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E90 M3 (Sedan) | E92 M3 (Coupe) | E93 M3 (Convertible) (2008-2013) {Engine: S65 - Max Hp: 414 hp (420 hp Euro) at 8,300 rpm / 295 lb/ft at 3,900 rpm}


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Old Fri, Nov-25-2016, 05:59:50 PM   #1
mmerlina
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Default Very poor key reception (video evidence!)

Hey guys, first things first -- I have 2 wireless keys, I've put brand new batteries in both of them, and they both do the same thing.

I have extremely low reception when it comes to the keys. In order to unlock the doors or pop the trunk I basically need to be on top of the vehicle. In order to start the car, I need to take them out of my pocket and get them close to the button.

The video explains it all.. I apologize it's kind of shaky. If you turn your sound up you can hear me clicking the buttons on the key, and pushing the start button a couple times. I put a couple annotations in there too.

Anyone have any ideas on what could cause this?

Thanks everyone.

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Old Sat, Nov-26-2016, 10:34:30 PM   #2
nashvegas
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Default Re: Very poor key reception (video evidence!)

That's not normal. I have a PDF of the whole Comfort Access system which I tried to upload here (no dice) -- which pretty thoroughly explains the e90 series Comfort Access system, looks like there are 6 antennas.

For a 2013, you should still be under warranty right? this would def be covered.

I'll try to PM it to you.

Last edited by nashvegas; Sat, Nov-26-2016 at 10:39:25 PM.
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Old Wed, Nov-30-2016, 12:58:00 PM   #3
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Default Re: Very poor key reception (video evidence!)

Mine is pretty bad as well. In for answers!

When I'm in the car it will turn on the car from my pocket though
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Old Wed, Jan-04-2017, 02:03:04 AM   #4
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Default Re: Very poor key reception (video evidence!)

I've got the same issue. Works fine inside the car but for the trunk I actually have to lift my knee up to get the key closer to the button. In for a fix if anyone finds one!
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Old Wed, Jan-04-2017, 05:36:33 PM   #5
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Default Re: Very poor key reception (video evidence!)

I haven't tried removing the back window tint yet.. the last time I was at the dealer that's what they told me it was. So until I at least try that, I can't really hold their feet to the fire.

Do you guys have tint on your rear windshield? The previous owner of my car was big into speed detection/jamming because he spent a lot of money installing a remote control flip up/down license plate and an expensive detection system. I read online that certain metallic tints are known to throw off radar detection, so I'm under the assumption he did that also? I don't really know how to test for it.

Not really looking forward to removing the tint and potentially ruining the defroster/antenna in the process, which is why it isn't done yet.
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Old Thu, Jan-12-2017, 01:20:32 AM   #6
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Default Re: Very poor key reception (video evidence!)

I have tint, have not removed it. But iirc the metallic tint you're referring to is rarely used and hard to come by now a days. So I don't think that is the issue
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Old Thu, Jan-12-2017, 02:39:17 PM   #7
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Default Re: Very poor key reception (video evidence!)

Quote:
Originally Posted by Jonzny View Post
I have tint, have not removed it. But iirc the metallic tint you're referring to is rarely used and hard to come by now a days. So I don't think that is the issue
Thank you for the response. The only reason I thought it was done was because the PO went through a lot of effort to install many "anti-radar" devices, so I was figuring he went out of his way to find that tint with the metallic properties.

Do you know if there is a way to test the tint to see if it's metallic? Is it conductive, can I test for continuity?

I'd just hate to go through the efforts of tearing it off, risk ruining the rear defroster and having to replace the rear glass, all for nothing.. which is why I haven't done anything yet.
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Old Thu, Jan-19-2017, 05:50:33 AM   #8
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Default Re: Very poor key reception (video evidence!)

Quote:
Originally Posted by mmerlina View Post
Hey guys, first things first -- I have 2 wireless keys, I've put brand new batteries in both of them, and they both do the same thing.

I have extremely low reception when it comes to the keys. In order to unlock the doors or pop the trunk I basically need to be on top of the vehicle. In order to start the car, I need to take them out of my pocket and get them close to the button.

The video explains it all.. I apologize it's kind of shaky. If you turn your sound up you can hear me clicking the buttons on the key, and pushing the start button a couple times. I put a couple annotations in there too.

Anyone have any ideas on what could cause this?

Thanks everyone.

https://youtu.be/poWd2tcImdQ
Not sure if anyone's ever told you this, but that's a nice M3.

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Discussing Very poor key reception (video evidence!) in the E90 M3 (Sedan) | E92 M3 (Coupe) | E93 M3 (Convertible) (2008-2013) Forum - {Engine: S65 - Max Hp: 414 hp (420 hp Euro) at 8,300 rpm / 295 lb/ft at 3,900 rpm} at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)