Subject: Don't the 2001's all have the newer ultrasonic sensor in the headliner? Author: DavidC (moderator) : member since December, 2003 : 11909 posts Posted on: 2008-03-13 23:13:07

There was a problem with the headliner-mounted motion sensors in the earlier e38's that would cause false alarms (my '97 had it), and I would have to do the double-locking as you describe to disable the sensor. I'm not sure why your case is setting off the alarm if you disable it with the double-lock trick, though.

You might check the model number of the sensor in your headliner and see if there's a newer version of it.

David Cecil
Lexington, KY
'97 740iL, 164k miles
'92 750iL, 92k miles
'86 735i, 101k miles

Visit e38.org for everything technical about your BMW

• Alarm system - jwarmuth 2008-03-13 22:26:29 (383 views)
  • BTW, are you Jeff Warmuth from Northern VA, near DC and used to work for STK? (nt) - larryd740il as sdmike 2008-03-14 18:11:01 (258 views)
  • +whatever... mine was the hood switch that was flakey.. (nt) - larryd740il as sdmike 2008-03-14 18:09:00 (325 views)
  • ditto those below...if you've disabled the motion & TILT sensor...and it still (pic) - Q 2008-03-14 11:52:35 (2860 views)
    • i wasn't aware a double press also deactivated the tilt sensor (nt) - ian 2008-03-14 21:29:05 (334 views)
      • duh, nevermind. i know i know...check the manual! (nt) - ian 2008-03-14 21:32:34 (262 views)
        • Hahaha...I love it...here's the info from owners manual...for good measure...8-) (pic) - Q 2008-03-14 23:53:51 (385 views)
  • a double press only deactivates the motion sensor. you may need a new incline (url) - ian 2008-03-13 23:53:19 (286 views)
  • Have you tried looking at the hood switch sensor. It is - hypercritic 2008-03-13 23:51:30 (326 views)
    • +1 - bsnedeker 2008-03-14 09:18:54 (153 views)
  • Don't the 2001's all have the newer ultrasonic sensor in the headliner? - DavidC 2008-03-13 23:13:07 (261 views)
    • lol trust me its the HOOD SENSOR - snitch740i 2008-03-14 04:14:37 (428 views)
      • I had the same issue on the 1999, I figured the ultrasonic sensor - 04sshd 2008-03-14 12:05:47 (322 views)