A Guide to the Catalytic Converter on Your 2005-2006 Saab 9-2X
Keep your 'Saabaru' running clean and efficiently by understanding its unique catalytic converter needs.
- You MUST correctly identify your car as a 2.5L Linear or 2.0L Turbo Aero model before ordering.
- The P0420 code is the most common sign of failure, but you should rule out bad O2 sensors or exhaust leaks first.
- Always fix the underlying engine problem (like misfires) that caused the original converter to fail.
- Due to the age of the vehicle, expect exhaust bolts to be heavily rusted and difficult to remove.
Understanding Your 9-2X's Catalytic Converter
Since the 2005-2006 Saab 9-2X is based on the Subaru Impreza and WRX, its exhaust system is pure Subaru. This is good news for finding parts. However, it's critical to know which model you have. The 2.5L 'Linear' model (based on the Impreza) and the 2.0L Turbo 'Aero' model (based on the WRX) have different engines and different catalytic converter setups. Always confirm your sub-model before buying a replacement part.
Symptoms of a Failing Catalytic Converter
A bad catalytic converter will almost always let you know something is wrong. The most common sign is the Check Engine Light, usually with a P0420 error code. Other signs include:
- Loss of Power: Your car may feel sluggish or struggle to accelerate because a clogged converter restricts exhaust flow.
- Rattling Noise: If you hear a rattling from under the car, it could be the internal honeycomb structure breaking apart.
- Bad Smell: A rotten egg or sulfur smell from the exhaust means the converter isn't processing gases correctly.
- Poor Fuel Economy: A failing converter can make your engine less efficient, causing you to use more gas.
Always Fix the Root Cause First!
A catalytic converter usually fails because of another problem. Common causes include a bad ignition system, engine misfires, or oil/coolant leaks that contaminate the converter. Simply replacing a failed converter without fixing the original issue will cause the new one to fail quickly. Always diagnose and repair any engine issues before installing a new catalytic converter.
Choosing the Right Aftermarket Converter
OEM (Original Equipment Manufacturer) converters are expensive. Aftermarket parts offer a more affordable solution, but quality can vary. For a Subaru-based car like the 9-2X, it's important to choose a quality replacement, as these cars can be sensitive to aftermarket cats and may still throw a code if the part isn't efficient enough.
Here is a general breakdown of common aftermarket brands:
- Premium Aftermarket (MagnaFlow, Walker): These brands are well-regarded in the Subaru community. They build durable, stainless steel converters designed to match OEM performance and often offer direct-fit options that don't require welding. MagnaFlow is often seen as a performance-oriented choice, while Walker is known for reliable, OE-style replacements.
- Standard/Economy Aftermarket (AP Exhaust, Davico, Eastern, Evan Fischer): These brands provide a budget-friendly option. They are widely available and can be a good choice if you need to pass an emissions test on a tight budget. However, their longevity might not match premium brands, and some forum users report issues with check engine lights returning.
Pro Tip: Before you buy, check your state's emissions laws. States like California and New York require CARB-compliant converters, which are more expensive but built to a higher standard. Most other states allow for Federal EPA-compliant parts.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Converter | $178 - $864 |
| Shop Labor | $200 - $450 |
| Total Estimated Cost | $378 - $1,314 |
Frequently Asked Questions
What is the P0420 code? 🎬 Watch this video to understand P0420 causes and solutions.
The P0420 code means "Catalyst System Efficiency Below Threshold (Bank 1)." In simple terms, your car's computer has detected that the catalytic converter is no longer effectively cleaning the exhaust gases. While this is most often caused by a failing converter, it can also be triggered by a bad oxygen sensor or an exhaust leak.
Do I need a special converter for my 9-2X Aero (turbo) model?
Yes. The turbocharged Aero model has a different exhaust system than the non-turbo Linear model. The Aero features a catalytic converter in the uppipe (before the turbo) and another in the downpipe (after the turbo). The uppipe cat on early WRX models (which the 9-2X Aero is based on) was known to fail and send debris into the turbo. Many owners choose to replace it with a catless uppipe for this reason, but be aware this is for off-road use only and will not be emissions compliant. You must order a part that is specified for the 2.0L turbo engine.
Were there any recalls for the 9-2X catalytic converter?
No, there have been no specific recalls from the NHTSA for the catalytic converter on the 2005-2006 Saab 9-2X. However, there were numerous recalls for the Takata airbags in these vehicles.
Will an aftermarket converter last as long as the original?
It depends. A premium aftermarket converter from a brand like MagnaFlow or Walker can be very durable, but it may not last as long as the original OEM part. Cheaper, economy-grade converters will likely have the shortest lifespan. The most important factor for longevity is ensuring any engine problems that caused the original failure are fixed before installing the new part.
Helpful Videos
Technical Specifications
OEM Part Numbers: 32007286 32007296 32010450 32010459 32010460
Vehicle is a rebadged Subaru Impreza. The 'Linear' model uses a naturally aspirated 2.5L engine. The 'Aero' model uses a turbocharged 2.0L engine from the Subaru WRX. The exhaust systems and catalytic converters are different between these two models and are not interchangeable.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Saab 9-2X: