Repair Cost Guide

Catalytic converter replacement cost
for a Nissan Altima

The catalytic converter replacement on a Nissan Altima involves removing the old converter and installing a new one, which can be a complex process due to its location and the need for proper exhaust system sealing. The cost is typically driven by the type of catalytic converter used, whether it's OEM or aftermarket, and the labour rates of the mechanic or repair shop. Additionally, the model year and engine type of the Altima can also impact the price.

$550 – $1050
Typical fair price range · USD

Cost breakdown

Parts: ~$400 / Labour: ~$250

What affects the price

Type of catalytic converter used (OEM vs aftermarket)
Labour rates of the mechanic or repair shop
Model year and engine type of the Nissan Altima

Can you do it yourself?

Possible with skill — requires specialized tools and experience with exhaust system repairs, but can be done with proper guidance and precautions

Tips before you pay

Use a high-quality aftermarket catalytic converter to save money without compromising performance
Check for any warranty or recall notices related to the catalytic converter on your Altima
Consider having the oxygen sensor and exhaust system inspected at the same time to prevent future issues

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More cost guides

Brake pads replacement — Nissan Altima Alternator replacement — Nissan Altima Timing belt replacement — Nissan Altima

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.