BMW X5 2008–2013 — technical service bulletin
Bulletin B123215 · NHTSA communication 10147862 · issued Dec 1, 2015
Technical service bulletin
communication type
Engine
component
2008–2013
model years
6
vehicle entries
Official summary
"Engine Idle Speed Fluctuates Intermittently, when Shifting into Gear. While stationary, the engine idle speed could fluctuate (once or a few times) after engaging either ""Drive"" or ""Reverse gear. It is possible that the engine could also stall. This situation is intermittent, difficult to reproduce, and would not cause a fault to be stored. However, it is more likely to occur right after restarting a hot engine, A/C on, steering turned, and at ambient temperatures above 70° F. CAUSE DME software error (idle speed controller set point)."
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.