1995 E36 316i - Battery goes flat very quickly when car is left for short while even though it is new

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Thread: 1995 E36 316i - Battery goes flat very quickly when car is left for short while even though it is new

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  1. 1995 E36 316i - Battery goes flat very quickly when car is left for short while even though it is new 
    #1
    Bimmer Fan
    Car Details
    Jim Havell's Car Details
    Model of Car:
    316i
    Year of Manufacture:
    1995
    Transmission Type:
    manual
    Car Body Type:
    saloon

    Join Date
    Sep 2010
    Location
    West Sussex
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    When the car is left for even short periods of time, say 3 - 4 days, the battery goes flat. I have tried leaving it with the alarm activated or de-activated and it makes no difference. This is a 1995 316i. could it be the analogue clock?
     
     

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    #2
    BMW Crazed
    Car Details
    surestart's Car Details
    Model of Car:
    e36 m3
    Year of Manufacture:
    2000
    Transmission Type:
    manual
    Car Body Type:
    convertible
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    Aug 2009
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    Check for a boot light staying on. Another thing to check when the engine is cold put your hand on the alternator, if it is warm it could be the culprit.
     
     

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    #3
    BMW Guru
    Car Details
    E36Coupe328's Car Details
    Model of Car:
    328 + 325
    Year of Manufacture:
    1995 + 1994
    Transmission Type:
    Manual
    Car Body Type:
    Coupe
    E36Coupe328's Avatar
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    Jul 2010
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    UK
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    How many amps is your battery and what is the Amp hour rating?

    Divide the amp hour rating by the number of hours it takes to go flat to get a rough "how many amps must be drawing" (if the battery was full)

    If the amp range and fuse in the meter doesn't exceed this number (by design) no point trying or the internal fuse / meter will fry.

    If the battery is new and not lasting then either
    1) Large current drain (really large is unlikely)
    2) Check all connectors and earth leads to battery / engine and including alternator AND ancilliary drive belt for alternator because if the battery is good and no drain it isn't being charged.
    3) Bad alternator
    4) You do that much stop start driving it never gets time to put the charge back

    What has changed recently? Any big ICE installs?

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