This should give them enough to go on...
Quote:
SUBJECT
Engine Idle Speed Dips Too Low While Braking at Lower Vehicle Speeds
MODEL
E89 with the N52K engine with automatic transmission, produced up to March 2010
SITUATION
The engine speed may drop too low when slowing to a stop or braking at low road speeds.
This occurs intermittently, but can be more apparent when the automatic transmission selector lever is in the "Sport mode" position.
CAUSE
Unfavorable DME software application
CORRECTION
Program the vehicle using ISTA/P 2.37.0 or later.
Vehicle integration (new): E89X-10-03-501 or later.
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