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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 05-02-2013, 05:18 PM
TXFred TXFred is offline
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Mein Auto: 2008 335i Convertible
Is there a way to lock the key inside the car?

My car is a 2008 E93 with comfort access.

Short version: I need a way to deliberately lock a key fob inside my car.

Long version: The car is at the body shop, but will be ready on Monday. They close at the same time that I get off work, so they wanted to know if they could lock the fob in the car and I could show up with my spare fob to collect the car later in the evening.

I'm OK with doing that, but I don't think it's possible for them to lock the key fob inside the car. As far as I know, the car will detect that the fob is in the car, and refuse to lock.

Is there another way to do this? The only way I can think of is to lock the car with the trunk still open, remove the battery from the fob, and then put the fob in the trunk and shut the trunk. But I have no idea if that will work.

Any suggestions?
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  #2  
Old 05-02-2013, 05:22 PM
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Thunder Dump Thunder Dump is offline
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Mein Auto: '09 328i E93 SGM/CR
You can always lock the fob inside the car--there is no mechanism to prevent this. You *can't* lock it inside the trunk. Just leave it in the center console, press the lock button on the center dash and close the door.
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Old 05-02-2013, 05:26 PM
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GarySL GarySL is offline
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Or lock the doors with the remote with a door open & put the fob back inside. Close the door.

I do it when I may get soaked, so I retain the surfer's (valet) key to allow later access to the locked car & the fob.
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  #4  
Old 05-02-2013, 05:33 PM
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Zooks527 Zooks527 is offline
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Quote:
Originally Posted by Thunder Dump View Post
You can always lock the fob inside the car--there is no mechanism to prevent this. You *can't* lock it inside the trunk. Just leave it in the center console, press the lock button on the center dash and close the door.
Nope, at least not on my 2009 without CA. If either door is open, the center dash lock button is disabled, as is the fob lock button.

You can, however, do the following on my car:
1 ) Lock the key in the trunk.
- or -
2 ) Close the driver's door, open the passenger's door, lock the doors with the button on the fob, put the key inside and close the passenger's door.


EDIT: Nevermind. Re-reading shows the OP has CA.
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Last edited by Zooks527; 05-02-2013 at 05:35 PM.
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  #5  
Old 05-02-2013, 07:26 PM
pmcu pmcu is offline
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Lock the car with the windows down, press and hold the bmw emblem to roll up the window, while that is happening, quickly toss the key in the car before the windows are fully closed.

Maybe the shop can wrap it in a towel or something so it's not visible from the outside.
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  #6  
Old 05-02-2013, 09:06 PM
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Dwight_Schrute Dwight_Schrute is offline
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If the OP finds a way to successfully lock his key in the car and has CA, won't someone be able to unlock it by just walking up and grabbing the door handle?

I ask because I had the same problem with my girlfriend's RR Sport. Couldn't even hide it outside the car if it was too close to any of the doors as the sensor picked it up and would unlock it if you came up and grabbed the handle. Ended up hiding it behind the front license plate.

Sometimes cars are too smart.
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  #7  
Old 05-03-2013, 02:11 PM
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GarySL GarySL is offline
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Quote:
Originally Posted by Dwight_Schrute View Post
If the OP finds a way to successfully lock his key in the car and has CA, won't someone be able to unlock it by just walking up and grabbing the door handle?
No CA functions won't work, even with the key locked inside. That's why you take the valet key with you to the pool or river, as it won't get harmed being soaked. And the remote remains safely inside waiting your return.
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  #8  
Old 05-03-2013, 02:28 PM
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tturedraider tturedraider is offline
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Quote:
Originally Posted by TXFred View Post
My car is a 2008 E93 with comfort access.

Short version: I need a way to deliberately lock a key fob inside my car.

Long version: The car is at the body shop, but will be ready on Monday. They close at the same time that I get off work, so they wanted to know if they could lock the fob in the car and I could show up with my spare fob to collect the car later in the evening.

I'm OK with doing that, but I don't think it's possible for them to lock the key fob inside the car. As far as I know, the car will detect that the fob is in the car, and refuse to lock.

Is there another way to do this? The only way I can think of is to lock the car with the trunk still open, remove the battery from the fob, and then put the fob in the trunk and shut the trunk. But I have no idea if that will work.

Any suggestions?
This will work. And of all the posts here I think this method probably is the most logical.
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  #9  
Old 05-05-2013, 09:41 AM
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Thunder Dump Thunder Dump is offline
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Mein Auto: '09 328i E93 SGM/CR
My post above (and this one as well) ONLY apply to cars with CA since that's what I have so I can't speak with authority on non-CA cars. You absolutely can lock a key fob inside the car and the antennas inside the car are different than the ones outside the car and they serve different functions. This is for security purposes. Imagine you are trying to get away from an attacker and get in your car and want to lock yourself inside. You press the center lock or the lock on the fob and the doors lock. If the inside antennas read the fob is inside the car, the door will NOT unlock if the attacker tries to open the handle. The car recognizes that the lock request came from the inside and the unlock request is coming from the outside. Otherwise the attacker could simply open the door.

Alternately, just lock the fob inside the car with the valet key removed and use the valet key to lock and unlock the door.
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  #10  
Old 05-05-2013, 11:02 AM
ctuna ctuna is offline
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Put the fob in a metal box

Put the fob in a metal box
This blocks the radio waves. Look up Faraday cage.
Be sure you want to do this or have a spare key in your pocket
and test to make sure the box is good enough before doing this.

Wrap it in tin foil or if you have comfort access you could remove the battery.

Last edited by ctuna; 05-05-2013 at 11:06 AM.
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