How Much Is a Catalytic Converter for a Honda Accord?

Expect to pay roughly $200–$700 for a basic aftermarket catalytic converter for a Honda Accord, $400–$1,500 for a CARB-certified aftermarket unit (required in some states), and $900–$2,500+ for an OEM Honda part; installed totals typically run $600–$3,500+ depending on model year, engine, emissions rules, and labor. Prices vary widely because some Accords use manifold-integrated converters and certain trims (especially V6) have more than one converter.

Typical Price Ranges by Part Type

The cost hinges on whether you choose an aftermarket or OEM part and whether your state requires CARB-certified converters. Below are realistic U.S. price ranges per converter unit as of 2025.

• Aftermarket (Federal/EPA-only): about $200–$700 for most 4-cylinder Accords; quality and longevity vary.
• Aftermarket (CARB-certified): about $400–$1,500; required in California, New York, Colorado, and some localities, typically more durable and emissions-compliant.
• OEM Honda (dealer part): about $900–$2,500+; commonly higher on newer turbo models and V6 trims; best fitment and emissions reliability.

These figures are for the part alone. If your Accord has multiple converters (common on V6 models), costs are per unit and can add up if more than one needs replacing.

Installed Cost and Labor

Total out-the-door pricing includes parts, labor, and incidentals (gaskets, hardware, potential O2 sensors). Here’s what owners typically see at independent shops versus dealers.

• Independent shop total: about $600–$2,200 for a single converter on most 4-cylinder models; manifold-integrated units trend higher.
• Dealer total: about $1,200–$3,500+ per converter, especially for late-model turbo engines or V6 banks.
• Labor time: roughly 1.0–3.5 hours depending on rust, location (underfloor vs manifold-integrated), and access; shop rates commonly $100–$200/hr.

Additional costs may include oxygen sensors ($70–$250 each), new gaskets/hardware ($20–$80), and potential exhaust flange or pipe repairs if corrosion is severe.

What Drives the Cost Up or Down

Several variables explain why two Accord owners can see very different quotes for a catalytic converter replacement.

• Model year and engine: newer turbo 1.5T/2.0T converters and older manifold-integrated designs cost more; V6 models may have multiple converters.
• Emissions certification: CARB states require CARB-certified units, which are pricier than federal-only parts.
• Part choice: OEM Honda offers best fitment and warranty alignment but at a premium; reputable aftermarket brands can be cost-effective.
• Theft and availability: high theft rates can spike demand, leading to backorders or higher OEM prices.
• Regional labor rates: urban and coastal areas typically charge more per hour.
• Rust/corrosion: seized hardware and deteriorated flanges increase labor time and parts needs.

Understanding these factors helps you compare quotes on an apples-to-apples basis and anticipate any add-ons that might appear on your invoice.

OEM vs. Aftermarket: Which Should You Choose?

There isn’t a one-size-fits-all answer; it depends on your budget, location, and how long you plan to keep the car.

• OEM Honda: best for long-term ownership, guaranteed fit/finish, and emissions reliability; highest price.
• CARB-certified aftermarket: required in certain states; balances cost and compliance with generally solid durability from reputable brands.
• Federal-only aftermarket: the most affordable where legal; may have shorter lifespan or fitment compromises on some models.

If you live in a CARB-regulated area, installing a non-CARB converter can fail inspection and cost more in the long run; always confirm your state’s rules before purchasing.

Special Cases to Know

Two scenarios often affect Accord owners: V6 layouts and newer turbo engines.

• V6 Accords (e.g., 2008–2017): commonly use multiple converters (one per bank plus an underfloor unit). Replacing a single bank converter might run $1,200–$2,800 installed; doing multiple units escalates costs quickly.
• Turbo 1.5T/2.0T (2018+): converters are often integrated into the downpipe; OEM parts are typically $1,100–$2,000+ before labor, with dealer totals frequently above $1,800.

If your quote seems unusually high, verify whether it covers one converter or multiple units and whether it includes sensors and hardware.

How to Get an Accurate Quote

To avoid surprises, gather specific vehicle details and ask targeted questions before authorizing work.

1. Provide your VIN and emissions info (sticker under hood) so the shop matches the correct part.
2. Ask if the quote is for OEM, CARB-certified aftermarket, or federal-only aftermarket.
3. Confirm what’s included: gaskets, hardware, O2 sensors, tax, shop fees, and reprogramming if needed.
4. Request labor hours and rate; ask about rust contingencies.
5. Verify warranty terms on both parts and labor (and emissions warranty compliance).

A detailed written estimate helps you compare options fairly and prevents scope creep once the car is on the lift.

Legal and Warranty Notes

Catalytic converters are emissions devices with specific regulations and protections.

• Emissions legality: California, New York, and Colorado require CARB-certified aftermarket converters; check your state DMV or environmental agency for current rules.
• Warranty: Some emissions components have federally mandated warranties on newer vehicles; if your Accord is relatively new and failed emissions-related diagnostics, ask the dealer about coverage.
• Theft insurance: If your converter was stolen, comprehensive insurance often covers replacement (less deductible); OEM parts are commonly approved by insurers.

Staying compliant not only avoids inspection failures but also ensures your Accord operates within designed emissions limits and avoids check-engine light recurrences.

Bottom Line

For a Honda Accord, the catalytic converter part itself commonly costs $200–$700 (federal aftermarket), $400–$1,500 (CARB aftermarket), or $900–$2,500+ (OEM), with installed totals typically $600–$3,500+ depending on model, engine, and location. Confirm your state’s emissions requirements, your car’s exact configuration, and whether you’re replacing one or multiple converters to get an accurate, fully loaded quote.

Summary

A Honda Accord catalytic converter ranges widely in price: budget $200–$700 for federal aftermarket, $400–$1,500 for CARB-certified aftermarket, and $900–$2,500+ for OEM parts, with installed totals usually $600–$3,500+. Costs rise for manifold-integrated units, V6 models with multiple converters, and in CARB states. Always verify emissions rules, part type, what’s included in the quote, and warranty before proceeding.

Is it worth it to replace my catalytic converter?

Yes, replacing a catalytic converter is definitely worth it to maintain your vehicle’s performance, avoid costly engine damage, ensure legal compliance with emissions standards, and prevent potential fines or inability to register your car, especially if it is necessary for your state’s annual smog test. While the replacement can be expensive, the benefits of a properly functioning converter, such as improved fuel efficiency, reduced pollution, and a functioning engine, outweigh the cost and consequences of not replacing it. 
Reasons to Replace a Catalytic Converter

• Legal Compliance: Most US states, including California, require vehicles to have functioning catalytic converters to pass emissions tests and be legally registered and driven on the road. 
• Environmental Protection: Catalytic converters significantly reduce harmful exhaust gases, protecting air quality and preventing respiratory illnesses. 
• Engine Performance: A faulty converter can lead to a significant buildup of exhaust gas, causing a lack of power, poor acceleration, and other engine problems. 
• Fuel Efficiency: A damaged converter can negatively impact your car’s fuel efficiency, costing you more money at the pump. 
• Preventing Further Damage: The buildup of gases from a bad converter can lead to engine damage and other costly repairs if left unaddressed. 
• Vehicle Valuation: A car without a working catalytic converter may be difficult to sell or receive a fair price for. 

When it Might Not Be Worth It

• Cost vs. Value of Vehicle: If the cost of replacement is very high and the vehicle itself has limited remaining value, you might consider whether the investment is financially prudent. 
• Underlying Issues: Before replacing the converter, ensure the underlying reasons for it failing, such as issues with spark plugs, oxygen sensors, or fuel injectors, are resolved to prevent the new converter from failing prematurely. 

Next Steps

1. 1. Verify the Problem: Get a proper diagnosis to confirm the catalytic converter is the issue and not a related problem, like a faulty oxygen sensor. 
2. 2. Consider Your Location: Check your state’s emissions requirements, as California and a few other states mandate the use of specific California Air Resources Board (CARB) compliant converters, which can be more expensive. 
3. 3. Evaluate Vehicle Condition: Assess the overall condition of your car to decide if it’s worth the significant financial investment of a new converter. 

Can a Honda Accord run without a catalytic converter?

What happens if you remove or bypass a catalytic converter? If your catalytic converter has been stolen or you bypass it because it’s been having problems, your vehicle will still work. However, without a converter, your car lets out harmful emissions, including carbon monoxide and nitrogen oxides.

How much is a catalytic converter for a 2010 Honda Accord?

The average price for a 2010 Honda Accord Catalytic Converter at Advance Auto Parts is around $344.94, with a range that starts at $4.99 and goes up to $1,114.99. With 27 options in stock from 6 trusted brands, finding the right fit is easy.

How much does it cost to replace a catalytic converter on a Honda Accord?

Replacing a catalytic converter for a Honda Accord typically costs between $1,500 and $4,500, but this is a broad estimate that can change significantly based on the specific year of your Accord, the parts needed, and your location’s labor rates. For a 2021 model, RepairPal estimates costs from approximately $1,500 to $4,300, with parts being the most expensive component. 
Factors influencing cost: 

• Vehicle Year: Newer or older models can have different costs for the catalytic converter part itself.
• Converter Type: The specific type of catalytic converter your Accord needs will affect the price.
• Labor Costs: These vary by location and the shop’s labor rates.
• Associated Parts: Sometimes, other related parts may need replacement, adding to the total cost.
• Taxes and Fees: These will be added to the final bill and are not included in the estimates.

What to do if you suspect a bad catalytic converter:

• Look for symptoms: A bad converter can cause a rattling noise, sluggish acceleration, reduced fuel economy, and a sulfur smell. 
• Get an inspection: Take your vehicle to a specialist to diagnose the problem, as driving with a bad converter can cause further damage. 
• Get a precise estimate: Use an estimator tool or get quotes from multiple shops to get a more accurate price for your specific Accord model and location.