S70 L5-2.4L VIN 55 B5254S (1998)
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Catalytic Converter: Description and Operation
TWC
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The TWC cleans exhaust gases by oxidizing unburned: carbon monoxide (CO) hydrocarbons (HO) nitrogen oxides (NOx).
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90-95% of these harmful substances are converted into innocuous: water (H20) carbon dioxide (CO2) nitrogen (N2)
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The active surface area of the unit is about 43,000 m2 and the noble metal content of about 3.5 grammes platinum/rhodium.
NOTE: Lead in fuel will damage the TWC, quickly making it unserviceable.