Repair Cost Guide

Catalytic converter replacement cost
for a Kia Optima

Replacing the catalytic converter on a Kia Optima involves removing the old, failed unit and installing a new one, often requiring cutting and welding or replacing a section of the exhaust. The primary cost driver is the part itself, as OEM converters are expensive due to the precious metals inside, while aftermarket options vary widely in price and quality. Labour costs are moderate but can increase significantly if other exhaust components are rusted and difficult to remove.

$950 – $2200
Typical fair price range · USD

Cost breakdown

Parts: ~$500-$1600 / Labour: ~$200-$600

What affects the price

OEM vs. aftermarket/certified universal converter cost
Model year and engine size affecting part availability and price
Extent of rust and corrosion on exhaust bolts and flanges

Can you do it yourself?

Possible with skill — requires proper tools (saw/welder), jack stands, and knowledge of exhaust systems. Professional installation is strongly recommended for proper fit and emissions compliance.

Tips before you pay

Always verify the exact engine size and model year when ordering a replacement converter, as parts differ.
Consider a CARB-compliant or EPA-certified aftermarket converter if required by your state's emissions laws.
Inspect the oxygen sensors and exhaust manifold for damage while the converter is off, as they are common failure points.

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More cost guides

Brake pads replacement — Kia Optima Alternator replacement — Kia Optima Timing belt replacement — Kia Optima

Estimate based on typical U.S. market rates as of July 2026. Actual prices vary by region, shop, and parts quality — always compare against a real quote using our Scam Checker.