Catalytic converter replacement cost
A catalytic converter replacement typically costs $900–$2,500 at a US independent shop for a mainstream vehicle — but your exact cost depends on your year, make, model, and engine.
- Parts
- $400–$2,000
- Labor
- $150–$400
- Total
- $900–$2,500
Ranges are typical US independent-shop figures for a mainstream vehicle — a starting point for sanity-checking a quote, not a quote itself. Each band is estimated on its own, so the total is what these jobs actually tend to come to rather than the parts and labor columns added together.
Replacing a catalytic converter is one of the most expensive common repairs because the part itself contains precious metals. The good news: a P0420 or P0430 code is often a lazy oxygen sensor (a ~$45 part), not a dead converter — so confirm the diagnosis before you spend four figures.
Where the money actually goes
On this job the part is usually the bigger half of the bill. This is one of the few jobs where the part, not the labor, is the bill. A converter's honeycomb substrate is coated in platinum, palladium, and rhodium, and those metals are priced by commodity markets rather than by your vehicle — which is why the parts band here is so much wider than the labor band. The labor itself is comparatively modest on a bolt-on converter: a handful of fasteners, an oxygen-sensor connector or two, and a gasket. The exception is a converter welded into the exhaust or cast into the exhaust manifold, where cutting, fitting, and welding push the labor side up sharply.
What moves the number
Four things move this number more than anything else. How many converters your vehicle has: an inline four usually has one, while a V6 or V8 commonly runs two to four, so a quote covering all of them is a fundamentally different job. Parts tier: a factory converter carries a factory price, while an EPA-compliant aftermarket unit costs less and is legal in most of the country. Where you live: California and the states that follow CARB rules require a CARB-compliant converter, which is a separate and more expensive part number that is not interchangeable with the federal version. And mounting style: bolt-on flanges are quick, welded or manifold-integrated units are not.
- OEM vs aftermarket/CARB-compliant converter
- Number of converters (V6/V8 have 2–4)
- Whether it is welded or bolt-on
- Local emissions requirements (CA/CARB costs more)
How a shop arrives at your quote
Shops do not time your repair with a stopwatch. They look the job up in a labor guide, which publishes a "book time" for that operation on your specific vehicle, and multiply it by their hourly rate — so two shops in the same town can quote differently on identical work, and a fast technician does not make your bill cheaper. Dealer rates generally run above independent rates; the difference buys factory tooling, model-specific training, and factory parts.
Ask for the quote itemized into parts, labor, and shop supplies, ask which parts tier it assumes, and ask what happens if the job turns out worse than the book assumed — a seized bolt is usually re-quoted rather than absorbed. If the fault is not pinned down yet, a diagnostic fee beats replacing parts in sequence.
DIY vs. shop
A bolt-on converter on a rust-free vehicle is a genuine intermediate DIY — you are mostly fighting fasteners, and what you save is the labor line. It stops being worth it quickly. Exhaust hardware seizes, and snapping a bolt turns a short job into a drilling-and-extraction afternoon. If the converter is welded in, you need cutting and welding equipment plus the skill to align the exhaust without leaks. And in a CARB state, fitting a non-compliant converter fails the next inspection, so a cheap part bought online can cost you the whole job twice. If any of that describes your situation, the shop is the cheaper answer.
Short version Bolt-on units are an intermediate DIY (~$400–900 in parts); welded/exhaust-integrated jobs are best left to a shop.
Before you pay for this
Confirm the diagnosis before you spend four figures. A P0420 or P0430 means the computer believes the converter is not cleaning the exhaust efficiently — but the sensor watching the converter can be the thing that is actually wrong. A lazy downstream oxygen sensor, an exhaust leak ahead of that sensor, or an engine running rich from an unrelated fault all produce the same code. Ask to see live upstream and downstream sensor data before you approve a converter.
Start from the symptom or the code rather than the part — both routes below narrow the cause before anything gets bought.
Related symptoms: Failed emissions / smog test , Poor fuel economy
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Ranges like this are a starting point. Tell the AI Mechanic your year, make, model, and the symptom or OBD2 code — it estimates the cost for your exact vehicle, flags the likely cheap fix before the expensive one, and tells you when a shop is genuinely the right call.
Estimate my repair — freeCatalytic converter replacement cost: FAQ
How much does catalytic converter replacement cost?
Typically $900–$2,500 at a US independent shop for a mainstream vehicle. Parts on this job usually run $400–$2,000 and labor $150–$400, though a given quote rarely lands at the edge of both at once. Your exact cost depends on your year, make, model, and engine. The free AI Mechanic gives a vehicle-specific estimate.
Why is the quote mostly parts or mostly labor?
This is one of the few jobs where the part, not the labor, is the bill. A converter's honeycomb substrate is coated in platinum, palladium, and rhodium, and those metals are priced by commodity markets rather than by your vehicle — which is why the parts band here is so much wider than the labor band. The labor itself is comparatively modest on a bolt-on converter: a handful of fasteners, an oxygen-sensor connector or two, and a gasket. The exception is a converter welded into the exhaust or cast into the exhaust manifold, where cutting, fitting, and welding push the labor side up sharply.
Can I replace the catalytic converter myself?
Bolt-on units are an intermediate DIY (~$400–900 in parts); welded/exhaust-integrated jobs are best left to a shop.
What makes catalytic converter replacement cheaper or more expensive?
OEM vs aftermarket/CARB-compliant converter; Number of converters (V6/V8 have 2–4); Whether it is welded or bolt-on; Local emissions requirements (CA/CARB costs more).
Related reading: the full walkthrough on the blog .