BMW X5 1999–2007 — technical service bulletin
Bulletin SIB-12-23-07 · NHTSA communication 10032813 · issued Nov 1, 2007
Technical service bulletin
communication type
Engine and Engine Cooling
component
1999–2007
model years
9
vehicle entries
Official summary
Bmw vehicle: fc 2ef4 characteristic map thermostat. Complaints that the service engine soon lamp is illuminated. Fault code 2ef4 characteristic map thermostat is stored in dme fault memory. Dme software calibration related to high heating requirements during subzero driving conditions. Reprogram vehicle with v27.1 (i level e070-07-09-520) or higher. *pe
Vehicles covered
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.