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  #31  
Old 07-27-2016, 10:52 AM
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i fixed this issue yesterday on an inventory vehicle at work

I found multiple fixes for this yesterday. I am a Nissan Master technician and work for a dealership. Yesterday we had an X5 with a check engine light on for the temp sensor malfunction inside of the active tank. I data monitored this issue and found sensor showing 25 degrees constant and it was currently 89 degrees outside. I gathered enough information from this thread to go into the tank myself and find a solution. I cut the wires going to the temp sensor and wired in a 10k 1/2 watt resistor and now my temp sensor shows 77 degrees all the time and killed the check engine light. I drove the vehicle home last night and back to work this morning and still no light. now I realize this fix wont hold up for when cold weather comes along, so I dug deeper to find a permanent fix. I found 2 options that work. I found that a standard fuel tank temp sensor from any of our Nissan vehicles will send the correct resistance value and is safe to drop inside of the active tank to correctly relay the right temp. option number 2 is slightly more costly, but it will fix this problem with a FACTORY style fix. I was unable to find a cheap BMW tank insert, so I got manufacturer names and sought the same part for other brand vehicles and hit gold on VW. here is a link to ebay for the part that matches the bmw part 100%

2007 2010 VW Volkswagen Touareg Heater Element for Urea Tank 7L6198970A | eBay

I hope this helps and I did photograph my adventure of fixing the tank with the 10k resistor.
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  #32  
Old 07-27-2016, 11:07 AM
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Does anybody have a wiring diagram? I have a wire that has become separated in the harness, my temp sensor read fine inside the tank but I have a short to positive code

All the fuses In the box under the air cleaner are fine
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  #33  
Old 07-27-2016, 11:19 AM
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go to google search and type in "bmw x5 active tank temp sensor wiring" the second picture is what I went off of. I have shopkey at work but the electrical diagrams for bmw are crap on there. that picture takes you to a thread on another forum where another guy used the 10k resistor and it worked for him also
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  #34  
Old 07-27-2016, 11:21 AM
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Quote:
Originally Posted by NISSANMASTER View Post

I hope this helps and I did photograph my adventure of fixing the tank with the 10k resistor.
Thanks for this, its a great contribution to this thread and im sure it will help someone when they need this fix.
You should do a DIY on this using the VW part, it would be the GoTo fix for this issue
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  #35  
Old 07-27-2016, 11:35 AM
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If my company decides to buy the VW insert, I will definitely photograph and post the whole procedure. in the meantime, for anyone wanting to use the VW part, the removal is simple. take the front half of the inner fender down that's held up with several 8mm screws and push clips. the tank is then visible and fully accessible. remove the tank by disconnecting all of the lines at the quick connects (4 lines) and unplug the bulk connectors on the side of the tank nearest the engine (4 plugs) The tank is then only held in by two 10mm bolts up top and two 13mm bolts on the side nearest the engine and one grommet fitting on the bottom. once the tank is out, take out the three 4mm allen head bolts on top of the tank that hold the pump down. the insert is held in by a plastic ring that simply twists off. now pry the insert out lightly with a flat blade screwdriver and lift it about 2-3 inches up as this is all you will be allowed due to the inside connections limiting the free play. IMPORTANT... do not pull on the inside "cup" you have to insert your hand into the tank and turn the inside cup about 1/8th of a turn counter clockwise to release the cup and then the whole insert comes out and is ready for replacement.
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  #36  
Old 07-27-2016, 11:53 AM
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Jesus, that is cheaper than sending to xemodex.



That would be an AWESOME find if this works.
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  #37  
Old 07-27-2016, 12:17 PM
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It will work. I took my insert out and apart and matched everything up. Same plugs and wire colors and connectors. My insert even had the same QR code picture on top and same yellow paint dot on top. Manufacturers part number matches as well.
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  #38  
Old 07-27-2016, 12:29 PM
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Now I am angry, why would BMW not offer this and instead make people pay for an entire tank when the part is available from the manufacturer?
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  #39  
Old 07-27-2016, 12:37 PM
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I wondered the same myself but from my experience with Nissan and Infiniti, some parts are available with Nissan that aren't available with Infiniti and are the exact same part. I believe the more expensive auto line uses tactics like these to maintain the "elite" status of their lineup so that not just anybody will be able to afford to own a BMW.
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  #40  
Old 07-27-2016, 01:00 PM
ard ard is offline
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Thanks for the contribution!


Quote:
Originally Posted by NISSANMASTER View Post
I wondered the same myself but from my experience with Nissan and Infiniti, some parts are available with Nissan that aren't available with Infiniti and are the exact same part. I believe the more expensive auto line uses tactics like these to maintain the "elite" status of their lineup so that not just anybody will be able to afford to own a BMW.
I had an infiniti Q45 for many years and found this commonly. It took quite a few years for the DIY community to crack the Infiniti nut, (figure out how parts interchanged, learn lessons from other Nissan parts, etc) as it was a new marque at that time....

BMW just doesnt care about parts costs after 50k
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