Quote:
Originally Posted by BigBody
Every '06 ive heard has a more modern chirp. Id love to do the retrofit, but it seems as there is zero information available regarding the chirps. Can anyone confirm which horn exactly is making the noise? If the alarm is the same horn, and it can generate a range of frequencies, i wouldn't be surprised if it was just a simple software adjustment...
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The audible alert for lock/unlock is made by the same alarm siren if someone was to break into your vehicle while it is armed. I've never heard any e53 have a different audible alert when locking/unlocking. In fact, the e53 sounds like its generational cousins (e38/e39/e46). The only exception is the early e38 and e39 which had the wolf whistle alert. It sounded something like
"a-wee-a-wheet" when locking...and
"a-wheet" when unlocking. Around the 1998-99 model year...BMW changed it to the road runner sounding alerts that sounds more like
"beep-beep" for locking and
"beep" for unlocking. Which is what most e38/e39/e46/e53 owners recognize.
Perhaps a previous owner swapped in one of the early e38/e39 wolf whistle alarm sirens. I believe the electrical harness is the same for all of the aforementioned models...so it could probably be an easy swap in just to change things up.
Personally I hated the wolf whistle so much on my 97 e38...that I actually paid money (back then) to the dealer to deactivate the audible alerts.
And as mentioned above...the audible and visual alerts for lock/unlock can be coded off or on in various ways...see info below about
arm/disarm acknowledgments.