Extreme heat causes the horn to honk???

bimmerfrog · 08-04-2023, 04:53 PM

Here's an odd one. My wife has reported this a few times. Normally, the car is garaged but after extended periods of time in Texas sun, the car will honk 5-15 times before the car cools down. Anyone heard of this before? Thanks

GotBeemed · 08-04-2023, 07:05 PM

Thats German for, GET ME THE FUCK OUT THE SUN, COWBOY!!!!!

Qsilver7 · 08-12-2023, 06:37 PM

Need more details…but is the vehicles locked? Asking because that would activate the DWA (anti-theft alarm siren system)…and if for some reason the battery discharged low enough…that could case the alarm to go off…due to the system thinking the drop in voltage was a theft attempt.

So that asks the question, is alarm system activated, and is there anything draining the vehicle’s battery…like pre-ventilation being activated to cool down the interior? Or is there any add on equipment like a dash cam that could be draining the battery. High ambient temps are just as harsh to the vehicle’s battery as extreme cold temps.

bimmerfrog · 08-17-2023, 08:03 PM

Good questions. The vehicle is locked while it's sitting there. There's no aftermarket accessories. Pre-ventilation is off.

I don't believe I was clear on the fact the honking occurs as she's driving the car. 5-15 honks until the car interior cools down.

08-04-2023, 04:53 PM	#1
bimmerfrog New Member 41 Rep 21 Posts Drives: 2021 X5MC Join Date: Jul 2021 Location: Dallas iTrader: (0)	Extreme heat causes the horn to honk??? Here's an odd one. My wife has reported this a few times. Normally, the car is garaged but after extended periods of time in Texas sun, the car will honk 5-15 times before the car cools down. Anyone heard of this before? Thanks
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08-04-2023, 07:05 PM	#2
GotBeemed Lieutenant 416 Rep 434 Posts Drives: 997 911, F95 X5M Competition Join Date: Jun 2021 Location: MD iTrader: (1)	Thats German for, GET ME THE FUCK OUT THE SUN, COWBOY!!!!!
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08-12-2023, 06:37 PM	#3
Qsilver7 Major General 4504 Rep 7,548 Posts Drives: F06 650ix GC / F15 X5 50i Join Date: Oct 2016 Location: Indiana, USA iTrader: (0)	Need more details…but is the vehicles locked? Asking because that would activate the DWA (anti-theft alarm siren system)…and if for some reason the battery discharged low enough…that could case the alarm to go off…due to the system thinking the drop in voltage was a theft attempt. So that asks the question, is alarm system activated, and is there anything draining the vehicle’s battery…like pre-ventilation being activated to cool down the interior? Or is there any add on equipment like a dash cam that could be draining the battery. High ambient temps are just as harsh to the vehicle’s battery as extreme cold temps. __________________ 2015 F06 650ix Gran Coupe`(Moonstone/Cohiba Brown)\| 2014 F15 X5 50i MSport (Space Gray/Mocha) Become a BMW CCA member! Click HERE to join and feel free to use my BMW CCA member #191509 as a referral.
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08-17-2023, 08:03 PM	#4
bimmerfrog New Member 41 Rep 21 Posts Drives: 2021 X5MC Join Date: Jul 2021 Location: Dallas iTrader: (0)	Good questions. The vehicle is locked while it's sitting there. There's no aftermarket accessories. Pre-ventilation is off. I don't believe I was clear on the fact the honking occurs as she's driving the car. 5-15 honks until the car interior cools down.
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