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2006 VW Jetta TDI

My fuel gauge seems to be reading about 1/8 to 1/4 of a tank too high at all times. After driving it about 100 miles, the tank still shows that it is full. The other night when I filled the tank up, I put in 10 gallons into the 14.5 gallon tank after it had showed that it was half full.

Basically, I am going by my trip odometer to know when to fill up, but it is still annoying. What do I probably need to replace? Is the fuel level sensor in the sending unit? How do I access the part? Any help would be appreciated.

Thanks.
 

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The sender unit is under the back seat on most of the vw's. Usually you just lift up the seat cushion and there's a black plate with 3 screws. You take that off and then disconnect the fuel lines and the wiring plug, unscrew the big ring and out it pops. That's what it's like on older vw's anyway. Being inaccurate seems to be fairly common, most often a good fill to the brim seems to sorts it out. Hopefully this helps. There might be more in the how to faq at the top of the page but I haven't checked myself.
 

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Being inaccurate seems to be fairly common
This is my first VW. But my family has had several. From my experience, VW fuel gauges have been EXTREMELY accurate. Basically, if the low fuel light comes on, you better fill up because you are almost out of gas.

I really want to get a full tank run on my car and see if I can break 600 miles. But I am not very confident right now with how much fuel I have remaining.

Thanks for the info on the location of the sending unit. Can anyone confirm that this is what I need to replace? I don't want to start taking stuff apart until I have a better idea of what needs to be replaced.
 

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mine inaccurate also at times

If I fill up, and top it off more, the gauge registers full and then at some point id say sometime within a half hour i'll look down and it'll be on empty. The mfd will not show a range either. I have to pull over, turn off the car and start it again and its fine. This only happens when i topped off on a long drive (you know, its not good enough that I can get 650 miles on a tank, I need to squeeze a few more!)
 

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Mine ran out when it said a quarter tank and I know quite a few friends with vw's and the majority have had a faulty reading at one time or another petrol and diesel. That's why I figured it was a common fault.:eek:
 
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