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

Expect to pay roughly $900 to $2,500 for most Honda catalytic converter replacements in the U.S., parts and labor included. Costs can be lower (around $600 to $900) with non-CARB aftermarket parts where legal, and much higher—$2,500 to $5,000+—for V6 models with multiple converters, CARB-compliant parts in California and other CARB states, or when theft or rust adds repairs. Pricing depends on model/year, emissions rules in your state, OEM vs. aftermarket parts, and whether related components (like oxygen sensors) need replacement.

What goes into the price

Replacing a catalytic converter is largely a parts-driven job: converters contain precious metals and can be integrated into the exhaust manifold, increasing cost. Labor typically runs 1 to 3 hours, but corrosion, seized hardware, or theft damage can extend time and add parts like O2 sensors and pipes. Emissions regulations also matter: CARB-compliant parts required in California, New York, Colorado, and Maine usually cost more than standard EPA-compliant aftermarket parts allowed elsewhere.

Typical price ranges by Honda model

The following estimates reflect common out-the-door totals (parts, labor, shop fees, typical taxes) as seen in 2024–2025 across dealer and independent shops. Your VIN, emissions package, and local labor rates can shift these numbers.

• Honda Civic (2006–2021): $900–$2,200 (CARB states: $1,100–$2,500). Many Civics use a manifold-integrated cat that pushes OEM prices higher; aftermarket options can be significantly cheaper where allowed.
• Honda Accord (I4): $1,000–$2,400 (CARB: $1,200–$2,700). Manifold-integrated designs are common; parts cost drives the total.
• Honda Accord (V6): $1,800–$4,000+ (CARB: $2,200–$4,500+). V6 engines may have two primary catalytic converters; replacing both increases cost substantially.
• Honda CR‑V: $1,100–$2,500 (CARB: $1,300–$2,800). Theft-related damage can add O2 sensors and piping.
• Honda Pilot / Odyssey / Ridgeline (V6): $1,600–$3,500+ (CARB: $1,900–$4,000+). Multiple converters or complex exhaust layouts can elevate totals.
• Honda Insight / Accord Hybrid: $900–$2,200 (CARB: $1,100–$2,600). Less commonly targeted than some hybrids but still regulated by strict emissions rules.

These ranges assume a single converter. If your Honda has multiple cats or needs additional exhaust sections, gaskets, or sensors, expect the high end or beyond.

Cost breakdown

Understanding the line items helps explain why estimates vary so widely, even for the same model.

• Parts: $400–$2,200+ each converter. OEM Honda units tend to be pricier; EPA-compliant aftermarket units can be hundreds less; CARB-certified aftermarket units cost more than EPA-only versions.
• Labor: $150–$500+ (1–3 hours typical; more with rust or fabrication). Dealer labor rates are often higher than independent shops.
• Oxygen sensors and hardware: $100–$350 per sensor; $25–$100 for gaskets, clamps, studs. Often needed when sensors are seized or cut during theft.
• Diagnostic fee: $100–$180, sometimes applied to the job if you proceed with repairs.
• Anti-theft shield (optional): $150–$500 installed, depending on design and vehicle.
• Core charge: $50–$200, refundable when the old converter is returned (varies by supplier).

Ask shops to itemize estimates so you can compare parts choices, labor time, and extras like sensors and shields.

Key factors that affect your price

Several variables push the total up or down; knowing them helps you control cost without compromising legality or reliability.

• OEM vs. aftermarket: OEM is often the most expensive but guaranteed to fit and comply. Aftermarket can save money; ensure it’s EPA- or CARB-certified as your state requires.
• Emissions rules: CA, NY, CO, and ME require CARB-certified converters—typically 20–60% pricier than EPA-only parts.
• Number and location of converters: V6 and some AWD models may have two primary converters; manifold-integrated units cost more.
• Rust and age: Corroded exhausts add labor, hardware, and occasionally pipes or flanges.
• Theft damage: Stolen cats often mean cut O2 sensor wires and pipe sections; that can add $200–$800+.
• Shop type and region: Dealer labor rates and big-city shops usually cost more than independents or smaller markets.

If your quote seems unusually high, verify whether the car needs one or multiple converters and whether a CARB part is required in your state.

Warranty and insurance you might have

Before paying out of pocket, check eligibility for coverage—emissions warranties and comprehensive insurance can offset or eliminate the bill.

• Federal emissions warranty: 8 years/80,000 miles in the U.S. for catalytic converters. If you’re within this window, the repair may be covered.
• CARB/PZEV coverage: Some Honda PZEV models sold in CARB states carry extended emissions coverage (up to 15 years/150,000 miles) that can include the catalytic converter; eligibility depends on your exact model and VIN.
• Comprehensive insurance: Typically covers theft and vandalism, minus your deductible. Ask the shop for photos and a detailed estimate for your claim.
• Recall/TSB: While uncommon for converters, check your VIN with a Honda dealer for any active campaigns.

Have your VIN, mileage, and state of registration ready when you call the dealer or insurer; it speeds up coverage decisions.

How to keep costs in check

There are practical ways to get a fair price while complying with emissions laws and preserving reliability.

1. Get 2–3 itemized quotes from reputable independent shops and the dealer; compare parts type (OEM vs CARB/EPA aftermarket), labor hours, and included hardware/sensors.
2. Confirm legal compliance: In CARB states, insist on a CARB-certified converter listed for your exact Honda year/engine. Elsewhere, an EPA-certified aftermarket unit may be acceptable and cheaper.
3. Address root causes: A failing oxygen sensor, misfire, oil burning, or exhaust leak can trigger catalyst codes (P0420/P0430). Fixing these protects your new converter.
4. Ask about warranties: Look for at least 2 years/25,000 miles on the converter body (many offer more) and 12 months/12,000 miles on labor.
5. Consider an anti-theft shield if your area has frequent thefts; it’s cheaper than replacing another converter.

A careful, apples-to-apples comparison can save hundreds without sacrificing emissions compliance or durability.

Legal and practical notes

Emissions components are tightly regulated; cutting corners can fail inspections and cost more later.

• Used catalytic converters: U.S. federal law generally prohibits installing used converters on a different vehicle. Stick to new EPA- or CARB-certified parts as applicable.
• Inspection readiness: After replacement, ensure there are no exhaust leaks and all OBDII monitors run; you may need a short drive cycle before a smog test.
• Documentation: Keep the part label/invoice showing certification (especially in CARB states) in case of inspection questions.

Following the rules avoids check-engine lights, inspection failures, and fines for improper parts.

Turnaround time and what to expect

Most Honda catalytic converter replacements are same-day jobs if the part is in stock: 1–3 hours of labor plus time for cool-down and any rust-related work. Hybrid or multi-cat setups and special-order CARB parts can extend the timeline to 1–3 days.

Bottom line

For most Hondas, budget $900–$2,500 for a catalytic converter replacement, with higher totals for V6 or multi-converter systems and in CARB states. Verify warranty or insurance options first, insist on the correct certified part for your location, and compare itemized quotes to get the best value.

Summary

Replacing a catalytic converter on a Honda typically costs $900–$2,500, rising to $3,500+ on V6 or CARB-compliant applications and when theft or corrosion adds repairs. Parts choice (OEM vs. EPA/CARB aftermarket), emissions rules, and the number of converters are the biggest cost drivers. Check for federal 8-year/80,000-mile or possible CARB/PZEV emissions coverage, consider a theft shield, and compare multiple itemized quotes to control costs while staying legal and reliable.

Can I still drive with a bad catalytic converter?

If the vehicle will run well enough to get you from point A to point B, then yes, it’s safe to drive. But catalytic converters don’t always fail the same way. If the converter has failed or is missing, safety won’t be a factor. But you’ll want to replace the converter as soon as you discover the failure or theft.

Is it worth replacing a catalytic convertor?

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. 

How to cheaply fix a catalytic converter without replacing it?

The cheapest way to address a catalytic converter issue without a full replacement is often to try cleaning it with a specialized cleaner or using a j-pipe (O2 spacer) to temporarily bypass the problem. Catalytic converter cleaners can help remove built-up deposits, potentially restoring some functionality. A j-pipe, installed on the downstream O2 sensor, can trick the car’s computer into thinking the converter is functioning properly by reducing the amount of exhaust the sensor reads. However, these are often considered temporary fixes and may not be suitable for all situations, especially if your state has emissions testing. 
This video explains how to clean a catalytic converter using a cleaner and fuel additives: 1mAuto V Fix YouTube · Jan 21, 2022
1. Catalytic Converter Cleaning:

• Catalytic Converter Cleaners: . Opens in new tabThese are additives you pour into your fuel tank that are designed to dissolve and remove carbon buildup and other deposits within the catalytic converter. 
• Italian Tune-Up: . Opens in new tabThis involves driving the vehicle harder than usual for a period to increase the catalytic converter’s temperature and burn off deposits. 

This video shows how to clean a catalytic converter using an Italian tune-up and fuel additives: 53sMechanic BaseYouTube · Mar 6, 2025
2. J-Pipe/O2 Spacer:

• Function: J-pipes (also known as O2 spacers) are small, curved pipes that are installed between the downstream O2 sensor and the exhaust pipe. 
• How it works: They create a small gap, reducing the amount of exhaust gases reaching the sensor, which can trick the car’s computer into thinking the converter is working efficiently. 
• Limitations: This is generally considered a workaround for emissions testing purposes and is not a permanent fix. 
• Important Note: Installing a j-pipe or O2 sensor spacer is illegal in many areas for road vehicles and may not be effective if the catalytic converter is severely damaged, according to YouTube videos. 

This video demonstrates how to install a j-pipe (O2 sensor spacer) on a car: 51sFlat Rate MechanicYouTube · Dec 8, 2022
3. Other Considerations:

• Check Engine Light: If the catalytic converter is malfunctioning, it can trigger a “check engine” light. While a j-pipe or cleaning can sometimes clear the light temporarily, it’s important to address the underlying issue. 
• Emissions Testing: If your area requires emissions testing, these temporary fixes may not be sufficient to pass. 
• Professional Advice: It’s always recommended to consult with a mechanic for proper diagnosis and repair of any catalytic converter problems. 

How much to replace a catalytic converter on a Honda?

The average cost for a Honda Accord Catalytic Converter Replacement is between $2,039 and $2,734. Labor costs are estimated between $145 and $213 while parts are priced between $1,894 and $2,521. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.