exhaust note or unusual noise from the engine or exhaust system, it usually points to a leak, damaged component, or blockage in the exhaust. This can reduce performance, increase emissions, and make the vehicle non-compliant with noise regulations. An assessment will identify the source of the noise and prevent further damage.

What does it mean if you hear a loud exhaust note or noise?

A louder-than-usual exhaust note often means there’s a crack, hole, or loose connection in the exhaust system. It may also be caused by a damaged muffler, catalytic converter, or exhaust manifold gasket.

Common causes of loud exhaust noises

• Cracked or leaking exhaust manifold
• Damaged or rusted muffler or exhaust pipe
• Blown exhaust manifold gasket
• Loose or broken exhaust hangers
• Failing catalytic converter
• Aftermarket exhaust modifications

Why do you need to fix this problem quickly?

Exhaust leaks reduce engine efficiency, increase fuel consumption, and release toxic fumes into the cabin. Ignoring the issue can also damage sensors (like oxygen sensors) and lead to more expensive repairs.

How do you know when to get it checked?

You should book an inspection if:

• Your exhaust sounds louder or harsher than normal
• You hear ticking or tapping from the engine bay
• There is visible rust, holes, or cracks in the exhaust system
• You smell exhaust fumes inside the cabin
• Your fuel efficiency has dropped suddenly

What happens during an assessment?

A mechanic will:

1. Inspect the exhaust system from the engine to the tailpipe
2. Check for leaks, cracks, or loose fittings
3. Examine the muffler, catalytic converter, and hangers
4. Inspect the exhaust manifold and gasket for leaks
5. Recommend repair or replacement of damaged parts

How much does it cost to fix?

Minor exhaust repairs (such as patching or replacing a gasket) may cost $200–$400. Muffler or pipe replacement typically ranges from $400–$800+. A new catalytic converter may cost $1,200–$2,500+.

Is it unsafe to drive with a loud exhaust?

Yes. Exhaust leaks can allow toxic fumes into the cabin, reduce engine performance, and make the vehicle illegal to drive due to excessive noise or emissions. It should be repaired promptly.