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Thread: Remote lock/unlock issues.

  1. #1
    Join Date
    Nov 2018
    Location
    Sweden
    Posts
    60
    My Cars
    1994 840ci

    Remote lock/unlock issues.

    Hello. Having some issues with the remote for my e31. For some reason the range is very poor. I need to stand very close to the car each time I will lock/unlock , and It usually needs several tries before It works. Does anybody know the location of the antenna/reciver? Am I right in that this key is the 433Mhz and not the ir one?

  2. #2
    Join Date
    May 2009
    Location
    UK/Birmingham
    Posts
    353
    My Cars
    Bmw 540i Sport
    I have the same
    I stay next to the car hold bottom for 2sec and let go 0.5 sec later car unlock same when locking. That way I don't have to try few time...I think we need to buy new key
    I'm sure mine is 25 years old



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  3. #3
    Join Date
    May 2010
    Location
    Los Angeles
    Posts
    817
    My Cars
    94 Euro BMW 850CSi 892
    Very common problem. Very frustrating. Pretty much ALL E31s I've owned have had this issue in one way or another.
    Board Member of SoCalEights (Marketing, Web Development & Social Media), Vice President: BMWCCA/E31 Chapter, www.cartiologyfilms.com
    Current E31s:
    1997 BMW 840Ci Black on Beige. CSI 62, 107 and 16. Euro-CSi #892.
    Client Represented E31s (Cartiology Films)
    1994 BMW 850CSi #11 USA, 1994 BMW 850CSi #31 USA, 1994 BMW 850CSi #58 USA
    93-850Ci - manual 6 speed. 97-850Ci - M73 Steptronic. 94-CSi 125, 95-CSi 162 Daytona Violet, CSi 198 White on Red
    Past E31s:
    1991 BMW 850i. Calypso Red on Beige Nappa and 1995 BMW 840Ci. Bright Red on Beige Nappa
    1997 BMW 840Ci. Black On Black Nappa, but changed to Dakar Yellow on Black Nappa and 1994 BMW 850CSi #27. Red On light Silver.
    1991 BMW 850i. Automatic. Red On Black and 1996 BMW 850Ci. Automatic. Midnight Blue on Gray.
    1994 BMW 850CSi. Black On Blak #107, Black/Black 97-840. White/White CSi. Silver/Silver 97-840

  4. #4
    Join Date
    Nov 2018
    Location
    Sweden
    Posts
    60
    My Cars
    1994 840ci
    Ok so it's quite common then. Still very irritating. Where is the antenna/reciver located, anybody knows?

  5. #5
    Join Date
    Sep 2008
    Location
    Santa Barbara
    Posts
    3,462
    My Cars
    91 Dinan860 & 91 850 6sp
    inside rear view mirror
    '91 Dinan 860 Stage III (new 6L engine)
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    '91 850i 6sp (mint) (sold)
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    ''73 3.0 csi, '08 535i, '03 X5 4.6is
    ...and a few other non BMW cars

  6. #6
    Join Date
    Nov 2018
    Location
    Sweden
    Posts
    60
    My Cars
    1994 840ci
    Thanks. I've seen that before but I thought that only applied to cars with ir.

  7. #7
    Join Date
    Jun 2012
    Location
    Woodstock, GA
    Posts
    566
    My Cars
    2001 BMW 540i6
    Yeah mine is like that too. Sometimes it’ll work normally and others it won’t at all. But usually if I stand close enough to unlock it manually it works. I tried swapping the key battery but didn’t change anything

  8. #8
    Join Date
    Feb 2010
    Location
    Hampshire UK
    Posts
    8,869
    My Cars
    99 840ci Sport Indv
    Mine had rotten range on one key - but excellent range on the other even though they both had new batteries. So, it is possible that the key is the problem rather than the receiver. And if that is the case there are loads of second-hand keys on Ebay and you could just swap the transponder over and re-program it to the alarm....
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


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