Does the AutoShack EMCC774935 Exhaust Manifold Catalytic Converter fit a 2012 Nissan Altima?

Yes, the AutoShack EMCC774935 Nissan Altima Converter is compatible with a 2012 Nissan Altima 2.5L.

The Nissan Altima Converter is designed for the 2.5L engine variant and matches the specific OE part numbers 14002-JA01E, 14002-JA02E, 14002-JA91E, 140E2JA02E, 140E2JA03E, 140E2JA92E, 674933, and 674-933. This part is a direct-fit component, meaning it is engineered to bolt directly onto the existing exhaust system without requiring custom welding or fabrication. We selected this specific converter for our comparison because it includes the necessary gaskets and hardware for a complete installation. Because exhaust manifold converters are bolted directly to the engine block, verifying the exact manifold geometry is critical to prevent port mismatches where the tubes fail to align with the cylinder ports. This unit is EPA OBDII Approved, which helps ensure the flow rate does not trigger a “Check Engine” light, though it is not certified for sale in California, Colorado, New York, or Maine.

What to Check Before Buying the Nissan Altima Converter

Before purchasing this exhaust manifold converter—a metal pipe and catalytic unit that replaces the factory manifold to reduce emissions—verify these details to ensure a proper fit.

• Verify your state’s emissions laws, as this part is not legal for sale in California, Colorado, New York, or Maine.
• Check for any aftermarket modifications to the exhaust headers that might interfere with the 4-bolt connection.
• Ensure there is sufficient clearance for the unit to sit without interfering with the vehicle’s frame or subframe.

Comparing the Nissan Altima Converter to Other Options

The Nissan Altima Converter serves as a direct-fit replacement for owners seeking to restore or maintain factory emissions standards. If you require a high-flow converter for significant performance gains or are looking for a unit that meets specific California-only emissions standards, you should look at alternative options. Some buyers may also prefer an OEM cast iron manifold for maximum thermal mass, whereas this unit provides a standard aftermarket solution for those needing a functional, direct-fit replacement.

If you own a 2012 Nissan Altima 2.5L and need a direct-fit replacement that includes all necessary mounting hardware, the AutoShack EMCC774935 is the appropriate choice for your vehicle.

Owners of different models can also view our comparison of Jeep Wrangler exhaust manifold catalytic converters.

AutoShack EMCC774935 Nissan Altima Exhaust Manifold Converter

3.9/5 from 18 buyer ratings

$132.23 price checked August 2026

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