2004 E46 320 parking sensor intermittent issue

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  1. 2004 E46 320 parking sensor intermittent issue 
    #1
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    Jamesabennett's Car Details
    Model of Car:
    320cd
    Year of Manufacture:
    2004
    Transmission Type:
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    Coupe

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    Hi everyone,

    I have a intermittent issue with my e46 coupe parking sensors (54 plate)

    When I get in the car first thing they work perfectly. However if I drive for more than 5 minutes, the next time I put it in reverse the jam on solidly as if I am next to a obstacle of some sort. As far as I can tell they all click when the car is in reverse and work when the car is cold. My next step is to buy one new sensor and swap out one at a time until I figure out which one if any is faulty, but I can't help but think it might be something getting hot and shorting out the sensors. Interestingly if I leave the car off for 5 mins or so when I get back in it goes away, but comes back again after driving for 5 mins.

    Any help / advice or anyone else who has seen this problem and knows a fix would be a great help!!

    Cheers all and happy driving

    James
     
     

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  3. E46 parking sensor intermittent issue 
    #2
    BMW Guru
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    lee_h's Car Details
    Model of Car:
    318 ci
    Year of Manufacture:
    2000
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    manual
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    coupe
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    Try cleaning them with some wd40 before you buy one and start switching them around
     
     

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    #3
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    Jamesabennett's Car Details
    Model of Car:
    320cd
    Year of Manufacture:
    2004
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    Car Body Type:
    Coupe

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    Thanks for the quick response Lee. I am presuming you mean wd40 the connectors behind the bumper? Are they easy to get too or does it involve removing the bumper?

    My next stop is to buy a Haynes manual !!
     
     

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    #4
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    sam1832's Car Details
    Model of Car:
    318ci
    Year of Manufacture:
    2004
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    manual
    Car Body Type:
    convertable Msport
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    there is a guide in my sig, to removing the bumper

    he means WD40 the sensor, as the sensors get mositure in them and they stop working .... it sometimes helps but is not a perminant fix

    I would take the bumper off like you said, as your problem is related to the car being warm i would guess at the wireing or the sensor above the exhaust pipe

    the wireing for that sensor is known to melt

    good luck
     
     

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    #5
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    Jamesabennett's Car Details
    Model of Car:
    320cd
    Year of Manufacture:
    2004
    Transmission Type:
    Manual
    Car Body Type:
    Coupe

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    Bournemouth
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    Thanks sam. Thats really helpful

    James
     
     

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