Question about 2003 BMW 325

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I have a BMW 325 I and the fluid light always on even though I have a full gas tank. The meter that measure the gas stays at the last qurater if the tank. What is wrong with it. Anyone knows please help. Thanks.

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  • BMW Master
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You have a defective fuel level sending unit. To replace this you must remove the gas tank from the car.

Posted on Feb 25, 2012

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Posted on Jan 02, 2017

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SOURCE: HOW DO YOU CHECK THE TRANSMISSION FLUID LEVEL ON A

in park idling

Posted on Apr 14, 2009

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I know E46's use ATF (Automatic Transmission Fluids) for their power-steering systems. BMW Reccomends to use a common Dextron III / Mercon Automatic Transmission Fluid.

Posted on Dec 23, 2009

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SOURCE: how do i check transmission fluid on my 1987 bmw

Its a dealership thing. Requires a dealership mechanic to even check it. Sealed transmission.
Hope this helps.

Posted on Feb 03, 2010

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How do i measure amount of fuel in tank when fuel gauge is not working


Suggest you take this to certified mechanic as you have to remove the tank to get to a float that controls your gauge. Any other method of measuring is dangerous. There is the mileage method where you keep track of of the mileage you have driven on a log sheet. That is old fashioned gas gauge though.

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The sensor is part of the fuel pump module inside the gas tank.
The signal is sent to the body computer, so it could be a faulty module or a problem with the body computer.
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Your ECU could be fouling up, Could have a short or ground, gas sending unit could be malfunctioning, Autozone can put a ECU checker on your system and it should indicate possible causes

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My car stoped running as if it were running out of gas but i have gas in it now it will only crank but not start it is a 92 BMW 320i


Has the fuel filter ever been replaced? Instructions are here. http://www.frontiernet.net/~papi/Filter.html
This car has two gas tanks, one on either side of the spare. The fuel pump that delivers fuel to the engine is on the right-hand side. When the left tank is less than half full, it requires a transfer pump to move the rest of the fuel over to the tank with the fuel delivery pump.
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Wont take gas and the gas gauge stays full? This question really doesn't make sense. But if you cant put anymore gas in the car and the gauge says full then you have a full tank of gas. If the gauge always says full even when the gas tank is not full then the sender unit is failing or the gauge itself.

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Gas light stays on even when tank is full


the float sensor attahced to your fuel pump sounds as though it is not working properly. Usually this occurs when the car rides on E many times and becomes damaged. depending on the model it may be necessary to replaced the sensor assembly or if it is the complete unit the whole fuel pump.

Also, depending on your driving habits your car can use more gas if your are driving in traffic (stop and go). Average out your fuel mileage by filling up a few times and keeping a log of the gas consumed. Do this by reseting the trip meter when you fill up and when you fill up again divide the total mileage on your trip meter by the amount of gas you used by getting the amount of gallons it took to fill up again. ex. 360miles divided by 10gals = 36 miles per gallon.

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Those vehicles have to sending units. Your fuel signal is buferred ( calculate) so it takes both signals to make your gauge accurate. sounds like one them is out of range causing your gauge to read icorrect. You do need to take to your nearest BMW shop, so it can be properly diagnose.

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the only problem is the floater of your gas tank.It is easy to be fixed all you need to do is to take the back seat off and you will going to see the upper portion of your gas tank there's a circular or square portion plate that have a 4 bolt's on it and a electrical wire just loose the bolt's and pull the floater up, then you will see there it's electrical mechanism just clean it by using a sand paper to clean the bronze part then turn on the key switch, move the floater up and down check the gas gauge. it is not pricey though if you want it to be fixed by a mechanic.

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