Reviving an old thread that I started! This problem was fixed by installing a new secondary air pump.

Now it seems this problem came back. I'll have to double check the code but I believe it was for secondary air system - pump blocked. Now on every cold start, the pump runs for about 5 seconds and immediately shuts off. When there was no code, it would run normal, around 30 seconds.

I should also mention that this problem occurred within a few days after cleaning my air filter and MAF. I have the AFE stage 1 intake Pro Dry Version. Cleaned it with the factory cleaner and cleaned the MAF with MAF cleaner. I allowed the filter to completely dry for about 4-6 hours.

Also as shown in the beginning of the post, I replaced the pump at around 100,000 miles and now I have 160,000.

Any suggestions rather than buying a new pump?

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2005 BMW X5 3.0i
2013 BMW M3 Competition