Great thread folks.My 2011 X5d went 10244 miles before first service and required no DEF
My driving habits have not changed.
At ~17K, my low DEF light went on. My service advisor said to add a small bottle (1/2gal) and that should carry me over till service. I was skeptical but said OK and it was pretty cheap. Now at 18100, my light goes back on???
1. Was I underfilled? Service report at 10244 says I took 1 unit.
2. Transfer pump issue? I suspect #1 is real issue
2. Please explain active v. passive tanks. I see the filler in my X5d on right side and have added fluid there. Where is other filler port?
2016 Range Rover Sport HSE Montalcino Red, Ivory (wifes)
2011 BMW X35d Vermillion Red, Cinnamon Brown leather (good riddance)
2012 Mazda MX5 GTPRHT True Red
2011 Lotus Evora S Persian Blue
2008 Isuzu Ascender Lux the worker