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?
2011 X35d Vermillion Red, Cinnamon Brown leather, loaded
2010 Lotus Evora LE Package
2008 Isuzu Ascender Lux the worker
2005 Lotus Elise LRG, Red leather
2004 Jaguar XJ Vandan Plas Radiance Red, Ivory leather Gorgeous