Exhaust leak repair cost ranges from a small bill for a clamp or gasket to well over $2,000 for a catalytic converter. According to RepairPal’s estimates, replacing an exhaust manifold gasket averages about $417 to $596, a catalytic converter about $2,280 to $2,480, and an exhaust pipe replacement about $1,297 to $1,354, before taxes and fees.
The price depends on where the leak is and which part failed. A leak is also a safety issue: exhaust contains carbon monoxide, so get it checked rather than driving with it for months.
Last updated: October 25, 2026. Prices are estimates, not quotes.
Exhaust Leak Repair Cost by Part
| Repair | Average Cost (RepairPal) | Notes |
|---|---|---|
| Exhaust manifold gasket | $417 – $596 | Mostly labor ($376 – $552); parts about $41 – $45. |
| Catalytic converter | $2,280 – $2,480 | Mostly parts (about $2,044 – $2,133); labor about $236 – $347. |
| Exhaust pipe replacement | $1,297 – $1,354 | Parts about $1,181 – $1,185; labor about $115 – $169. |
| Clamps, small patches, welded repairs | Often much less | Cost varies by shop; see our welding guides below. |
Sources: RepairPal manifold gasket, catalytic converter and exhaust pipe estimates. RepairPal notes these figures do not account for your location and that related repairs may be needed. We could not confirm reliable national figures for flex pipes, mufflers or clamps, so ask a shop to quote those.
Signs of an Exhaust Leak
- Ticking or tapping from the engine bay, often loudest on a cold start, can point to a manifold or gasket leak.
- Hissing or puffing under the car can point to a flex pipe, flange or pipe joint.
- A deep rumble or roar from the rear often means a muffler or tailpipe problem.
- Rattling may be a loose heat shield or hanger, or damaged parts inside the catalytic converter.
- Soot marks, a check engine light or an exhaust smell in the cabin can all signal a leak.
RepairPal notes technicians usually find leaks by looking for black soot marks and burned nearby parts, and sometimes use smoke testing or plug the exhaust to check.
Is It Safe to Drive With an Exhaust Leak?
Not for long. The CDC warns that a small exhaust leak can let carbon monoxide build up inside a vehicle, and recommends having a mechanic check your exhaust system yearly. Symptoms include headache, dizziness, weakness, nausea and confusion, and they can be mistaken for the flu. If you notice an exhaust smell inside the car, open the windows and have it inspected right away. Source: CDC carbon monoxide.
What Affects Exhaust Leak Repair Cost?
- Location of the leak: Parts near the engine, such as the manifold, take more labor to reach.
- Part and material: A catalytic converter costs far more than a gasket or clamp.
- Rust and seized bolts: Corroded hardware can add labor if bolts break or need to be cut.
- Vehicle: Larger vehicles, dual exhausts and some European models cost more.
- Shop type: Independent muffler shops often charge less than dealerships.
- Diagnosis: Some shops charge for smoke testing or inspection. Ask if it is credited toward the repair.
DIY or Professional Repair?
RepairPal says a simple bolt-on pipe section can be manageable for a home mechanic, while custom pipe that needs bending and welding calls for specialized equipment. Rusted bolts may need heat or cutting to remove.
- DIY-friendly: Replacing a bolt-on clamp, gasket or hanger on a cold exhaust, with the car safely supported.
- Better left to a shop: Manifold work, catalytic converters, flex pipes and anything needing welding or cutting.
- Patches: Exhaust tape or putty are temporary at best, and not a safe fix near the engine, where heat is highest.
If your leak needs welding, see our guides to welding a car exhaust and cutting and welding an exhaust.
Repair or Replace the Exhaust?
RepairPal recommends inspecting the whole exhaust system, because one corroded spot often means others will fail soon. If several sections are rusted, a larger repair may cost less over time than patching one leak after another. Get a quote for both.
How to Save on Exhaust Leak Repair
- Get two or three written quotes from independent exhaust or repair shops.
- Ask whether a weld or clamp repair is possible instead of replacing a whole section.
- Compare OEM and quality aftermarket parts, but confirm the part is legal for your vehicle, especially for catalytic converters and emissions equipment.
- Fix leaks early, before rust spreads and an upstream leak affects engine performance or emissions.
- Wash the underside in winter to remove road salt, which speeds up corrosion.
Other car repair cost guides: oil leak repair cost and car AC repair cost.
Frequently Asked Questions
How Much Does Exhaust Leak Repair Cost?
It depends on the part. RepairPal averages about $417 to $596 for a manifold gasket, $1,297 to $1,354 for an exhaust pipe replacement and $2,280 to $2,480 for a catalytic converter. Clamp or weld repairs can cost less.
Can I Drive With An Exhaust Leak?
It is not recommended. Exhaust contains carbon monoxide, which can build up inside a vehicle. Have it inspected promptly.
Where Is My Exhaust Leak Coming From?
Ticking under the hood often points to a manifold or gasket. Hissing under the car suggests a flange or flex pipe, and a roar from the rear suggests a muffler or tailpipe problem. A shop can confirm with a smoke test.
Can I Fix An Exhaust Leak Myself?
Simple bolt-on clamps and sections can be a DIY job on a cold exhaust. Manifold, converter and welding work is better left to a shop.
How Long Does Exhaust Leak Repair Take?
Simple gasket or clamp repairs can be done in a short visit, while manifold work and seized bolts take longer. Ask the shop for a time estimate with your quote.
Bottom Line
Expect anything from a modest bill for a clamp or weld to several hundred dollars for a manifold gasket and over $2,000 for a catalytic converter. Get the leak located, compare written quotes and do not delay a repair because of the carbon monoxide risk.
