# Catalytic converter replacement cost

- **Typical cost:** $1,000-$3,000
- **Parts:** $750-$2,500
- **Labor:** 1-3 hours
- **Dealer:** $1,800-$4,000

## Quick answer

Replacing a catalytic converter usually costs $1,000 to $3,000 at an independent shop. The part is most of the cost because it contains precious metals. Cars sold in states that follow California emissions rules need a more expensive approved converter. Fix any misfire or oil-burning problem first, or the new converter can fail too.

## What is catalytic converter and why does it need replacing?

The catalytic converter sits in the exhaust and cleans the gases leaving the engine. Inside a steel shell is a ceramic or metal honeycomb coated with platinum, palladium and rhodium. As hot exhaust passes through, those metals help turn carbon monoxide, unburned fuel and nitrogen oxides into carbon dioxide, water vapor and nitrogen. Oxygen sensors before and after it let the engine computer check that it is working.

A converter usually fails because of an engine problem rather than age. Misfires send raw fuel into it, which burns inside and can melt the honeycomb. Burning oil or leaking coolant coats the catalyst so it stops working. A blocked converter chokes the engine and cuts power, and physical damage from road debris or a broken internal mount causes rattling. Converter theft is also a common reason for replacement. A healthy converter often lasts 10 years or more, and frequently the life of the vehicle, so fixing the root cause first protects the new part.

## How much does catalytic converter replacement cost?

|  | Typical cost |
| --- | --- |
| Parts | $750-$2,500 |
| Labor | $150-$500 (1-3 hours) |
| Total at an independent shop | $1,000-$3,000 |
| Total at a dealer | $1,800-$4,000 |

## Cost by vehicle type

| Vehicle | Typical cost |
| --- | --- |
| Compact car | $1,000-$1,700 |
| Midsize sedan | $1,100-$2,000 |
| Small SUV/crossover | $1,200-$2,200 |
| Full-size truck/SUV | $1,400-$2,800 |
| Luxury/European | $1,800-$3,000 |

Ranges are for an independent shop. Expect the high end or more for European luxury makes and dealer service.

## What changes the price?

- **Aftermarket or original part.** An approved aftermarket direct-fit converter costs much less than an original-equipment one from the dealer. Original parts often hold more precious metal and may last longer, but both must meet the emissions rules for your car.
- **State emissions rules.** California and the states that follow its emissions rules require a CARB-approved converter with a matching label for your engine. Those cost more, and fewer aftermarket options exist, so drivers there usually pay more for the same car.
- **Number and location.** Some engines have a converter built into the exhaust manifold, which takes more labor to replace. V6 and V8 engines may have two or more converters, and a quote may cover only one of them.
- **Rusted hardware.** Rusted bolts and studs can snap and need drilling, and a corroded pipe may need cutting and welding. Oxygen sensors seized in the old converter often have to be replaced, which adds parts and time.

## What happens during the job?

1. Read the codes and live oxygen sensor data, and check for exhaust leaks, misfires and oil or coolant burning.
2. Confirm that the converter is the fault, for example by comparing upstream and downstream sensor readings.
3. Check the emissions label and choose a converter legal for your state, engine and model year.
4. Unbolt or cut out the old converter, remove the oxygen sensors and fit the new unit with new gaskets and hardware.
5. Reinstall or replace the oxygen sensors, check for leaks, clear the codes and drive until the catalyst monitor reports ready.

## What should a fair quote include?

- A converter legal for your state and engine
- New gaskets and hardware
- Moving or replacing the oxygen sensors as needed
- Finding the root cause, such as a misfire or oil burning
- Clearing codes and confirming the readiness monitor

## How to pay less for catalytic converter replacement

- Make sure a failing rear oxygen sensor or exhaust leak is not causing the P0420 or P0430 code before buying a converter.
- Ask about an approved aftermarket direct-fit converter instead of an original-equipment one, if it is legal in your state.
- Check whether your car's federal emissions warranty still covers the converter; many cover it for 8 years or 80,000 miles.
- Get a written quote from an exhaust or muffler shop as well as a general repair shop, since prices vary widely.
- Fix misfires and oil burning promptly so you do not pay for a second converter later.

## Signs you need it

- Check engine light with code P0420 or P0430
- Rotten-egg smell from the exhaust
- Loss of power or the car struggles to accelerate
- Rattling from under the car (broken inside)
- Failed emissions test

## Frequently asked questions

### How much does a catalytic converter replacement cost?

Most independent shops charge $1,000 to $3,000 in 2026. Dealers often charge $1,800 to $4,000. The part makes up most of the bill, usually $750 to $2,500. Converters built into the manifold, engines with two converters and states that require CARB-approved parts are at the high end.

### Do I need to replace the catalytic converter for a P0420 code?

Not always. A P0420 can come from a failing rear oxygen sensor, an exhaust leak near the sensors or an engine problem such as misfires. A good shop checks those first, using live sensor data and a leak check, before replacing a converter that may still be working.

### Why are catalytic converters so expensive?

They contain precious metals such as platinum, palladium and rhodium that clean the exhaust. Those metals cost a lot, and the part must also meet federal or state emissions rules for your engine. Converters built into the exhaust manifold also take more labor to replace, which raises the total.

### Can I drive with a bad catalytic converter?

Often for a while if the car runs normally, but you may fail an emissions test. A clogged converter can cut power and overheat the exhaust, and a flashing check engine light means misfires that can damage it further. Get it diagnosed soon rather than ignoring the light.

### Is a catalytic converter covered by warranty?

Often, yes. Federal rules require the converter to be covered by an emissions warranty, commonly 8 years or 80,000 miles on newer cars, and some states require longer coverage. Check your warranty booklet. Damage caused by misfires, accidents or theft may not be covered.

### Can I replace a catalytic converter myself?

It is generally a shop job. Rusted bolts often snap, some converters need welding, and the replacement must be legal for your state and engine. Installing the wrong converter can fail inspection and break emissions laws. A muffler or exhaust shop is usually the best place for this work.

### Are aftermarket catalytic converters any good?

Approved aftermarket direct-fit converters work for many cars and cost much less than original parts. Buy one listed for your exact engine and legal in your state, such as CARB-approved where required. Very cheap universal converters may not keep the check engine light off or pass inspection.

### What causes a catalytic converter to fail?

Engine problems usually cause it. Misfires send unburned fuel into the converter, which overheats and melts the inside. Burning oil and coolant leaks coat the catalyst so it stops working. Road damage and theft are other common reasons. Fixing the cause first protects the new converter.

### What should I do if my catalytic converter is stolen?

Report the theft to police and your insurer, since comprehensive coverage may pay for it. The car will be very loud and should not be driven far, because exhaust can leak near the cabin. A shop can replace the converter and any cut pipes or damaged oxygen sensors.

### Will a new catalytic converter pass emissions inspection?

It should, if the engine has no other faults and the converter is legal for your car. After the repair, the catalyst readiness monitor must run before testing, which can take several days of normal driving. Ask the shop to confirm the monitor is ready before your inspection.

## Sources

- [EPA: On-Board Diagnostics (OBD)](https://www.epa.gov/state-and-local-transportation/vehicle-emissions-board-diagnostics-obd)
- [Car Care Council: Car care guide](https://www.carcare.org/car-care-guide/)

## How long it lasts

- [How long do catalytic converters last?](https://diagxcar.com/how-long/catalytic-converter): 10 years or more
- [How long do oxygen sensors last?](https://diagxcar.com/how-long/oxygen-sensor)

## Symptoms

- [Why does my car hesitate when I accelerate?](https://diagxcar.com/symptoms/car-hesitates-when-accelerating)
- [Why does my car smell like something is burning?](https://diagxcar.com/symptoms/burning-smell-from-car)
- [Why is black smoke coming from my exhaust?](https://diagxcar.com/symptoms/black-smoke-from-exhaust)
- [Why is blue smoke coming from my exhaust?](https://diagxcar.com/symptoms/blue-smoke-from-exhaust)
- [Why does my car lose power when accelerating?](https://diagxcar.com/symptoms/car-loses-power-when-accelerating)
- [Why does my car smell like rotten eggs?](https://diagxcar.com/symptoms/car-smells-like-rotten-eggs)

## Related codes

- [P0420 Catalyst System Efficiency Below Threshold (Bank 1)](https://diagxcar.com/codes/p0420)
- [P0430 Catalyst System Efficiency Below Threshold (Bank 2)](https://diagxcar.com/codes/p0430)
- [P0300 Random/Multiple Cylinder Misfire Detected](https://diagxcar.com/codes/p0300)
- [P0140 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)](https://diagxcar.com/codes/p0140)
- [P0172 System Too Rich (Bank 1)](https://diagxcar.com/codes/p0172)
- [P0175 System Too Rich (Bank 2)](https://diagxcar.com/codes/p0175)
- [P0301 Cylinder 1 Misfire Detected](https://diagxcar.com/codes/p0301)
- [P0421 Warm Up Catalyst Efficiency Below Threshold (Bank 1)](https://diagxcar.com/codes/p0421)
- [P0431 Warm Up Catalyst Efficiency Below Threshold (Bank 2)](https://diagxcar.com/codes/p0431)

## Other repair costs

- [Clutch replacement cost](https://diagxcar.com/cost/clutch-replacement): $1,000-$2,500
- [Car battery replacement cost](https://diagxcar.com/cost/car-battery-replacement): $150-$450
- [Control arm replacement cost](https://diagxcar.com/cost/control-arm-replacement): $300-$850
- [Camshaft position sensor replacement cost](https://diagxcar.com/cost/camshaft-position-sensor-replacement): $120-$350
- [Coolant flush cost](https://diagxcar.com/cost/coolant-flush): $110-$260
- [Brake rotor replacement cost](https://diagxcar.com/cost/brake-rotor-replacement): $300-$800
- [Crankshaft position sensor replacement cost](https://diagxcar.com/cost/crankshaft-position-sensor-replacement): $150-$500
- [Brake pad replacement cost](https://diagxcar.com/cost/brake-pad-replacement): $150-$400
- [CV axle replacement cost](https://diagxcar.com/cost/cv-axle-replacement): $250-$700
- [Brake fluid change cost](https://diagxcar.com/cost/brake-fluid-change): $100-$220

## Warning lights linked to this

- [Check engine light](https://diagxcar.com/warning-lights/check-engine)

## Terms explained

- [What is Catalytic converter?](https://diagxcar.com/glossary/catalytic-converter)

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Source page: https://diagxcar.com/cost/catalytic-converter-replacement
Updated: 2026-11-03
General information, not a substitute for a qualified mechanic.