In general, expect about $1,000 to $2,500 for replacing a single catalytic converter on a 2018 Honda Accord, with higher totals if two converters are involved or if you choose OEM parts. Location, engine variant, and labor rates all push prices up or down.
More detail: The 2018 Accord can use one or two catalytic converters depending on the engine option (1.5-liter turbo vs. 2.0-liter turbo in some trims). Replacement costs hinge on whether you buy aftermarket or OEM components, the complexity of access in the exhaust system, and regional shop rates. Additional work such as changing oxygen sensors or gaskets can also affect the final bill.
Cost ranges and factors
Prices vary widely. Here is a breakdown of typical ranges and what drives them.
- Parts cost (catalytic converter): Aftermarket direct-fit converters commonly cost roughly $300–$800 for a single unit; OEM Honda converters typically run about $900–$1,800 or more for a single converter, depending on the engine and model year.
- Labor cost: Automotive shops generally bill 1.5–3.0 hours for a single-cat replacement, depending on accessibility and vehicle configuration; labor rates vary by region and shop, typically $75–$150 per hour.
- Additional parts and fees: The job may require oxygen sensors, gaskets, clamps, and disposal fees for the old converter; these can add $50–$300 to the total.
- Vehicle configuration: Some 2018 Accords use two catalytic converters; if both must be replaced at once, the total cost roughly doubles for parts and labor, compared with a single-cat replacement.
In practice, you can expect most single-cat replacements to fall in the $700–$2,400 range, with OEM parts pushing toward the higher end; two-cat replacements often run $1,400–$4,800 or more, depending on the factors above.
What to expect during service
The process influences cost and timing. Here is a typical workflow you’ll see when replacing a catalytic converter on this model.
- Diagnosis and confirmation via trouble codes and a basic inspection of exhaust components.
- Removal of the old converter(s), including disconnecting exhaust sections and sensors.
- Installation of the new converter and reattachment of the exhaust, with any required sensor or gasket replacements.
- Functional tests, including a smoke or leak check and a test drive to ensure proper operation.
Expect a few hours of labor, and be prepared for possible sensor replacements or exhaust hardware issues that can extend the job. Some shops may offer a multi-cat replacement package at a discount.
Tips to save money and choose wisely
To balance price, performance, and reliability, consider the following:
- Get multiple quotes and insist on a detailed, line‑by‑line estimate for parts and labor.
- Ask about OEM vs aftermarket parts and whether a direct-fit replacement is available for your engine; ensure the part meets local emissions standards.
- Consider whether both converters truly need replacement now or if one may be addressed later, when feasible and safe.
Choosing the right combination of price, warranty, and long-term reliability is essential for emissions systems, performance, and the resale value of your Honda.
Summary
The catalytic converter replacement cost for a 2018 Honda Accord varies widely. A typical single-converter job ranges from roughly $700 to $2,400, with OEM parts at the higher end of the spectrum, while two converters can push total costs into the $1,400 to $4,800 range or more. Labor rates, regional differences, and the choice between OEM and aftermarket parts are the main price drivers. Always obtain a written estimate and clarify what is included in the price before work begins.