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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Thu, Aug-10-2017, 03:27:43 AM   #1
lmtfi
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Default Does The E46 M3 Use More Power Parked Locked - or Unlocked?

And why?
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Old Thu, Aug-10-2017, 03:52:02 AM   #2
bimmerdriver
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Default Re: Does The E46 M3 Use More Power Parked Locked - or Unlocked?

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And why?
I'd speculate it makes no difference. There is power draw when locking or unlocking, but once the actuators are done, they should not be drawing power. The only way to prove this is by measuring current draw. I have a pwoer supply that measures current. When I get a chance, I'll take a look.
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Old Thu, Aug-10-2017, 04:07:10 AM   #3
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Default Re: Does The E46 M3 Use More Power Parked Locked - or Unlocked?

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And why?
Why? Why do you want to know? Going for green car of year?
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Old Thu, Aug-10-2017, 04:09:29 AM   #4
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Default Re: Does The E46 M3 Use More Power Parked Locked - or Unlocked?

My little Braille atv battery drains faster when locked because the alarm is armed
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Old Thu, Aug-10-2017, 04:09:45 AM   #5
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Default Re: Does The E46 M3 Use More Power Parked Locked - or Unlocked?

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Why? Why do you want to know? Going for green car of year?
I now have a small, lightweight battery in a track-only car that spends all of its non-track time parked in a garage.

Yes - I can put it on a trickle charger - but I generally don't prefer to do that 24x7. The answer has practical application.
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Old Thu, Aug-10-2017, 04:55:48 AM   #6
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Default Re: Does The E46 M3 Use More Power Parked Locked - or Unlocked?

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I now have a small, lightweight battery in a track-only car that spends all of its non-track time parked in a garage.

Yes - I can put it on a trickle charger - but I generally don't prefer to do that 24x7. The answer has practical application.
Hmm. Guess I figure it would be negligible difference unless the alarm was armed.
Only thing I can add to that is the car seems to go to sleep the same no matter if the doors are locked or not.
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Old Thu, Aug-10-2017, 04:57:07 AM   #7
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Default Re: Does The E46 M3 Use More Power Parked Locked - or Unlocked?

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My little Braille atv battery drains faster when locked because the alarm is armed
That was my guess.
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Old Thu, Aug-10-2017, 07:31:04 AM   #8
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Default Re: Does The E46 M3 Use More Power Parked Locked - or Unlocked?

I'm not positive on the E46 cars but I do know that newer cars do go to sleep when locked. Thus they use less electric.
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Old Thu, Aug-10-2017, 01:47:21 PM   #9
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Default Re: Does The E46 M3 Use More Power Parked Locked - or Unlocked?

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I'm not positive on the E46 cars but I do know that newer cars do go to sleep when locked. Thus they use less electric.
E46s go to sleep after ~15 mins regardless. And I think they can be coded to make that timer shorter
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Old Thu, Aug-10-2017, 01:51:57 PM   #10
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Default Re: Does The E46 M3 Use More Power Parked Locked - or Unlocked?

I dont believe the issue is the current draw from the car itself, more how well the battery holds a charge over time with out using it. i believe the latter would cause more of an issue than the former keeping in mind a battery sitting not being used will slowly die and become less able to hold a charge, this is the actual reason to keep the battery on a tender/trickle charger to keep the cells alive and functioning

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Discussing Does The E46 M3 Use More Power Parked Locked - or Unlocked? in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)