Quote:
Originally Posted by darstar301
Does anybody have any wording from BMW ( website, manual ) that states flush and refill. When I picked up my X5, the dealer only refilled the amount that was used. They did not flush the old DEF fluid and stated that they only refill what is needed. Thanks
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bmw used to flush the system, not it is no longer required to flush it, just to top off. reference
SIB 16 01 09.
INFORMATION
Note: It is no longer necessary to drain the active and passive tanks during an oil service. Topping up of both tanks is now the approved method of refilling the system during a scheduled service even if the remaining DEF in the system is over twelve months old. The extraction tool should still be utilized when draining the SCR system during related repairs.