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Thread: E46 Automatic headlight sensitivity

  1. #1
    Join Date
    Dec 2007
    Location
    Spain
    Posts
    638
    My Cars
    2003 330ci

    E46 Automatic headlight sensitivity

    Hey there, I was playing around today and I retrofitted automatic headlights and wipers. Everything seems to be working fine, although I have a question about the sensitivity of the headlights.

    Earlier today I went for a drive and the headlights turned off as it was midday and sunny out, as I entered the garage they turned on again as expected.

    I went out again this evening, the sun was low in the sky but it was still bright out. The lights turned off as I exited the garage but turned on again shortly after. I parked, turned the car off and set off again, the lights came on about 10 seconds after driving.
    The thing is, nobody had their lights on at this time as visibility was still high. I have read that for some BMW models they turn on when the sun is low for extra visibility, is this true of the E46?

    I would like to know if this behavior is normal, or if it could be to do with my retrofit. I could probably make my DIY black windscreen frit better, and there is a small air bubble where the lens attaches to the windscreen (although the bubble should affect the rain sensing more than light). If the behavior is normal I'll leave it as it is.

    Penis,
    Rob.

  2. #2
    Join Date
    Aug 2015
    Location
    Cologne, MN
    Posts
    606
    My Cars
    03 M3 00 740i 98 528i
    Mine are pretty sensitive on my M3 pretty much just as you describe.... so I would be inclined to say that it's a normal operation.
    2000 740i - 149K - Dville Monsoon rear deck speaker upgrade, GROM audio Bluetooth
    1998 528i - 204K - GROM audio Bluetooth setup, Drilled/Slotted Rotors, BSW Stage One speaker kit, Facelift Xenon's with Angel Eyes
    2003 M3 - 210K - BMW Euro Cross Drilled Rotors

  3. #3
    Join Date
    Sep 2012
    Location
    El Paso Del Norte, TX, US
    Posts
    438
    My Cars
    ‘15 F31d Msport
    Yeah, they turn on between 4-5pm amd don't turn off till about 9am morning. No one has ever found an adjustment in the coding.
    If I were to give my Touring a first name, I'd probably name it "Alan".
    Mostly because I like puns.
    Mutual Admiration Society #5

  4. #4
    Join Date
    Dec 2007
    Location
    Spain
    Posts
    638
    My Cars
    2003 330ci
    Ok thanks guys, good to know. At least now I can assume that my retrofit went smoothly.

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