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Car & Auto Repair

Catalytic converter replacement cost calculator

Work out what replacing a catalytic converter will cost from the part, the labor, and the diagnostic. The part is the swing: an aftermarket converter is a fraction of an OEM one where it is legal to fit, and California's CARB rules and some cars force the expensive route. The calculator adds up your quote.

§ 01 Your numbers

Change anything. The answer updates as you type.

The converter itself, the biggest and most variable line. A universal aftermarket unit is at the low end; a CARB-compliant or direct-fit OEM converter for a modern car runs into the thousands.
Time to fit it. A bolt-on converter is quick; one welded into the exhaust, or a car with several converters, takes longer.
The shop's hourly rate. Dealers charge more than independents.
Confirming the converter is actually the fault, not a sensor or a fuel-mixture problem upstream. Often credited toward the repair.
New oxygen sensors, gaskets, or a theft-deterrent shield or cage fitted at the same time. Zero if none.
Estimated cost
$1,170

Typical range $936 – $1,638

  • Converter (part)$900
  • Labor (hours × rate)$180
  • Diagnostic$90
  • Sensors, gaskets & anti-theft$0
  • Total$1,170
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$800 to $2,500 is a direct-fit or CARB-compliant converter. Rule out the sensor first, and ask about a theft shield.

What this assumes, and where it could be wrong

Every one of these is a place the number could be off. They are here because you should be able to check our working, not because we are hedging.

THE PART IS THE SWING, AND OEM VERSUS AFTERMARKET IS THE FORK.
A universal aftermarket converter is a fraction of the price of a direct-fit OEM one, and where an aftermarket unit is legal it is the obvious choice. But California and the states that follow its CARB rules require an approved converter, and some newer or hybrid cars only have expensive OEM options, which is what turns a few-hundred-dollar job into a few-thousand-dollar one. Confirm which your car and state require before you accept a quote

Rule out the sensor first. A check-engine light that says the converter is inefficient is sometimes an oxygen sensor or an upstream fuel or misfire problem, which is far cheaper to fix. A converter that failed will fail again fast if the real cause upstream is not fixed, so the diagnostic is worth paying for before the part.

Theft is why this is a common repair, and a shield is cheap insurance. Converters are stolen for the precious metals inside, cut out in minutes, and certain trucks and hybrids are targeted repeatedly. If yours was stolen, a theft-deterrent shield or cage fitted with the new one costs little against replacing the converter twice.

A cheap converter that is not legal is a false economy. An aftermarket unit that does not meet your state's emissions standard can fail an inspection, throw a light, or wear out fast, meaning you pay again. Match the converter to what your state requires, not just to the cheaper option.

The defaults are ours and are a starting point. The part, the labor, and the diagnostic are yours, and the estimate turns almost entirely on whether your car and state allow an aftermarket converter or force an OEM one.

Frequently asked questions

How much does it cost to replace a catalytic converter?
It depends overwhelmingly on the part. A universal aftermarket converter fitted to an older car is at the low end; a CARB-compliant or OEM direct-fit converter for a modern or hybrid car runs into the thousands, plus labor and a diagnostic. The calculator above adds up your specific quote. The part, not the labor, is where the money is.
Why are catalytic converters so expensive?
Because they contain precious metals, platinum, palladium, and rhodium, that do the actual emissions work, and those metals are costly. That is also why they are stolen. On top of the metal, a converter for a modern car must meet strict emissions standards and often be a direct-fit OEM part, which pushes the price up further.
Can I use an aftermarket catalytic converter?
Often, and it saves a lot, but only where it is legal. California and the states that follow its CARB standards require an approved converter, and some cars have no compliant aftermarket option. Where an aftermarket unit is legal for your car and state, it is a fraction of the OEM price. Check your state's rule before buying the cheap one.
What if my catalytic converter was stolen?
It is a common theft because the converter is quick to cut out and valuable for its metals. Replacing it is the same repair, and it is worth fitting a theft-deterrent shield or cage at the same time, especially on a frequently targeted truck or hybrid, because thieves often return. Your car insurance may cover a stolen converter under comprehensive.

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