Car owners sometimes find, to their dismay, that their catalytic converters have been stolen because of the platinum inside.

However, cars built after 1981 typically have three-way catalytic converters, which go one step farther to convert harmful nitrogen oxides into regular nitrogen and oxygen. No matter the type of ...

Most modern cars are equipped with three-way catalytic converters. This refers to the three regulated emissions it helps to reduce. ­The reduction catalyst is the first stage of the catalytic ...

Demonstrators hold pictures of actor Johnny Wactor, who police say was shot to death last year by three catalytic converter thieves in downtown Los Angeles. (Genaro Molina / Los Angeles Times) ...