Front Catalytic Converter Compatible with Nissan Altima 2007-2013

Our review of this front catalytic converter for the Nissan Altima 2007-2013 2.5L L4 finds it suited to owners who need a direct replacement that meets federal emissions rules. The single biggest reason to consider this part is its OEM-style construction and U.S. EPA certification, which ensures legal use in states that follow federal standards and a reliable fit for engines requiring part number 674-933. The reviewer found the build materials and straightforward installation notes to be the most practical benefits for routine exhaust repairs.

Key Features

• Vehicle Fitment: Designed specifically for Nissan Altima 2007-2013 2.5L L4 models, offering a close match to the original front catalytic converter for direct replacement.
• EPA Certification: Built to meet U.S. EPA standards so it is legal for use on vehicles operating under federal emission regulations.
• OEM Specification: Manufactured to OEM part number 674-933 specifications to improve fit and reduce installation adjustments.
• Construction: Features a stainless steel body that resists corrosion and supports long-term exposure to exhaust conditions.
• Catalytic Materials: Uses porous ceramic substrate with platinum, rhodium and palladium to increase conversion efficiency and reduce emissions.
• Installation Guidance: Can be bolted to the exhaust manifold and downstream pipe with standard hardware and torque specifications for a secure seal.

Who It's For

This catalytic converter is for Nissan Altima owners (2007 through 2013, 2.5L L4) who need a federal-emissions-compliant front replacement and want a component built to OEM-style specifications. It suits do-it-yourselfers with basic mechanical skill or owners who will have the part installed by a professional shop.

It is not for drivers in states that require CARB-compliant parts, such as California, Colorado, New York or Maine, since this unit is explicitly not CARB-approved. Buyers needing a California Air Resources Board certified converter should look for a CARB-labeled alternative.

Pros & Cons

Pros

• EPA certification ensures compliance with federal emissions laws where applicable.
• Stainless steel body and noble-metal coated ceramic substrate promote durability and effective catalytic conversion.
• Designed to match OEM part number 674-933 for an easier fit and fewer modifications during installation.
• Installation instructions are straightforward, making it practical for experienced DIYers or shops.

Cons

• Not CARB-compliant, so it cannot be legally sold, installed or used in states with stricter emissions rules.
• Fit and performance depend on correct vehicle match; incorrect selection will require return or exchange.

Specifications

Compatible Vehicles	Nissan Altima 2007-2013 2.5L L4
OEM Reference	Part number 674-933
Certification	U.S. EPA compliant (federal only)
Body Material	Stainless steel
Substrate	Porous ceramic with Pt, Rh, Pd noble metals
Installation	Connect to exhaust manifold and downstream pipe; tighten bolts to specified torque

Our Verdict

This front catalytic converter is a practical, cost-conscious replacement for Nissan Altima 2007-2013 2.5L L4 owners who require EPA-compliant parts built to OEM-style specifications. It offers durable materials and proven catalytic metals for effective emissions control, but buyers in CARB states must choose a certified alternative. For anyone operating under federal emission rules, it represents sensible value when properly matched to the vehicle.

Frequently Asked Questions

Is this converter legal for my state?
This unit is U.S. EPA certified for federal emissions only and is not CARB-approved; it cannot be legally used in states that require CARB certification.

Will this fit my Altima?
It is designed for Nissan Altima 2007-2013 with the 2.5L L4 engine and references OEM part number 674-933; verify your model and part number before purchasing.

Can I install it myself?
It can be bolted into place and tightened to specified torque but professional installation is recommended to ensure a proper seal and vehicle operation.