Subject: Yes, a slight noise outside is normal, but not a loud noise that drowns Author: DavidC (moderator) : member since December, 2003 : 11909 posts Posted on: 2005-03-01 23:02:43

out the engine noise inside the cabin. When the pump goes bad, you'll definitely know it.

David Cecil, KI4GZR
'97 740iL, 129k miles
'92 750iL, 78k miles
'86 735i, 97k miles

www.e38.org has links for everything about your BMW 7-series automobile

• Secondary emissions air pump replacement procedure (pic) (url) - DavidC 2005-03-01 14:37:47 (31639 views)
  • Don't forget to replace the EGR valves, too! (url) - DavidC 2007-04-27 12:48:45 (1220 views)
    • Do I have this on my 97 740il? (nt) - alexe 2009-09-03 16:28:39 (40 views)
  • More info in a followup thread found here. (url) - DavidC 2005-12-09 12:19:44 (1140 views)
  • Re: Secondary emissions air pump replacement procedure - mortyk 2005-03-01 20:42:45 (1205 views)
  • Nice! Any other symptoms like SES, check engine or the like and - Magnum 2005-03-01 16:02:59 (1025 views)
    • There were no other symptoms and the SES light didn't illuminate (yet) - DavidC 2005-03-01 20:49:41 (1104 views)
      • Interesting, because after this post I listened to my car upon start up - Magnum 2005-03-01 21:41:59 (927 views)
        • Yes, a slight noise outside is normal, but not a loud noise that drowns - DavidC 2005-03-01 23:02:43 (846 views)
  • Damn. That's the longest extension I've ever seen! - sealbeach740 2005-03-01 15:39:53 (781 views)
  • Great write up! What is the purpose of this air pump? (nt) - silber98 2005-03-01 14:56:31 (1102 views)
    • Re: Great write up! What is the purpose of this air pump? - jbarton750 2005-03-01 15:46:41 (1316 views)
      • My Volvo has a similar pump... - txdarth 2005-03-01 18:45:50 (910 views)
  • David, do the V-8 4.0 liter have this pump also? - Gary 2005-03-01 14:42:51 (857 views)
    • Re: David, Great Article & Good Job!!! (nt) - HighLine740iL 2005-03-01 18:16:42 (761 views)
      • Re: David, Great Article & Good Job!!! - 81xavieromar 2006-02-28 18:19:11 (487 views)