Time to replace the catalytic converter

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Big Al

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My 2003 3.7 L has had the P0420 since I purchased it a month ago. Mechanic says I need a new converter. So is there 3 Cats on this Jeep.
Buy OEM or has anyone had good luck with aftermarket ones.
 

tommudd

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02-early 03 have 3 , 04 on has two
OEM is best, a lot of the aftermarket do not flow as well as stock MOPAR
 

Big Al

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So, need to get it scanned to find out which one is at fault I guess.
How much if I DIY.
How much if I take it in to it.
Should I do everything from the manifolds to the tail pipe, (tail pipe and muffler has holes in them) or just do the single failing cat.
My build was 09/02, 3 cats I guess.
 

LibertyTC

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The OEM cats are best, but very expensive.
The lesser expensive option, would be the Walker Cats.
There are some threads where members have used the walkers, with good success.
 

LONGJEEPOWNER

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I just put a set of Walkers on my 2010 Jeep Liberty and the work fine so far. Replaced the whole Y pipe which goes to the muffler.
 
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LONGJEEPOWNER

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Amazingly enough the scrap money I received from the old ones was enough to pay for the bill new ones!
 
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