AMVirtuo Catalytic Converter for Nissan Altima 2007-2013 2.5L | Vehicle-Specific Replacement Exhaust Manifold Replacement

Key Features

Precision Fitment for Altima 2.5L (2007-2013)

This Nissan Altima catalytic converter is engineered as a direct replacement for the factory exhaust manifold assembly on 2007-2013 Altima models with the 2.5L QR25DE engine. Covers all sub-models — S, SV, SL, and SE — with both naturally aspirated and full hybrid variants.

Eliminates P0420 Check Engine Light

The most common failure on high-mileage Altima 2.5L engines is catalyst efficiency degradation. This replacement resolves the P0420 "Catalyst Efficiency Below Threshold" code by restoring proper three-way catalytic conversion, clearing the check engine light and smoothing out rough idling.

T409 Stainless Steel Shell with TIG Welding

The outer shell uses T409 stainless steel for superior corrosion and high-temperature resistance. Every joint is TIG-welded for crack-free durability, and the removable oxygen sensor cover provides added installation flexibility around the O2 sensor location.

Precious Metal Catalyst Coating

The internal substrate is coated with a uniform layer of platinum, palladium, and rhodium — the three precious metals essential for efficient catalytic conversion of HC, CO, and NOx emissions. Consistent coating coverage maximises conversion performance and extends service life.

Emissions Notice

Intended for federal-use applications where permitted. Not for vehicles registered in CA, ME, CO, or NY. Verify local emissions and inspection requirements before purchase. Cannot be sold for vehicles registered in California, Colorado, New York, or Maine. Confirm your local registration rules before purchasing.

Description

The Nissan Altima 2.5L is one of the best-selling midsize sedans in the U.S., and high-mileage examples commonly develop catalytic converter issues. If your 2007-2013 Altima is showing a P0420 code, running rough, or failing emissions, this Vehicle-specific design catalytic converter may help when the converter is confirmed as the failed component without the dealership markup.

This unit replaces the entire factory exhaust manifold converter assembly. The stainless steel shell holds up to daily driving and under-hood heat cycling far better than the original, and the TIG-welded seams eliminate the cracking problems that plague OE converters as they age. The removable O2 sensor cover simplifies installation, especially in the tight engine bay of the Altima.

Everything you need is in the box — the converter assembly, exhaust manifold gasket, and mounting hardware. No special tools beyond a standard socket set are required, though professional installation is always recommended.

Vehicle Fitment

⚠️ Important Fitment Notes

Engine: Fits 2.5L (2500cc / 152Cu. in.) L4 DOHC engines only — both naturally aspirated and Full Hybrid EV-Gas (FHEV) variants.

Not Compatible With: 3.5L V6 Altima models. This converter is designed exclusively for the QR25DE 2.5L four-cylinder.

OE Reference Numbers: 674-933, 140E2-ZX31E, 140E2-JA02E, 14002-JA91E, 12498616.

Emissions Compliance: Emissions Notice. Not legal for vehicles registered in CA, CO, NY, or ME.

Technical Specifications

Installation Notes

This converter is designed as a Vehicle-Specific Replacement Design, but the Altima engine bay has limited clearance. Professional installation is recommended:

• Pre-Installation Check: Inspect your exhaust system for leaks, check spark plugs and engine oil condition, and verify exhaust system backpressure before replacing the converter.
• O2 Sensor Inspection: If you're getting a P0420 code, test your upstream and downstream O2 sensors first. A bad O2 sensor can mimic converter failure symptoms.
• Heat Shield Note: The factory heat shield may need slight modification to fit the replacement unit.
• Torque Specifications: Follow Nissan's factory torque specs for exhaust manifold bolts. Uneven torque can cause leaks at the gasket surface.
• Code Clearing: After installation, clear the P0420 code with an OBD-II scanner. The catalyst readiness monitor will need 3-5 drive cycles to complete.

Pro Tip: When installing the new converter, apply a thin bead of high-temperature copper silicone sealant to both sides of the exhaust manifold gasket. This adds an extra layer of insurance against leaks at the cylinder head connection.

What's Included

• 1x Catalytic Converter Assembly (with integrated exhaust manifold)
• 1x Exhaust Manifold Gasket
• 1x Set of Mounting Accessories (bolts, hardware)