BMW CODE P0420 P0430 CATALYTIC CONVERTER SERVICE ENGINE LIGHT - YouTube
P0420 and P0430 codes - 5Series.net - Forums
2003 2009 bmw x5 4.4i code p0430 p0420 how to fix get rid of codes p0420 p0430 on bmw x5 4.4I - YouTube
BMW E90 Oxygen Sensor Replacement | E91, E92, E93 | Pelican Parts DIY Maintenance Article
P0430 Code: Check engine light came on and got this code. Going to replace O2 sensors first to hopefully get rid of code but cat looks rusted out. What do y'all think