This exhaust fluid is refilled by your service center during regular maintenance. If you adhere to this maintenance schedule, it is usually not necessary to refill .
. X5 with BMW Advanced Diesel / Only refill the diesel exhaust fluid yourself in exceptional. Do not allow diesel exhaust fluid to come into contact with you.
DEF is not a fuel additive and never comes into contact with diesel. It is stored in a separate tank, typically with a blue filler cap.
Diesel Exhaust Fluid (DEF) X5 E70 (2007 – 2013). They determined that BMW issued an advisory that the fluid did not have to be changed, .