Dorman 678-521 front catalytic converter for the 2009-2014 Nissan Maxima V6 3.5L treats exhaust gases before they leave the tailpipe. It is a pre-converter in Dorman's OE Solutions line.
- Standard replacement grade with flanged inlet and outlet
- Stainless steel body and tube with a ceramic substrate
- CARB compliant under Executive Order D-798-9, and New York certified
- Round inlet and outlet ports with a 0.125 in tube wall
- Manufactured within strict tolerances for durability
Quick facts
- Part: Dorman 678-521 catalytic converter
- Fits: 2009-2014 Nissan Maxima V6 3.5L
- Position: Front
- Material: Stainless Steel
- Condition: New
A rattle from the exhaust, a check engine light or weak performance can mean the converter is worn, though a faulty oxygen sensor or a leak in the exhaust can lie behind them too.
Fits
Sold as a catalytic converter for the 2009-2014 Nissan Maxima V6 3.5L, it is a direct-fit replacement, and the car takes one, in the front position.
Specifications
Fit and size
- Position: Front
- Quantity per vehicle: 1
- Overall length: 9.2 in
- Inlet outside diameter: 4 in
- Inlet inside diameter: 3.79 in
- Outlet outside diameter: 4.4 in
- Outlet inside diameter: 1.89 in
- Tube wall thickness: 0.125 in
- Mounting holes: 6 at the inlet, 2 at the outlet
Build and materials
- Type: Flanged pre-converter, standard replacement grade
- Material: Stainless Steel
- Substrate: Ceramic
- Finish: Natural
- Heat shield: not attached
- CARB Executive Order number: D-798-9
- Condition: New
- Country of origin: United States
In the box
One converter assembly, one inlet gasket, one outlet gasket, 8 bolts and 8 washers. Clamps and hangers are not included.
Interchange: 551128 · 208A34RF0A · 208A39N70A
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
551128, 208A34RF0A, 208A39N70A
Frequently Asked Questions
Does the Dorman 678-521 fit the 2009-2014 Nissan Maxima V6 3.5L?
Yes. Dorman 678-521 is a front catalytic converter listed for the 2009-2014 Nissan Maxima V6 3.5L, and the car takes one.
Do gaskets and bolts come with this catalytic converter?
Yes. The Dorman 678-521 includes one inlet gasket, one outlet gasket, 8 bolts and 8 washers with the converter assembly. Clamps and hangers are not included.
Is this front catalytic converter stainless steel with a ceramic substrate?
Yes. The body and tube are stainless steel, and the substrate is ceramic. The inlet and outlet are flanged.
Is this front catalytic converter CARB compliant?
Yes. It is CARB compliant under Executive Order D-798-9 and is also New York certified.
Does Dorman 678-521 replace 208A34RF0A?
Yes. Dorman 678-521 replaces 208A34RF0A, along with 551128 and 208A39N70A.
