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MagnaFlow 5421031 Catalytic Converter - Rear
California OBDII Direct-Fit Converter
MagnaFlow 5421031 is a California Grade, CARB-compliant direct-fit catalytic converter built for rear exhaust replacement on select Ford Taurus and Mercury Sable applications. It uses stainless steel construction, a ceramic substrate, and an OE-style spun body design to support proper exhaust flow and a factory-style fit.
Compatible With 2004-2007 Ford Taurus, rear and 2004-2005 Mercury Sable, rear, this MagnaFlow California OBDII converter is engineered for vehicles that require a legal replacement in California and other CARB-restricted states.
Key Features
- Direct-fit design for bolt-on replacement without cutting or welding
- California Grade CARB-compliant construction for listed applications
- Stainless steel body and tubing for corrosion resistance
- OE-style spun body with a single laser fusion weld to reduce leak points
- Free-flowing mandrel-bent tubing for consistent exhaust routing
- Ceramic substrate for emissions control
- Gaskets included for sealing at installation
- Fits rear exhaust position on select Ford Taurus and Mercury Sable models
Product Details
MagnaFlow Direct-Fit CALIFORNIA OBDII CONVERTERS are built around vehicle-specific fitment and emissions compliance. Part number 5421031 is shaped to match the original exhaust layout on the listed Ford Taurus and Mercury Sable rear applications, helping simplify replacement while maintaining the correct mounting points and pipe geometry. The compact spun-body design supports thermal efficiency, while the stainless steel construction is intended to withstand everyday exhaust heat and road exposure.
This part number 5421031 is a direct replacement for the rear catalytic converter on 2004-2007 Ford Taurus and 2004-2005 Mercury Sable models listed in the fitment data. This part cross-references no additional part numbers provided for the same application.
What It Helps Fix
- Check engine light concerns related to catalytic converter efficiency
- Exhaust leaks at the converter connection points
- Corrosion damage to the original rear catalytic converter
- Failed emissions inspection on listed California-compliant applications
- Fitment issues caused by non-direct replacement exhaust parts
Installation Notes
Install using the proper tools and follow the vehicle-specific exhaust layout for the listed rear position. The bolt-on inlet and clamp-on outlet design support direct replacement, and the included gaskets should be used to help achieve a proper seal. No cutting or welding is required when installed on the confirmed applications.
Compatible With 2007 Ford Taurus, rear; 2006 Ford Taurus, rear; 2005 Ford Taurus, rear; 2005 Mercury Sable, rear; 2004 Ford Taurus, rear; 2004 Mercury Sable, rear.
Quality Assurance
MagnaFlow uses 3D scanning during development to verify fit and function against original equipment dimensions. Part number 5421031 is designed to meet or exceed California Air Resources Board requirements and has undergone additional testing for CARB guideline compliance on the listed vehicles.
| Brand | MagnaFlow |
|---|---|
| Part Number | 5421031 |
| Position | Direct-Fit CALIFORNIA OBDII CONVERTERS, Rear |
| Mounting Hardware Included | Yes |
| Universal Or Specific Fit | Specific |
| Grade Type | Regular |
| Tube Material | Stainless steel |
| Inlet Type | Bolt-on |
| Outlet Type | Clamp-on |
| Body Length | 11 |
| Heat Shield Attached | No |
| Inlet Quantity | 1 |
| Body Material | Stainless steel |
| Outlet Quantity | 1 |
| Substrate Material | Ceramic |
| Overall Length | 28.25 |
| Air Tube Count | 0 |
| Sensor Port Count | 0 |
| Air Tube Adaptable | No |
| Body Height | 4 |
| Body Shape | Round |
| Body Type | Spun |
| Body Width | 4 |
| Clamp Included | No |
| Converter Quantity | 1 |
| Finish | Stainless steel |
| Gasket Included | Yes |
| Hangers Included | No |
| Heat Shield Material | None |
| Inlet Diameter | 2.25 |
| Inlet Inside Diameter | 2.25 |
| Main Piping Diameter | 2.25 |
| Outlet Diameter | 2.25 |
This part fits 8 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2007 | Ford | Taurus | 3.0L | V6 | Rear | Certification Level : LEV2 LEV; CARB Executive Order D-193-147; Engine Family Number 7FMXV03.0VEY; Direct-Fit CALIFORNIA OBDII CONVERTERS |
| 2006 | Ford | Taurus | 3.0L | V6 | Rear | Certification Level : LEV2 LEV; CARB Executive Order D-193-147; Engine Family Number 6FMXV03.0VEY; Direct-Fit CALIFORNIA OBDII CONVERTERS |
| 2005 | Ford | Taurus | 3.0L | V6 | Rear | Certification Level : LEV2 LEV; CARB Executive Order D-193-147; Engine Family Number 5FMXV03.0VEY; Direct-Fit CALIFORNIA OBDII CONVERTERS |
| 2005 | Mercury | Sable | 3.0L | V6 | Rear | Certification Level : LEV2 LEV; CARB Executive Order D-193-147; Engine Family Number 5FMXV03.0VEY; Direct-Fit CALIFORNIA OBDII CONVERTERS |
| 2004 | Ford | Taurus | 3.0L | V6 | Rear | Certification Level : LEV2 LEV; CARB Executive Order D-193-147; Engine Family Number 4FMXV03.0VEM; Direct-Fit CALIFORNIA OBDII CONVERTERS |
| 2004 | Ford | Taurus | 3.0L | V6 | Rear | Certification Level : LEV2 LEV; CARB Executive Order D-193-147; Engine Family Number 4FMXV03.0VEY; Direct-Fit CALIFORNIA OBDII CONVERTERS |
| 2004 | Mercury | Sable | 3.0L | V6 | Rear | Certification Level : LEV2 LEV; CARB Executive Order D-193-147; Engine Family Number 4FMXV03.0VEM; Direct-Fit CALIFORNIA OBDII CONVERTERS |
| 2004 | Mercury | Sable | 3.0L | V6 | Rear | Certification Level : LEV2 LEV; CARB Executive Order D-193-147; Engine Family Number 4FMXV03.0VEY; Direct-Fit CALIFORNIA OBDII CONVERTERS |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.