Actually, they don't. They have trap oxidizers which have the same effect of a catalytic converter but is an entirely different part.
No they do not.
From 1994 onwards, they were required to have a Diesel Oxidation Catalyst. From 2008 onwards (in the US), a set of emissions standards requiring highway diesel engines to have a Diesel Particulate Filter went into effect. From 2012 onwards, engines over a certain displacement required a complete aftertreatment system, with a DOC, DPF, and Selective Catalytic Reduction, which uses Diesel Exhaust Fluid (DEF).
Diesel vehicles do not have catalytic converters. Diesels sometimes have a part called a resonator or a diesel particulate filter. Since it doesn't exist, there is no legality issue.
4 cylinder engines have one, v-6 engines have 2.
Diesels as a rule don't have catalytic converters. THey might have particle filters though.
No, planes don't have catalytic converters.
Old ones. Pre 1972's, before catalytic converters.
None. A Diesel Oxidation Catalyst and a catalytic converter (as used on gas engines) are extremely different, as is their construction.
are catalytic converters covered by a warrenty
A Ford Escape has three catalytic converters. It is known that the top two catalytic converters and their coils are costly.
Only if the exhuast is vented outside.
I believe there are two or three Catalytic Converters