Does Subaru have a catalytic converter?
Yes. Subaru's gasoline-powered vehicles are equipped with catalytic converters as part of the exhaust system to meet emissions standards. Electric vehicles, which have no tailpipe, do not use catalytic converters.
Emissions regulations require catalysts to convert harmful gases such as carbon monoxide, hydrocarbons, and nitrogen oxides into less harmful substances before they leave the exhaust. In Subaru models, the catalytic converter is typically part of a small exhaust aftertreatment assembly along with oxygen sensors that monitor performance. The exact layout varies by model, engine type, and the market where the vehicle is sold.
What catalytic converters do in Subaru models
These devices reduce emissions and help vehicles pass regulatory tests. Subaru generally uses a three-way catalyst that handles multiple pollutants and relies on oxygen sensors to optimize performance. In markets where diesel or alternative powertrains have been offered, additional emissions controls may be present.
Key facts about catalytic converters in Subaru vehicles across markets:
- Gasoline-powered Subarus sold in North America and most other regions include at least one catalytic converter in the exhaust system.
- Modern Subarus typically use a three-way catalytic converter (with integrated oxygen sensors) to reduce carbon monoxide, hydrocarbons, and oxides of nitrogen.
- In markets or models where diesel or alternative engines were offered, related exhaust aftertreatment devices such as diesel particulate filters may be used; gasoline Subarus generally do not use a DPF.
In summary, Subaru's gasoline models rely on catalytic converters to meet emissions standards, and the specific configuration varies by model and market.
Signs your catalytic converter may need attention
With any catalytic converter, prompt diagnosis is important if you notice changes in engine performance or exhaust behavior. Watch for the following indicators:
- Check engine light illuminated or engine codes related to emissions (e.g., P0420, P0430).
- Reduced acceleration or overall loss of power, especially during highway driving.
- Rattling or banging sounds from the underside of the vehicle, often when starting or idling.
- A sulfurous or rotten-egg smell from the exhaust.
- Failed emissions test or excessive exhaust smoke.
- Excessive heat under the vehicle or visible exhaust leaks around the exhaust system.
These signs warrant a diagnostic check by a qualified technician to determine whether the catalytic converter, oxygen sensors, or another part of the exhaust or engine is at fault.
Maintenance and replacement considerations
Regular maintenance and proper driving conditions help catalytic converters last longer. Here are factors that influence longevity and what you can do:
- Keep the engine well-tuned and address misfires promptly, as unburned fuel can overheat and damage the catalyst.
- Replace faulty oxygen sensors and ensure the engine runs as designed to maintain proper air-fuel balance.
- Avoid using leaded fuel or fuel additives that could contaminate the catalyst; use quality fuels and reputable fuel system cleaners as recommended.
- Address exhaust leaks promptly, as leaks can alter sensor readings and catalyst temperatures.
- Expect typical lifespans of many catalysts to be on the order of 70,000–100,000 miles or more, though severe conditions can shorten this.
Replacement can be costly and depends on model and whether OEM or aftermarket parts are used. If a failure is diagnosed, a mechanic can advise on repair or replacement options.
Summary
In short, Subaru's gasoline-powered vehicles are equipped with catalytic converters to meet emissions standards across most markets. The exact setup varies by model and region, but the principle remains the same: the catalyst reduces pollutants before exhaust leaves the vehicle. Electric Subarus and other plug-in alternatives do not require catalytic converters for propulsion, but any internal-combustion variants do rely on them for regulatory compliance and air quality.
Why are Subaru catalytic converters worth so much?
Catalytic converters have economic value as they contain precious metals. This is the main reason why they are sold as the most expensive scrap. Because it contains rhodium, palladium and platinum, which are among the most precious metals.
Which vehicles do not have catalytic converters?
Cars that don't have catalytic converters are all-electric vehicles (EVs) and gasoline-powered cars made before 1975. EVs don't have them because they have no tailpipe emissions, while older cars were made before the technology was federally mandated. Some diesel vehicles also may not have them, depending on their age and specific emissions equipment, as they contain different precious metals that are less valuable to thieves.
Electric vehicles (EVs)
- How they work: EVs use an electric motor for propulsion and do not have an internal combustion engine that produces exhaust gases.
- Examples: Tesla, Nissan Leaf, and Chevy Bolt are examples of EVs that do not require catalytic converters.
Cars made before 1975
- Mandate history: Catalytic converters became mandatory for all new cars in the United States with the 1975 model year due to the Clean Air Act.
- Exemption: Therefore, any vehicle manufactured in 1974 or earlier is not required to have one.
Diesel vehicles
- Thief deterrent: Some diesel vehicles, particularly older ones, may not have catalytic converters because they don't contain the same precious metals (like platinum, palladium, and rhodium) that thieves seek in gasoline car converters.
- Varying emissions equipment: While many diesel cars do have converters for emissions control, this is an exception based on specific requirements for certain types of vehicles.
Does a Subaru have a catalytic converter?
If your Subaru feels sluggish or less responsive than usual, particularly when accelerating, it could indicate a problem with the catalytic converter. A clogged or damaged converter can restrict exhaust flow, leading to decreased engine efficiency and performance.
Are Subaru Foresters targeted for catalytic converter theft?
Lower-emission cars like Toyota Priuses, Subaru Foresters and Honda Elements are primarily targeted due to higher concentrations of valuable metals inside converters.
