What is this for ??????
- Thread starter plowy
- Start date
Bracket for the secondary air pump 
http://www.realoem.com/bmw/showparts.do ... g=41&fg=10
I'm struggling to recall, but I don't remember that part on mine :scratchhead:
http://www.realoem.com/bmw/showparts.do ... g=41&fg=10
I'm struggling to recall, but I don't remember that part on mine :scratchhead:
In some regions (don't know where?) there must be a secondary air pump for emissions maybe??
I think it a USA thing.
Well don't know what the criteria is for having it - so far
04 2.5 US
06 ///M US
07 ///M UK
04 3.0 US
I'm pretty sure mine [05 3.0] never had it. I've got a picture of an Italian 04 3.0 that has it too.
And you can see it in the press pics too
04 2.5 US
06 ///M US
07 ///M UK
04 3.0 US
I'm pretty sure mine [05 3.0] never had it. I've got a picture of an Italian 04 3.0 that has it too.
And you can see it in the press pics too
My european 2003 2.5i got it too
bingboybri
Member
my uk 03 3.0ise has bracket but no air pump......
The thread from the dead!
The Secondary Air Pump is a known problem for failure. Not really that often but more than other parts on the car.
The SAP runs upon engine startup for 90 seconds. It injects air (oxygen) into the exhaust gases to allow any unburnt hydrocarbons to have sufficient oxygen to burn off, and to help the O2 sensors to heat faster. This is due to (as stanley said) the emissions system (O2 sensors) to be running in 'Open Loop' mode and the DME using a default fuel mapping. The system will go into 'CLosed Loop' mode when the O2 sensor heaters reach approximately 600'.
The SAP should NOT start then stop then start again. It should just run for 90 seconds.
You should be able to hear the pump running at startup. Especially with the hood open.
From http://forums.bimmerforums.com/forum/showthread.php?1319763-Secondary-Air-Pump
The SAP runs upon engine startup for 90 seconds. It injects air (oxygen) into the exhaust gases to allow any unburnt hydrocarbons to have sufficient oxygen to burn off, and to help the O2 sensors to heat faster. This is due to (as stanley said) the emissions system (O2 sensors) to be running in 'Open Loop' mode and the DME using a default fuel mapping. The system will go into 'CLosed Loop' mode when the O2 sensor heaters reach approximately 600'.
The SAP should NOT start then stop then start again. It should just run for 90 seconds.
You should be able to hear the pump running at startup. Especially with the hood open.
From http://forums.bimmerforums.com/forum/showthread.php?1319763-Secondary-Air-Pump