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Thread: '00 323Ci radiator light comes on sometimes

  1. #1
    Join Date
    Jan 2018
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    Sachse, TX
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    several

    '00 323Ci radiator light comes on sometimes

    See attached. Not sure if this is saying my thermostat is going out or low coolant. It goes away soon after starting. Does not always come on. Temperature gauge goes to about the middle when warmed up and stays there. Just replaced the radiator not long ago. Replaced upper and lower hoses also. What do you think this light means?

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    Jeremy
    2000 323Ci Titansilber Metallic cabriolet

  2. #2
    Join Date
    Nov 2013
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    Westlake,La
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    My Cars
    1994 E34 530i
    Coolant could be a little low, or the sensor in the coolant reservior may be going bad

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  3. #3
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    Quote Originally Posted by Ernie D View Post
    Coolant could be a little low, or the sensor in the coolant reservior may be going bad

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    Thank you!

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    Jeremy
    2000 323Ci Titansilber Metallic cabriolet

  4. #4
    Join Date
    Jan 2016
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    Ca
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    2001 525it
    And fix your right headlight or turn signal bulb, the bulb out indicator is on

  5. #5
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    Quote Originally Posted by jclausen View Post
    And fix your right headlight or turn signal bulb, the bulb out indicator is on
    Yes. The bulb is fine. I think it is the socket itself or something more fun I need to trace down.

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    Jeremy
    2000 323Ci Titansilber Metallic cabriolet

  6. #6
    Join Date
    Feb 2013
    Location
    Lynnwood, WA
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    47
    My Cars
    02 325i
    I replaced my expansion tank and the indicator light comes on randomely. The sensor that came with the tank kept light on all the time. I reinstalled the original and now only sporadic.

  7. #7
    Join Date
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    EXOTICS
    Try bleeding the system,
    if still sporadic,replace with BMW Genuine sensor.
    "It's not how you race your car, it's how you stand by your car, you better learn that".
    Edited version

  8. #8
    Join Date
    Mar 2018
    Location
    West Warwick, RI
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    26
    My Cars
    2002 BMW 325xi
    Quote Originally Posted by jclausen View Post
    And fix your right headlight or turn signal bulb, the bulb out indicator is on
    My 325xi has this issue with 3 of its lights. Both headlights and one taillight. The PO put in new HID's and angel eyes and I doubt he wired them correctly because the "bulb out" light on the dash is always on, but the headlights work fine. As for the taillight, I noticed that the rear brake light on the side that the dash indicates, lights up in the wrong spot. I doubt physically placing the bulb in a wrong spot would cause the computer to think it's out unless the PO put the bulb in the wrong socket. It's a bit of a mystery to me, and I know nothing about electrical or wiring apart from PC's (I'm a computer nerd; not an electrical nerd/mechanic). Any ideas on what I can do?

  9. #9
    Join Date
    Jan 2018
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    Sachse, TX
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    several
    Temperature stays good. Light goes off after it warms up. Where is the sensor located?

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    Jeremy
    2000 323Ci Titansilber Metallic cabriolet

  10. #10
    Join Date
    Apr 2016
    Location
    Philadelphia
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    My Cars
    1997 m3
    Its located on the bottom of your expansion tank. I would check coolant level before a cold start. That's when the system is at its lowest.
    pic10.jpg

  11. #11
    Join Date
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    Quote Originally Posted by Ateyourv8 View Post
    Its located on the bottom of your expansion tank. I would check coolant level before a cold start. That's when the system is at its lowest.
    pic10.jpg
    Check it in the reservoir? I need to replace my cap.

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    Jeremy
    2000 323Ci Titansilber Metallic cabriolet

  12. #12
    Join Date
    Jun 2017
    Location
    Texas, USA
    Posts
    223
    My Cars
    '04 BMW 325 Ci blk cpe
    when my temp/rad light came on after I started using the heater, it was that there was air trapped in the heater core and as soon as I turned the heat to full blast and bled the system I no longer got that annoying random rad/temp light flicker...so do a rad bleed/refill and you should be fine. god luck

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