Missing sensor of just never there?

Discussion in '3 Series' started by Wynne71, Nov 18, 2019.

  1. Wynne71
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    All the cars I’ve had in recent memory, right back to a 1986 Saab 900i, have had a low washer fluid warning. On the M40 today and the fluid ran out, annoying.
    Is this not a thing on the 3 series? Even the wife’s previous 2005 Mini One had a low warning message!

    Seems to be a daft thing to not have.
     
  2. Peter
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    Peter WARLORD Site Supporter

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    All BMW models I've owned, or have needed to refill, have had a low level warning. Get the warning 'bong' and icon on the display. I suggest there is a fault of some sort.

    Peter
     
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  3. Wynne71
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    I did think there should have been a warning. Put four litres in, so was definitely empty.

    The fluid bottle is buried in the engine bay, so will need to have a look in the light.
     
  4. Mieke
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    Mieke WARLORD Site Supporter

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    Maybe the connector has become unplugged, or new level sensor required?
     
  5. markyboyt
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    markyboyt

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    It’s buried behind the wing so you’re gonna need some tools rather than just light. Arch liner off, side repeater out and then it’s a 10mm holding the bottle in.
     
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  6. Wynne71
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    Thanks.

    Does look like I need to have a closer look. The pressure from the jets has dropped off massively. First squirt is ok, then it becomes a dribble. Possibly pulled muck from the bottom of the bottle into a filter or into the jets.
     
  7. Wynne71
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    I've read a few "how to" guides, looks like a proper PITA to do, but seems that the small filter can get clogged, causing a lack of flow.
    Do I buy the new filter or is the old one easily cleanable?
     
  8. snrbrtsn
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    I’d almost guarantee the pump suction filter is plugged
    The only method of cleaning is removal of tank as per instructions above - very common more so when screenwash types are mixed

    Remove pump and filter, run under warm tap and gently clean with your wife’s toothbrush
     
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  9. Wynne71
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    Sound advice!
     
  10. Wynne71
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    Long trip tomorrow and Thursday, will see if the pressure gets worse. Need to find a time when it’s light and dry to do the job. Looks to be a 2 hour round job all in.
    What a daft place to put the thing!!
     
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  11. Alan Gunn
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    Alan Gunn

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    When i first got my e90 well shortly after getting it my washers just stopped but no low fluid light.
    Filled it up but didn't take as much as i expected.
    Got in the car and pulled the stalk and only a dribble came out.
    You will find the tank has got a load of black slime/gunge stuff in it.
    I tried all sorts of detergents to shift it but kept getting blocked.
    Ended up (as it was easier and quicker) buying a second hand washer tank of the bay and cleaning that one out then it was just a case of the garage doing a swap.
    It is the biggest pain in the @ss i have ever come across with a washer system but i now have fantastic washers lol.
     
  12. Mieke
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    This is one reason that I use only high quality washer fluid at the correct concentration (BMW screen wash).
    Cheap alternatives go "OFF" in the reservoir forming a black algae sludge. So it's false economy IMO.
     
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  13. Wynne71
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    Definitely not working properly. Will have to brave it and clean the bottle/filter out.
     
  14. Alan Gunn
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    Alan Gunn

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    I went as far as to putting Drain cleaner in mine and that didn't clear it.
    Also i disconnected the pipe to the screen and extended it so any detergent i put in was pumped out and into a 5Ltr can on the floor in case it went on the paintwork.
    Have a google as if it's not that bad yet sterident has been known to work but a whole tube left over night didn't work for me.
     
  15. markyboyt
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    markyboyt

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    It's not that bad, just not as easy as some. If you can jack the drivers front up and take the wheel off that will make it a lot easier, then its just remove the arch lining, bolt out and a bit of fettling and you will have it out, some catch the repeater and some don't. If it does pull the bottle to put pressure on the repeater which will make it push out slightly so you can grab it then slide it against the metal spring clip and the other end will come free.
     
  16. Wynne71
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    Got back while there was a little light out so had a rummage around. Didn’t have time to take the inner wing out etc, but took the brake fluid cover off to see if I could unplug the pipe supplying the washers from the bottle. Limited flow from the pipe, I blew down the pipe and the bottle bubbles, did this for a couple of goes. Hoping to dislodge whatever Friday had built up. Put the pipe back on and there is a slightly better flow now.
    Oddly the headlight washers work perfectly, full pressure. There must be two supplies from the same bottle and the windscreen one is semi blocked.
     

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