If your O2 sensor was indeed bad, then the car most likely ran rich, which ruins the cat.
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'05 E46 M3 Imolarot/Cinnamon - CURRENT
'98 E36 M3 Estorilblau/Dove - SOLD
'90 E30 M3 Brilliantrot/Black - SOLD
SRS BSNS Motorsports - 24hrs of LeMons Racer
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