Replacing a catalytic converter on a Nissan Maxima typically runs about $1,000 to $2,500 when using OEM parts, with labor and possibly two converters making up much of the cost. Aftermarket options can cut the part price to roughly $150 to $900 per unit, with labor still adding a significant sum. Prices vary by year, engine, and local rates.
What influences the total price
Several factors shape the final bill, including how many catalytic converters the car needs, the parts you choose, and where you get the work done.
- Number of catalytic converters in the exhaust system (some Maxima models have two, others may require replacements for two units in one job).
- Choice of OEM/Nissan parts versus aftermarket or universal catalytic converters.
- Labor rates and the time required for removal, access, and reinstallation.
- Vehicle model year and engine variant (3.5L V6 vs other configurations) which affects part availability and price.
- Shop type and location (dealership/authorized service vs independent shop; prices vary by region).
- Additional work that may be needed if bolts are seized or rusted, or if sensors need replacement.
Because these factors combine in different ways, the final price can swing widely from a ballpark estimate.
Parts options and cost ranges
Below are typical price ranges for common scenarios, separating the cost of parts from labor as a guideline.
- OEM catalytic converters (per unit): generally between about $600 and $2,000, depending on year, model, and whether the cat is a direct-fit part or a more limited production version. If two converters are needed, expect roughly $1,200 to $4,000 for parts alone.
- Aftermarket/direct-fit catalytic converters (per unit): commonly around $150 to $900 per converter, with higher-end or performance-oriented units costing more. Two converters would be about $300 to $1,800 for parts.
- Labor costs: typical shop rates range from $75 to $150 per hour. Replacement can take roughly 1–3 hours per converter, with longer times if access is difficult or if two converters must be replaced, leading to an estimated labor total of about $150–$900 per converter or $300–$1,800 for two.
- Additional costs: gaskets, clamps, O2 sensors if needed, rust removal, and possible welding or exhaust-pipe work can add $50 to $300 or more.
In practice, many owners see a combined Parts + Labor total in the range of a few hundred to several thousand dollars, depending on the exact configuration and choices made.
Cost scenarios: one converter vs two
Because Maxima variants differ in how many catalytic converters they use, here is a rough guide to all-in costs depending on how many units are replaced.
- One catalytic converter replacement (typical single-unit repair): OEM parts total roughly $900–$2,600; aftermarket parts total roughly $300–$1,500, with labor adding $150–$900 for a single unit.
- Two catalytic converters replacement (common in older or dual-cat setups): OEM parts total roughly $1,800–$5,000; aftermarket parts total roughly $600–$3,000, with labor adding about $300–$1,800 depending on access and bolts/sensors.
As always, the final bill depends on number of units, exact part choices, and local labor rates.
How to get an accurate quote
To ensure you get a reliable estimate, gather quotes from at least three shops and provide precise details: model year, engine type, whether you want OEM versus aftermarket parts, and if you know there are two cats or just one. Ask for a written estimate that itemizes parts and labor and clarifies whether sensors or additional exhaust repairs are included.
Practical steps to save
Consider getting quotes for both OEM and aftermarket parts to compare, check whether a muffler shop can do the work efficiently, and ask about any warranties on the parts and workmanship. In some cases, a dealer can provide a longer warranty on OEM parts, but the upfront price may be higher.
Summary
Replacing a catalytic converter on a Nissan Maxima is a mid-to-high cost repair, largely driven by parts choice and how many converters require replacement. OEM parts typically command higher prices than aftermarket options, and labor costs vary with regional rates and the job’s complexity. For most drivers, getting multiple quotes is the best way to secure a fair price, and understanding whether you need one or two converters—and whether you want OEM or aftermarket parts—can help you make an informed choice.