It has only 1 catalytic converter.
SOURCE: 2003 kia sorento coolant change
you shoud not have to change it.this wouldbe long life
antifreeze have the PH check at a shop
SOURCE: kia sorento 2003
You can buy a Haynes Manual (cheap) thats good to have and it tells you where every wire in the vehicle goes along with many other things on repairing it.
SOURCE: what are the symtoms of a bad catalytic converter
a bad converter will give off a "rotten egg" smell, restrict the exhaust & cause the engine to operate at a hotter temperature, the heater will be excessively hot, the radiator or heater core could begin to leak, hoses will have extra pressure on them & there will be blow-by fumes forcing their way back from the exhaust maniforld into the engine if the converter becomes too plugged. This causes your motor oil to become dirty much more quickly too, causing extra wear on the engine You can generally see a very rusted exhaust behind the converter once this has happened. You'll get a miss, followed by sputtering & eventually either a frozen motor, blown headgasket, cracked head, or other problems caused by heat. good luck
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