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  #1  
Old 04-23-2015, 08:03 PM
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Secondary air pump
Hi
I have 2001 X5 BMW 4.4 with 160k miles

Today I replaced the chain tensioner, the fan clutch as well as the fan. Upon starting the car and turning it off, I noticed that the air pump stayed on. I discoed the black battery cable to make it shut off. However once I put the cable back on to the battery the pump started back up with the car off. Any suggestions?
Last edited by Csaviano; 04-23-2015 at 09:12 PM.
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  #2  
Old 04-23-2015, 09:11 PM
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Pull the relay controlling the Air Pump.
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Old 04-24-2015, 10:17 AM
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Cn90, Thank you for the reply. I unplugged the relay and plugged it back in. For now all seems to work fine. What happened remains a mystery !
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Old 04-24-2015, 11:02 AM
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Relay failure.

I'd remove the relay.
Then de-commission the SAS system.
Then place a small piece of black electrical tape over the dash CEL light.
Then scan for new codes (non-SAS codes) once a month.
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