Pre-converters
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Driver School Candidate
Joined: Mar 2012
Posts: 2
Likes: 0
From: Virginia
Pre-converters
IS there such a thing as a pre-converter for a 2004 ls430? Mechanic recommended 2...… Plus gaskets 2 upper & 2 lower.....Idea for parts costs
Car has 270,000 but runs really good
Car has 270,000 but runs really good
Lexus Champion
Joined: Oct 2019
Posts: 17,926
Likes: 1,702
From: Ohio
Yes but those are actually the main ones, each side of the engine has a cat bolted immediately to the manifold then a y pipe leading to a larger 2ndary cat that is not monitored by the system.
The OE cats are very expensive to the order of $800-1000 but if it was my car those are what I would use.
The OE cats are very expensive to the order of $800-1000 but if it was my car those are what I would use.
Intermediate
Joined: Sep 2018
Posts: 277
Likes: 73
From: GA
Why does your mechanic recommend to replace the converters? If your check engine light isnt saying they are bad I wouldn't replace then until it does. Even if the ecu says the cats are bad you can put a spacer on the oxygen sensors that will fool the ecu into thinking the cats are ok for a little while.
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jpv7774
LS - 3rd Gen (2001-2006)
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Apr 8, 2017 03:39 PM
