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Catalytic Converter for 2003 Nissan Altima

We have 68 Items In-stock. Select your vehicle's Submodel to continue.

Evan Fischer 48-State Legal (No CA and NY) Catalytic Converter

This Evan Fischer 48-State Legal (No CA and NY) Direct Fit Catalytic Converter is manufactured from high quality and durable stainless steel catalytic case, 16-gauge aluminized steel tubes, and heat shield for long lasting durability and better protection for your vehicle. It also features honeycomb catalyst that has maximum surface area flow. OBD-II and EPA compliant catalytic converter; It is a high quality aftermarket replacement for the OEM catalytic converter. Designed for easy installation - it requires no cutting or welding!

Evan Fischer also offers comprehensive manifold converter assemblies for newer vehicle models!

  • OBD-II And EPA compliant catalytic converter
  • Requires NO cutting or welding
  • Honeycomb catalyst with maximum surface area flow
  • Covered by 5-year or 50,000-mile limited warranty
  • Not legal for sale in California and New York; Cannot be shipped to CA or NY addresses
Evan Fischer Catalytic Converter, Front, Manifold Converter, 48-State Legal (Cannot Ship To CA Or NY)
$341.97 List Price $403.52 Save $61.55 Availability: In Stock
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  • SKU#: REPN960309
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Dimensions: 19.75 in. overall length
  • Warranty: 5-year or 50,000-mile limited warranty
see more Fits the following 2003 Nissan Altima submodels:
  • 4 Cyl 2.5L | S, SL, Base
Evan Fischer Catalytic Converter, Rear, Traditional Converter, 48-State Legal (Cannot Ship To CA Or NY)
$246.76 List Price $291.18 Save $44.42 Availability: In Stock
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  • SKU#: REPN960327
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Dimensions: 39.25 in. overall length
  • Inlet Type: Single (3-bolt welded flange)
  • Outlet Type: Single (2-bolt welded flange)
  • Warranty: 5-year or 50,000-mile limited warranty
see more Fits the following 2003 Nissan Altima submodels:
  • 6 Cyl 3.5L | Base, SE, SL, S
Evan Fischer Catalytic Converter, Firewall Side, Traditional Converter, 48-State Legal (Cannot Ship To CA Or NY)
$185.86 List Price $219.31 Save $33.45 Availability: In Stock
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  • SKU#: REPN960325
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Dimensions: 14 in. overall length
  • Inlet Type: Single (4-bolt welded flange)
  • Outlet Type: Single (3-bolt welded flange)
  • Oxygen Sensor Ports: 1
  • Warranty: 5-year or 50,000-mile limited warranty
see more Fits the following 2003 Nissan Altima submodels:
  • 6 Cyl 3.5L | Base, SE, SL, S

Eastern 49-state legal Universal Catalytic Converter

Eastern 49-State Legal Universal Catalytic Converters

  • NANO technology for better converter efficiency
  • Advanced materials design for optimum engine output and catalytic efficiency
  • Complete range of inlet and outlet diameters
  • Non-directional for ease of installation
Backed by 3 decades of product expertise, Eastern continues to invest in state-of-the-art production equipment to guarantee only the best for their customers - making them ready for the future.

Note:
  • 49-state legal; Not legal in California and other states adopting California Emissions Standards; Not for sale or use in California and other states adopting California Emissions Standards; Cannot be shipped to California and such states
Eastern Catalytic Converter, Eastern ECO II, Rear, Traditional Converter
$67.29 List Price $79.40 Save $12.11 Availability: In Stock
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  • SKU#: EAST83165
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Dimensions: 10 in. L x 6 in. W x 4.25 in. H, 14 in. overall length
  • Replaces OE Number: F42Z5E212C
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
see more Fits the following 2003 Nissan Altima submodels:
  • 4 Cyl 2.5L | S, SL, Base
Rating: (see review/s)

"quality of product great price and fast shipping!!!" posted by: ray on June 25, 2014 view all 5 reviews

Eastern Catalytic Converter, Eastern Standard, Rear, Traditional Converter
$40.82 List Price $48.17 Save $7.35 Availability: In Stock
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  • SKU#: EAST70258
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Dimensions: 5 x 5 x 10 in. body, 14 in. overall length
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
see more Fits the following 2003 Nissan Altima submodels:
  • 6 Cyl 3.5L | Base, SE, SL, S
Rating: (see review/s)

"great price-fit like a glove- works very well-and the first time i bought a part for my BMW 740 il that i did not feel like i had been attact from behind and hi jacked.I have found a new home for my parts now." posted by: g.l. on June 20, 2009

49-state legal Eastern Direct Fit Catalytic Converter

Eastern 49-State Legal Direct Fit Catalytic Converters

  • NANO technology for better converter efficiency
  • Advanced materials design for optimum engine output and catalytic efficiency
  • Complete range of inlet and outlet diameters
Backed by 3 decades of product expertise, Eastern continues to invest in state-of-the-art production equipment to guarantee only the best for their customers - making them ready for the future.

Note:
  • 49-state legal; Not legal in California and other states adopting California Emissions Standards; Not for sale or use in California and other states adopting California Emissions Standards; Cannot be shipped to California and such states
Eastern Catalytic Converter, Eastern ECO III, Front, Manifold Converter
$295.38 List Price $348.55 Save $53.17 Availability: In Stock
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  • SKU#: EAST40810
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
see more Fits the following 2003 Nissan Altima submodels:
  • 4 Cyl 2.5L | S, SL, Base
Eastern Catalytic Converter, Eastern ECO II, Front, Passenger Side, Traditional Converter
$200.44 List Price $236.52 Save $36.08 Availability: In Stock
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  • SKU#: EAST40552
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Replaces OE Number: 208A27Y10A
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
see more Fits the following 2003 Nissan Altima submodels:
  • 6 Cyl 3.5L | Base, SE, SL, S
Rating: (see review/s)

"Good! This is working perfect!. I think this is a part that you can use in instead of pay for a expensive one." posted by: Rulas on April 14, 2014

Eastern Catalytic Converter, Eastern ECO III, Front, Driver Side, Traditional Converter
$249.47 List Price $294.37 Save $44.90 Availability: In Stock
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  • SKU#: EAST40420
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Dimensions: 13 in. overall length
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
see more Fits the following 2003 Nissan Altima submodels:
  • 6 Cyl 3.5L | Base, SE, SL, S

Magnaflow 49-State Legal Semi-Universal Catalytic Converter

  • Not legal for use in California or in states adopting the California emissions standards
  • Semi-universal design – cut out your old catalytic converter and weld in the new one
  • Stainless Steel Construction
  • Legendary Magnaflow quality, power, and sound
  • Ceramic, honeycomb catalyst designed for maximum flow and surface area

When you want the best, you want Magnaflow!  These 49-State Legal semi-universal catalytic converters have a catalyst specifically designed for your vehicle – just cut out your old catalytic converter and weld in the new one.  Engineered to cut emissions and improve performance.

Magnaflow Catalytic Converter, Magnaflow 49-State Semi-Universal, Rear, Traditional Converter
$100.27 List Price $129.77 Save $29.50 Availability: In Stock
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  • SKU#: M6699205HM
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Dimensions: 9 in. L x 5.13 in. W, 13 in. overall length
  • Notes: Slip fit Inlet and outlet attachment type
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
see more Fits the following 2003 Nissan Altima submodels:
  • 4 Cyl 2.5L | S, SL, Base
Rating: (see review/s)

"After instalation my car ran great the parts arrived when they said they would." posted by: Hmc on July 16, 2012

Magnaflow Catalytic Converter, Magnaflow 49-State Semi-Universal, Traditional Converter, 48-State Legal (Cannot Ship To CA Or NY)
$110.08 List Price $142.46 Save $32.38 Availability: In Stock
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  • SKU#: M6699235HM
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Dimensions: 9 in. L x 5.13 in. W, 13 in. overall length
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
see more Fits the following 2003 Nissan Altima submodels:
  • 6 Cyl 3.5L | Base, S, SE, SL

Magnaflow California Legal Semi-Universal Catalytic Converter

  • 50-State/California Legal
  • Semi-universal design – cut out your old catalytic converter and weld in the new one
  • Stainless Steel Construction
  • Legendary Magnaflow quality, power, and sound
  • Ceramic, honeycomb catalyst designed for maximum flow and surface area

When you want the best, you want Magnaflow!  These semi-universal 50-State Legal catalytic converters have a catalyst specifically designed for your vehicle – just cut out your old catalytic converter and weld in the new one.  Engineered to cut emissions and improve performance.

Magnaflow Catalytic Converter, Magnaflow 50-State Semi-Universal, Rear, Traditional Converter
$169.21 List Price $218.98 Save $49.77 Availability: In Stock
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  • SKU#: M66441304
  • Emissions: 50-State Legal
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Dimensions: 13 in. overall length
  • EO Number: D-193-96
  • Notes: Inlet/Outlet Size : 2in. I.D.
  • Warranty: Magnaflow 5 year / 50,000 Mile Warranty
see more Fits the following 2003 Nissan Altima submodels:
  • 6 Cyl 3.5L | Base, S, SE, SL
Magnaflow Catalytic Converter, Magnaflow 50-State Semi-Universal, Rear, Traditional Converter
$165.85 List Price $214.63 Save $48.78 Availability: In Stock
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  • SKU#: M6657105
  • Emissions: 50-State Legal
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Dimensions: 13 in. overall length
  • EO Number: D-193-107, D-193-99
  • Notes: Inlet/Outlet Size : 2.25in. I.D.
  • Warranty: Magnaflow 5 year / 50,000 Mile Warranty
see more Fits the following 2003 Nissan Altima submodels:
  • 4 Cyl 2.5L | Base, S, SL
Magnaflow Catalytic Converter, Magnaflow 50-State Semi-Universal, Rear, Traditional Converter
$169.21 List Price $218.98 Save $49.77 Availability: In Stock
  • Free Ground Shipping
  • Low Price Guarantee
(

more

)
  • SKU#: M66441305
  • Emissions: 50-State Legal
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Dimensions: 13 in. overall length
  • EO Number: D-193-96
  • Notes: Inlet/Outlet Size : 2.25in. I.D.
  • Warranty: Magnaflow 5 year / 50,000 Mile Warranty
see more Fits the following 2003 Nissan Altima submodels:
  • 6 Cyl 3.5L | Base, S, SE, SL

More results for 2003 Nissan Altima Catalytic Converter

MAGNAFLOW 49-STATE LEGAL DIRECT FIT CATALYTIC CONVERTER
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  • Easy bolt-on Installation with no cutting, welding or bending required
  • Stainless Steel Construction
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MAGNAFLOW OEM GRADE (49-STATE LEGAL) SEMI-UNIVERSAL CATALYTIC CONVERTER
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MAGNAFLOW CALIFORNIA LEGAL DIRECT-FIT CATALYTIC CONVERTERS
  • California/50-State Legal
  • Easy bolt-on Installation with no cutting, welding or bending required
  • Stainless Steel Construction
  • Legendary Magnaflow quality, power, and sound
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MAGNAFLOW OEM GRADE (49-STATE LEGAL) DIRECT FIT CATALYTIC CONVERTER
  • Not legal for use in California or in states adopting the California emissions standards
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DAVICO 49-STATE LEGAL - NO CA SHIPMENTS CATALYTIC CONVERTER

Davico Catalytic Converter

When it concerns choosing a solid brand name for your engine/exhaust system's catalytic converter, turn to Davico. Davico's line of original equipment quality replacement... (see more)

CATCO CATALYTIC CONVERTER (49-STATE LEGAL - NO CA SHIPMENTS)

Catco catalytic converters are designed with 409 stainless steel pipes and shell that guarantee the customers of durability and longer life.

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WALKER 49-STATE LEGAL - NO CA SHIPMENTS CATALYTIC CONVERTER

Walker catalytic converters feature OE style design and fit, thicker OE-quality flanges, oxygen sensor fittings, heat-shielded pipe, and structural brace for enhanced strength and... (see more)

WALKER CATALYTIC CONVERTER 49-STATE LEGAL

Walker catalytic converters feature OE style design and fit, thicker OE-quality flanges, oxygen sensor fittings, heat-shielded pipe, and structural brace for enhanced strength and durability.

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FLOWMASTER 50-STATE LEGAL SEMI-UNIVERSAL CATALYTIC CONVERTER

FLOWMASTER – 50 STATE LEGAL SEMI-UNIVERSAL CATALYTIC CONVERTER

Failed the smog test because of a malfunctioning stock catalytic converter that has come to the end of its life? Don’t panic and send... (see more)

PACESETTER PERFORMANCE - CATALYTIC CONVERTERS
PACESETTER - CATALYTIC CONVERTERS

Replace your sub-par stock converter with a higher performing catalytic converter by Pacesetter Performance. Their converters are fabricated from the finest... (see more)