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2004 Nissan Altima

2004 Nissan Altima Catalytic Converters

Your sedan’s fuel economy could worsen if it has a faulty catalytic converter. You shouldn’t let this issue persist because it can cause engine-related problems like poor acceleration. Good thing CarParts.com is a one-stop shop for all sorts of parts and accessories including 2004 Nissan Altima catalytic converters. Our catalytic converters follow OE specifications, so you can be sure that they’ll meet your respective state’s laws. Experience our low prices and fast shipping now and shop for a 2004 Nissan Altima catalytic converter!
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Rear Direct Replacement Series Direct Fit Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: JN960327
Guaranteed to Fit
$224.99
Vehicle Fitment
  • 2004 Nissan Altima SE 6 Cyl 3.5L Manual Transaxle, No O2 Port
Product Details
Location : RearEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 39.25 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyEPA : N/TB6000/64805NNGasket Included : With GasketOxygen Sensor Ports : Factory OE PortsOxygen Sensor Port Location : Factory OE LocationsWarranty : 5-year or 50,000-mile JC Whitney limited warrantyReturns Policy : 30-Day Return PolicyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 18316, 40553, 54478, 4396Series : Direct Replacement SeriesTube Material : Aluminized Steel
Front, Driver Side Direct Replacement Series Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: JN960312
Guaranteed to Fit
$139.99
Vehicle Fitment
  • 2004 Nissan Altima SE 6 Cyl 3.5L 4-Speed, Automatic Transaxle, 1 O2 Port
Product Details
Location : Front, Driver SideEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 13 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyEPA : N/TB6000/30407NNGasket Included : With GasketOxygen Sensor Ports : Factory OE PortsOxygen Sensor Port Location : Factory OE LocationsWarranty : 5-year or 50,000-mile JC Whitney limited warrantyReturns Policy : 30-Day Return PolicyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 18032, 40420, 16221, 1423Series : Direct Replacement SeriesTube Material : Aluminized Steel
Rear Direct Replacement Series Direct Fit Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: JN960332
Guaranteed to Fit
$204.99
Vehicle Fitment
  • 2004 Nissan Altima Base 4 Cyl 2.5L
  • 2004 Nissan Altima SL 4 Cyl 2.5L
  • 2004 Nissan Altima S 4 Cyl 2.5L
Product Details
Location : RearEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 40.5 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyEPA : N/TB6000/63005NNGasket Included : With GasketOxygen Sensor Ports : Factory OE PortsOxygen Sensor Port Location : Factory OE LocationsWarranty : 5-year or 50,000-mile JC Whitney limited warrantyReturns Policy : 30-Day Return PolicyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 18120, 40514, 54360, 4295Series : Direct Replacement SeriesTube Material : Aluminized Steel
Radiator Side Catalytic Converter, (4-Speed, Automatic)/Manual Transmissions, 3.5L Engine, Federal EPA, 46-State Cannot ship to/installed in vehicles purchased in CA/CO/NY/ME, 13 In. Overall Length
Part Number: REPN960312
Guaranteed to Fit
$130.49
Vehicle Fitment
  • 2004 Nissan Altima SE 6 Cyl 3.5L 4-Speed, Automatic Transaxle, Radiator Side, Precat
Product Details
Location : Front, Driver SideEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 13 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyEPA : N/TB6000/30407NNGasket Included : With GasketOxygen Sensor Ports : Factory OE PortsOxygen Sensor Port Location : Factory OE LocationsWarranty : 5-year or 50,000-mile Evan Fischer limited warrantyReturns Policy : 30-Day Return PolicyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 40420Series : Direct Replacement SeriesTube Material : Aluminized Steel
Front and Rear, Driver and Passenger Side Catalytic Converters, Automatic/Manual Transmissions, 3.5L Engine, 4-Speed, Federal EPA, 46-State Cannot ship to/installed in vehicles purchased in CA/CO/NY/ME
Part Number: SET-REPN960312-3
Guaranteed to Fit
$460.99
Vehicle Fitment
  • 2004 Nissan Altima SE 6 Cyl 3.5L 4-Speed, Automatic Transmission, Automatic Transaxle, Radiator Side, Precat, Firewall Side, Undercar
Product Details
Location : Front and Rear, Driver and Passenger SideEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Components : (1) Firewall Side Catalytic Converter, (1) Radiator Side Catalytic ConverterRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Set of 3Gasket Included : Firewall Side - Without Gasket; Rear - With GasketOxygen Sensor Ports : Factory OE PortsOxygen Sensor Port Location : Factory OE LocationsWarranty : 5-year or 50,000-mile Evan Fischer limited warrantyReturns Policy : 30-Day Return PolicyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Direct Replacement SeriesTube Material : Aluminized Steel
Front, Driver and Passenger Side Catalytic Converters, Automatic/Manual Transmissions, 3.5L Engine, 4-Speed, Federal EPA, 46-State Cannot ship to/installed in vehicles purchased in CA/CO/NY/ME
Part Number: SET-REPN960325-2
Guaranteed to Fit
$267.99
Vehicle Fitment
  • 2004 Nissan Altima SE 6 Cyl 3.5L 4-Speed, Manual Transmission, Radiator Side, Precat, Firewall Side
Product Details
Location : Front, Driver and Passenger SideEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Components : (1) Firewall Side Catalytic Converter, (1) Radiator Side Catalytic ConverterRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Set of 2Gasket Included : With GasketOxygen Sensor Ports : Factory OE PortsOxygen Sensor Port Location : Factory OE LocationsWarranty : 5-year or 50,000-mile Evan Fischer limited warrantyReturns Policy : 30-Day Return PolicyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Direct Replacement SeriesTube Material : Aluminized Steel
Front Catalytic Converter, 2.5L Engine, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally Purchased In CA, CO, NY or ME), 19 In. Overall Length
Part Number: REPN960339
Guaranteed to Fit
$136.89
Vehicle Fitment
  • 2004 Nissan Altima Base 4 Cyl 2.5L
  • 2004 Nissan Altima SL 4 Cyl 2.5L
  • 2004 Nissan Altima S 4 Cyl 2.5L
Product Details
Location : FrontEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : Manifold Converter; 19 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Manifold ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyEPA : N/CA/TWG/203-1302Gasket Included : With GasketOxygen Sensor Ports : Factory OE PortsOxygen Sensor Port Location : Factory OE LocationsWarranty : 5-year or 50,000-mile Evan Fischer limited warrantyReturns Policy : 30-Day Return PolicyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 40810Series : Direct Replacement SeriesTube Material : Aluminized Steel
Rear Catalytic Converter, 2.5L Engine, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: REPN960332
Guaranteed to Fit
$203.99
Vehicle Fitment
  • 2004 Nissan Altima Base 4 Cyl 2.5L Undercar
  • 2004 Nissan Altima SL 4 Cyl 2.5L Undercar
  • 2004 Nissan Altima S 4 Cyl 2.5L Undercar
Product Details
Location : RearEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 40.5 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyEPA : N/TB6000/63005NNGasket Included : With GasketOxygen Sensor Ports : Factory OE PortsOxygen Sensor Port Location : Factory OE LocationsWarranty : 5-year or 50,000-mile Evan Fischer limited warrantyReturns Policy : 30-Day Return PolicyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 40514Series : Direct Replacement SeriesTube Material : Aluminized Steel
Front and Rear Catalytic Converters, 2.5L Engine, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: SET-REPN960339-2
Guaranteed to Fit
$323.99
Vehicle Fitment
  • 2004 Nissan Altima Base 4 Cyl 2.5L Undercar
  • 2004 Nissan Altima SL 4 Cyl 2.5L Undercar
  • 2004 Nissan Altima S 4 Cyl 2.5L Undercar
Product Details
Location : Front And RearEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : Manifold ConverterComponents : (1) Front Manifold Catalytic Converter (1) Rear Catalytic ConverterRestricted States : California|Colorado|New York|MaineType : Front - Manifold Converter; Rear - Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Set of 2Gasket Included : With GasketOxygen Sensor Ports : Factory OE PortsOxygen Sensor Port Location : Factory OE LocationsWarranty : 5-year or 50,000-mile Evan Fischer limited warrantyReturns Policy : 30-Day Return PolicyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 40514, 40810Series : Direct Replacement SeriesTube Material : Aluminized Steel
Rear Catalytic Converter, (4-Speed, Automatic/Manual Transmission, 3.5L Engine, Federal EPA, 46-State Cannot ship to/installed in vehicles purchased in CA/CO/NY/ME, 39.25 In. Overall Length
Part Number: REPN960327
Guaranteed to Fit
$203.79
Vehicle Fitment
  • 2004 Nissan Altima SE 6 Cyl 3.5L 4-Speed, Automatic Transaxle, Undercar
Product Details
Location : RearEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 39.25 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyEPA : N/TB6000/64805NNGasket Included : With GasketOxygen Sensor Ports : Factory OE PortsOxygen Sensor Port Location : Factory OE LocationsWarranty : 5-year or 50,000-mile Evan Fischer limited warrantyReturns Policy : 30-Day Return PolicyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 40553Series : Direct Replacement SeriesTube Material : Aluminized Steel
Front and Rear, Passenger Side Catalytic Converters, (4-Speed, Automatic)/Manual Transmissions, 3.5L Engine, Federal EPA, 46-State Cannot ship to/installed in vehicles purchased in CA/CO/NY/ME, Set of 2
Part Number: SET-REPN960327-2
Guaranteed to Fit
$336.99
Vehicle Fitment
  • 2004 Nissan Altima SE 6 Cyl 3.5L 4-Speed, Automatic Transmission, Firewall Side, Precat, Undercar
Product Details
Location : Front and Rear, Passenger SideEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Components : (1) Catalytic Converter, (1) Front Firewall Side Catalytic ConverterRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Set of 2Gasket Included : With GasketOxygen Sensor Ports : Factory OE PortsOxygen Sensor Port Location : Factory OE LocationsWarranty : 5-year or 50,000-mile Evan Fischer limited warrantyReturns Policy : 30-Day Return PolicyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Direct Replacement SeriesTube Material : Aluminized Steel
Firewall Side Catalytic Converter, (4-Speed, Automatic)/Manual Transmissions, 3.5L Engine, Federal EPA, 46-State Cannot ship to/installed in vehicles purchased in CA/CO/NY/ME
Part Number: REPN960325
Guaranteed to Fit
$151.25
Vehicle Fitment
  • 2004 Nissan Altima SE 6 Cyl 3.5L Manual Transaxle, Firewall Side, Precat
Product Details
Location : Front, Passenger SideEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 14 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyEPA : N/TB6000/501-430Gasket Included : Without GasketOxygen Sensor Ports : Factory OE PortsOxygen Sensor Port Location : Factory OE LocationsWarranty : 5-year or 50,000-mile Evan Fischer limited warrantyReturns Policy : 30-Day Return PolicyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 40552Series : Direct Replacement SeriesTube Material : Aluminized Steel
Front, Driver Side Exact Fit Series Direct Fit Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: DAV18032
Guaranteed to Fit
$201.49
Vehicle Fitment
  • 2004 Nissan Altima SE 6 Cyl 3.5L 4-Speed, Automatic Transaxle, 1 O2 Port
Product Details
Location : Front, Driver SideEmissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 13.75 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Direct FitRecommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : With GasketOxygen Sensor Ports : Factory OEM PortsOxygen Sensor Port Location : Factory OEM LocationsWarranty : 25,000-mile Davico limited warranty on catalyst emission properties and 5-year or 50,000-mile limited warranty on tube, shell and weldsProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 40753, 1196Series : Exact Fit SeriesTube Material : Aluminized Steel
Heavy Metal Series Semi-Universal (Welding Required) Catalytic Converter, Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)
Part Number: M6699205HM
Guaranteed to Fit
$178.00
Vehicle Fitment
  • 2004 Nissan Altima Base 4 Cyl 2.5L Cutting And Welding Required
  • 2004 Nissan Altima S 4 Cyl 2.5L Cutting And Welding Required
  • 2004 Nissan Altima SL 4 Cyl 2.5L Cutting And Welding Required
Product Details
Emissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be installed in vehicles originally purchased in CA, CO, NY or ME)Notes : 2.25 in. Inlet/Outlet; 13 in. overall lengthRestricted States : California|Colorado|New York|MaineType : Catalytic ConverterProduct Fit : Semi-Universal (Welding Required)Recommended Use : OE ReplacementQuantity Sold : Sold individuallyGasket Included : Without GasketWarranty : Lifetime Magnaflow Limited WarrantyReturns Policy : NON-RETURNABLEProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : Magnaflow Catalytic Converter SaleSeries : Heavy Metal SeriesTube Material : Stainless Steel
No Returns Accepted - Catalytic Converter, CARB and Federal EPA Standards, 50-state Legal, Semi-Universal (Welding Required)
Part Number: M66444105
Guaranteed to Fit
$327.00
Vehicle Fitment
  • 2004 Nissan Altima SE 6 Cyl 3.5L EO# D-193-96; Eng Fam No: 4Nsxv03.5N7A; Cutting And Welding Required
Product Details
Location : Front, Driver or Passenger SideEmissions : CARB and Federal EPA Standards, 50-state LegalNotes : 2.25 in. Inlet/Outlet; 13 in. overall lengthType : Catalytic ConverterProduct Fit : Semi-Universal (Welding Required)Recommended Use : OE ReplacementQuantity Sold : Sold individuallyEO Number : D-193-96Gasket Included : Without GasketWarranty : Magnaflow 5 year / 50,000 Mile Limited WarrantyReturns Policy : NON-RETURNABLEProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : Magnaflow Catalytic Converter SaleSeries : California SeriesTube Material : Stainless Steel
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Helpful Automotive Resources

P0430 Code: Catalyst System Efficiency Below Threshold  (Bank 2)
P0430 Code: Catalyst System Efficiency Below Threshold (Bank 2)In most cases, a vehicle with an inefficient catalytic converter will continue to run just fine. But if the converter is obstructed internally, it can cause poor engine performance and may even damage the engine in the long run.
P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3
P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3Bank 1 is the side of the engine where the #1 cylinder is located. P0042 code is set when your car’s PCM determines a potential problem with the heater element circuit of the oxygen sensor.
Can You Drive Without a Catalytic Converter?
Can You Drive Without a Catalytic Converter?Technically, yes. Older cars ran just fine before catalytic converters became commonplace in the 1970s. So, if your question is whether your car will run without one, then it most certainly will. But the other question you should be asking is—should you risk it?  Removing or disabling the catalytic converter could
P0316 Code: Engine Misfire Detected on Startup (First 1000 Revolutions)
P0316 Code: Engine Misfire Detected on Startup (First 1000 Revolutions)The PCM may disable the misfiring cylinder or cylinders in order to prevent further damage to the engine. Code P0316 is often listed in addition to one or more of the P0300 series codes that are associated with the misfiring cylinder/s.
P0134: O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 1)
P0134: O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 1)The Bank 1 portion of the code refers to the side of the engine with the number one cylinder. Sensor 1 refers to the upstream O2 sensor.
How to Tell If the Catalytic Converter is Clogged
How to Tell If the Catalytic Converter is CloggedA clogged catalytic converter will present symptoms, while a chemically failed cat con that’s not clogged typically just illuminates the check engine light or malfunction indicator lamp (MIL). Also, if the cat con that just fails chemically but doesn’t clog is not the light-off cat con (the cat con closest