Thread: oxygen sensor
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      03-02-2023, 07:31 PM   #3
pbonsalb
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Drives: 18 F90 M5, 99 E36 M3 Turbo
Join Date: Feb 2011
Location: New England

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Those won’t work to prevent a CEL on these cars with catless primaries. There are some high flow cat primaries that won’t give a CEL but they are expensive. Catless secondaries cause no issues and are the simplest way to go if you do not want to pay $4000 for high flow cat primaries or flash tune the car.
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