Finish Selecting Your Vehicle

Choose your Submodel for your 2003 Nissan Altima

  • Base
  • S
  • SE
  • SL

Shop By Brand

The Following brands are available based on your search.

  • Bosal
    Bosal
  • Davico Converters
    Davico Converters
  • Eastern Catalytic
    Eastern Catalytic
  • Magnaflow
    Magnaflow
  • PaceSetter
    PaceSetter
  • Walker
    Walker

Showing Products For 2003 Nissan Altima Catalytic Converter

Below are all the different brands and applications for 2003 Nissan Altima Catalytic Converter

Showing 1 - 10 of 43 Products for Catalytic Converter.

Refine Your Search

Bosal
2003 Nissan Altima Catalytic Converter - Front Forward 6 Cyl 3.5L Bosal - Bosal Federal Direct-Fit Standard Load OBDII Catalytic Converter

P311-30BD3AA    099-1430  New

Qty:
331.41
Bosal Catalytic Converter  Front Forward
  • Catalytic Converter
  • Radiator Side Not Legal For Sale In California Not Legal In NY For Vehicles With California Emissions.
  • Catalytic Converter
  • Bosal Federal Direct-Fit Standard Load OBDII Catalytic Converter
  • Product Attributes:
    • Title: Standard Load Direct-fit
Brand: Bosal
Position: Front Forward
Additional Fitment Information:
Vehicle Submodel Region Position Block Engine CID CC
2003 - Nissan Altima SL Canada Front Forward V 6 Cyl 3.5L - 3498
Magnaflow
2003 Nissan Altima Catalytic Converter 4 Cyl 2.5L Magnaflow - Universal HM Grade Federal (Excludes CA)

P311-32D872E    99205HM  New

Qty:
95.06
Magnaflow Catalytic Converter
  • Universal Catalytic Converter - 2.25in.
  • ; Cutting and Welding Required During Installation
  • Universal Catalytic Converter - 2.25in.
  • Universal HM Grade Federal (Excludes CA)
  • Product Attributes:
    • Air Tube Adaptable: No
    • Body Height: 4.375
    • Body Length: 9
    • Body Shape: Round
    • Body Type: Clam Shell
    • Body Width: 4.375
    • Heat Shield Attached: Yes
    • Heat Shield Included: Yes
    • Heat Shield Material: Aluminized Steel
    • Inlet Attachment: Weld-on
    • Inlet Diameter: 2.25
    • Inlet Orientation: Straight
    • Inlet Quantity: 1
    • Outlet Attachment: Weld-on
    • Outlet Diameter: 2.25
    • Outlet Orientation: Straight
    • Outlet Quantity: 1
    • Overall Length: 13
    • Sensor Port Count: 0
    • Series: Hm Grade
    • Substrate Material: Ceramic
    • Subtitle: Federal / Epa Compliant
    • Title: Hm Grade Universal
    • Type: Universal
Brand: Magnaflow
Additional Fitment Information:
Vehicle Block Engine CID CC
2003 - Nissan Altima L 4 Cyl 2.5L 152 2488
Bosal
2003 Nissan Altima Catalytic Converter 4 Cyl 2.5L Bosal - BRExhaust Federal Direct-Fit Standard Load OBDII Catalytic Converter

P311-3E9D468    099-1401  New

Qty:
303.95
Bosal Catalytic Converter
  • Direct-Fit Catalytic Converter
  • Direct-Fit Catalytic Converter
  • BRExhaust Federal Direct-Fit Standard Load OBDII Catalytic Converter
  • Product Attributes:
    • Air Tube Adaptable: No
    • Converter Quantity: 1
    • Inlet Attachment: Bolt-on
    • Main Piping Diameter: 2.25
    • Mounting Hardware Included: Yes
    • Outlet Attachment: Bolt-on
    • Overall Length: 41
    • Substrate Material: Ceramic
    • Subtitle: Federal / Epa Compliant
    • Title: Standard Load Direct-fit
    • Type: Direct-fit
Brand: Bosal
Additional Fitment Information:
Vehicle Block Engine CID CC
2003 - Nissan Altima L 4 Cyl 2.5L 152 2488
Eastern Catalytic
2003 Nissan Altima Catalytic Converter - Rear 4 Cyl 2.5L Eastern Catalytic - UNIVERSAL

P311-144B095    83165  New

Qty:
163.31
Eastern Catalytic Catalytic Converter  Rear
  • Federal / EPA Semi-Universal Converter - ECO II
  • ; Undercar Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with California Emissions)
  • UNIVERSAL
  • Product Attributes:
    • Air Tube Qty: None
    • Body Length (IN): 10"
    • Catalyst Type: Eco Ii
    • Inlet Gasket Qty: None
    • Inlet Hardware: None
    • Inlet Type A: 2.25" Id
    • O2 Sensor Ports: None
    • Outlet Gasket Qty: None
    • Outlet Hardware: None
    • Outlet Type A: 2.25" Id
    • Shape: Oval
    • Test Weight: 5.9 / 6000
    • Type: Federal / Epa Semi-universal
  • Proprietary ECO II NANO substrate chemistry is designed to be effective on most complex or second-generation on board diagnostics (OBD II) systems and yields highly efficient loadings for lower cost and better converter efficiency. Latest advanced-manufacturing technology, including automated workstations, spinner welding equipment, and high-speed production lines ensures that all converters are built to exact OE dimensions and fitment. This technology helps to maintain industry-leading efficiency, productivity, and competitive prices.
Brand: Eastern Catalytic
Position: Rear
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2003 - Nissan Altima Rear L 4 Cyl 2.5L 152 2488
Eastern Catalytic
2003 Nissan Altima Catalytic Converter - Rear 6 Cyl 3.5L Eastern Catalytic - UNIVERSAL

P311-278499A    70258  New

Qty:
130.46
Eastern Catalytic Catalytic Converter  Rear
  • Federal / EPA Semi-Universal Converter - Standard
  • ; Undercar Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with California Emissions)
  • UNIVERSAL
  • Product Attributes:
    • Air Tube Qty: None
    • Body Length (IN): 10"
    • Catalyst Type: Standard
    • Inlet Gasket Qty: None
    • Inlet Hardware: None
    • Inlet Type A: 2.25" Id
    • O2 Sensor Ports: None
    • Outlet Gasket Qty: None
    • Outlet Hardware: None
    • Outlet Type A: 2.25" Id
    • Shape: Round
    • Test Weight: 3.8 / 4250
    • Type: Federal / Epa Semi-universal
  • Latest advanced-manufacturing technology, including automated workstations, spinner welding equipment, and high-speed production lines ensures that all converters are built to exact OE dimensions and fitment. This technology also helps to maintain industry-leading efficiency, productivity, and competitive prices. The proprietary NANO substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency.
Brand: Eastern Catalytic
Position: Rear
Additional Fitment Information:
Vehicle Transmission Position Block Engine CID CC
2003 - Nissan Altima Automatic Rear V 6 Cyl 3.5L - 3498
Eastern Catalytic
2003 Nissan Altima Catalytic Converter - Front Right 6 Cyl 3.5L Eastern Catalytic - DIRECT FIT

P311-5ECD377    40552  New

Qty:
257.40
Eastern Catalytic Catalytic Converter  Front Right
  • Federal / EPA Direct-fit Converter Assembly
  • ; Firewall Side; Precat Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with California Emissions)
  • DIRECT FIT
  • Product Attributes:
    • Catalyst Type: Eco Iii
    • Inlet Gasket Qty: 1
    • Inlet Hardware: None
    • Inlet Type A: 4 Bolt Welded
    • O2 Sensor Ports: 1
    • Outlet Gasket Qty: 1
    • Outlet Hardware: None
    • Outlet Type A: 3 Bolt Welded
    • Type: Federal / Epa Direct-fit Undercar
  • Latest advanced-manufacturing technology, including automated workstations, spinner welding equipment, and high-speed production lines ensures that all converters are built to exact OE dimensions and fitment. This technology also helps to maintain industry-leading efficiency, productivity, and competitive prices. The proprietary NANO substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency.
Brand: Eastern Catalytic
Position: Front Right
Additional Fitment Information:
Vehicle Transmission Trans. Speed Position Block Engine CID CC
2003 - Nissan Altima Automatic 4 Front Right V 6 Cyl 3.5L - 3498
Eastern Catalytic
2003 Nissan Altima Catalytic Converter - Front Left 6 Cyl 3.5L Eastern Catalytic - DIRECT FIT

P311-21FFB9F    40420  New

Qty:
237.84
Eastern Catalytic Catalytic Converter  Front Left
  • Federal / EPA Direct-fit Converter Assembly
  • ; Radiator Side; Precat Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with California Emissions)
  • DIRECT FIT
  • Product Attributes:
    • Catalyst Type: Eco Iii
    • Inlet Gasket Qty: None
    • Inlet Hardware: None
    • Inlet Type A: 6 Bolt Welded
    • O2 Sensor Ports: 1
    • Outlet Gasket Qty: 1
    • Outlet Hardware: Yes
    • Outlet Type A: 3 Bolt Welded
    • Type: Federal / Epa Direct-fit Pre-cat
  • Latest advanced-manufacturing technology, including automated workstations, spinner welding equipment, and high-speed production lines ensures that all converters are built to exact OE dimensions and fitment. This technology also helps to maintain industry-leading efficiency, productivity, and competitive prices. The proprietary NANO substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency.
Brand: Eastern Catalytic
Position: Front Left
Additional Fitment Information:
Vehicle Transmission Trans. Speed Position Block Engine CID CC
2003 - Nissan Altima Automatic 4 Front Left V 6 Cyl 3.5L - 3498
Eastern Catalytic
2003 Nissan Altima Catalytic Converter - Rear 4 Cyl 2.5L Eastern Catalytic - DIRECT FIT

P311-587CA0A    40514  New

Qty:
263.12
Eastern Catalytic Catalytic Converter  Rear
  • Federal / EPA Direct-fit Converter Assembly
  • ; Undercar Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with California Emissions)
  • DIRECT FIT
  • Product Attributes:
    • Catalyst Type: Standard
    • Inlet Gasket Qty: None
    • Inlet Hardware: None
    • Inlet Type A: 2 Bolt Welded
    • O2 Sensor Ports: 1
    • Outlet Gasket Qty: 1
    • Outlet Hardware: None
    • Outlet Type A: 2 Bolt Welded
    • Type: Federal / Epa Direct-fit Undercar
  • Latest advanced-manufacturing technology, including automated workstations, spinner welding equipment, and high-speed production lines ensures that all converters are built to exact OE dimensions and fitment. This technology also helps to maintain industry-leading efficiency, productivity, and competitive prices. The proprietary NANO substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency.
Brand: Eastern Catalytic
Position: Rear
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2003 - Nissan Altima Rear L 4 Cyl 2.5L 152 2488
Walker
2003 Nissan Altima Catalytic Converter - Center 6 Cyl 3.5L Walker - Walker EPA Ultra Direct Fit Converter

P311-1B1CBEC    16438  New

Qty:
346.26
Walker Catalytic Converter  Center
  • Federal/EPA converters are not legal for sale in the state of California. Restrictions may apply in other states. Consult your state‚Äôs regulation pertaining to aftermarket replacement converters prior to installation; Additional Parts Needed: 31739, 31334 Exhaust Gasket is Recommended To 11/02 Fits Fed. & Calif. Emiss. Models.
  • Walker EPA Ultra Direct Fit Converter
  • Product Attributes:
    • Air Tube: No
    • Body Shape: Round
    • California Air Resource Board (CARB) Certified: No
    • Converter Quantity: 1
    • Fitment: Direct Fit
    • Inlet 1 Type: 4 Bolt Welded Flange
    • Inlet Connection Type: 4 Bolt Welded Flange
    • Inlet Quantity: 1
    • Max Year Covered: 2009
    • Min Year Covered: 2002
    • Most Popular Make / Model:
      • Nissan Altima
      • Nissan Maxima
    • Most Popular Year: 2003
    • Outlet 1 Type: 4 Bolt Welded Flange
    • Outlet Connection Type: 3 Bolt Welded Flange
    • Outlet Quantity: 1
    • Overall Length:
      • 13.000
      • 14.750
    • Oxygen sensor location: Post Catalyst
    • Product Grade: Economy
    • Substrate Material: Ceramic
    • Total Part VIO:
      • 278644
      • 436962
Brand: Walker
Position: Center
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2003 - Nissan Altima Center V 6 Cyl 3.5L - 3498
Walker
2003 Nissan Altima Catalytic Converter - Center 6 Cyl 3.5L Walker - Walker EPA Ultra Direct Fit Converter

P311-1B1CBEC    16438  New

Qty:
346.26
Walker Catalytic Converter  Center
  • Exhaust Gasket is Recommended Fits Fed. & Calif. Emission Models Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details. ; Additional Parts Needed: 31739, 31334 To 11/02
  • Walker EPA Ultra Direct Fit Converter
  • Product Attributes:
    • Air Tube: No
    • Body Shape: Round
    • California Air Resource Board (CARB) Certified: No
    • Converter Quantity: 1
    • Fitment: Direct Fit
    • Inlet 1 Type: 4 Bolt Welded Flange
    • Inlet Connection Type: 4 Bolt Welded Flange
    • Inlet Quantity: 1
    • Max Year Covered: 2009
    • Min Year Covered: 2002
    • Most Popular Make / Model:
      • Nissan Altima
      • Nissan Maxima
    • Most Popular Year: 2003
    • Outlet 1 Type: 4 Bolt Welded Flange
    • Outlet Connection Type: 3 Bolt Welded Flange
    • Outlet Quantity: 1
    • Overall Length:
      • 13.000
      • 14.750
    • Oxygen sensor location: Post Catalyst
    • Product Grade: Economy
    • Substrate Material: Ceramic
    • Total Part VIO:
      • 278644
      • 436962
Brand: Walker
Position: Center
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2003 - Nissan Altima Center V 6 Cyl 3.5L - 3498

Showing 1 - 10 of 43 Products for Catalytic Converter.