this is a BMW E46 2002 330i. the secondary air pump (SAP) monitor will not reset for SMOG. i found out that the SAP and the valve were not the problem. i decided to replace both the pre-cat O2 sensors mentioned one of the forum member. i started the engine and the SAP monitor reset right away and passed the SMOG test.
⚠️ i'm not a certified auto mechanic...i just love to work on my own cars...so DIY at your own risk ✌️
always remember...safety first
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