AMVirtuo Catalytic Converter for Nissan Altima 2007-2013 2.5L | Vehicle-Specific Replacement Exhaust Manifold Replacement
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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
| Vehicle | Years | Engine |
| Nissan Altima | 2007-2013 | 2.5L L4 DOHC (Naturally Aspirated & FHEV Hybrid) |
⚠️ 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
| Specification | Details |
| Converter Type | Vehicle-specific design Exhaust Manifold Assembly |
| Shell Material | T409 Stainless Steel |
| Welding | TIG Welded (all seams) |
| Catalyst Coating | Platinum, Palladium, Rhodium |
| Substrate | Ceramic honeycomb |
| O2 Sensor Cover | Removable (for installation flexibility) |
| Emissions Standard | Emissions Notice |
| Fitment | Direct Replacement (bolt-on) |
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)
At AMVirtuo, we want every customer to feel confident when purchasing from us. If something isn’t right, our team will always do our best to help resolve the issue quickly and fairly.
Please review the policy below for details on returns, cancellations, and refunds.
30-Day Return Window
We offer a 30-day return window from the date your order is delivered.
If you are not completely satisfied with your purchase, you may request a return within this period, provided the product meets the return conditions listed below.
Order Cancellation
Orders may be canceled within 24 hours of purchase.
If your cancellation request is received within this timeframe, we will issue a full refund. Refunds are typically processed within 24 hours after confirmation.
If the order has already been processed or shipped after the 24-hour window, cancellation may no longer be possible. In this case, the order may be returned after delivery following our return policy.
Return Conditions
· To be eligible for a return, items must meet the following requirements:
· The return request must be made within 30 days of delivery
· The item must be unused and in new condition
· The product must be returned in its original packaging
· All included hardware, accessories, and components must be returned
Please ensure that returned items are securely packaged. Items damaged during return shipping due to improper packaging may not be eligible for a refund.
Please ensure that returned items are securely packaged. Items damaged during return shipping due to improper packaging may not be eligible for a refund.
Returns Due to Product Quality Issues
If a return is requested due to a product defect or quality issue, please get in touch with our support team and provide:
Your order number
Photos or videos showing the issue
Once our team confirms the issue, AMVirtuo will cover the return shipping cost.
After the returned item is received and inspected, a full refund will be issued. Refunds are typically processed within 48–72 hours after inspection.
Returns for Other Reasons
If a return is requested for reasons such as:
Ordered the wrong product
No longer needed
Changed your mind
Refused delivery
The customer will be responsible for the return shipping cost.
Once the returned item arrives at our warehouse and passes inspection, the refund will be issued. Please allow up to 2 weeks for the return to be processed and the refund to appear.
Installation and Fitment Responsibility
Automotive performance parts, including exhaust headers and engine components, may require professional installation and proper vehicle compatibility verification.
Customers are responsible for ensuring the product is compatible with their vehicle before purchasing.
Products that have been installed, used, or modified may not be eligible for return.
Non-Returnable Items
For safety and quality reasons, the following items may not be eligible for return:
Products that show signs of installation or use
Products that are damaged during installation
Items returned without original packaging or components
Refund Processing
All refunds will be issued to the original payment method used at checkout.
Processing time may vary depending on your payment provider, but refunds are typically completed within a few business days after approval.
How to Start a Return
To request a return, please contact our support team:
Please include:
Your order number
The reason for the return
Photos or videos if applicable
Our support team will guide you through the return process and provide the necessary return instructions.
Our Commitment
At AMVirtuo, we are committed to providing reliable performance parts and excellent customer service.
If you ever have questions or concerns about your order, please reach out to us. Our team will always do our best to help and make things right.