BMW 525D Xdrive 2014–2015 — technical service bulletin
Bulletin 111314 · NHTSA communication 10148216 · issued Aug 1, 2014
Technical service bulletin
communication type
Engine and Engine Cooling
component
2014–2015
model years
5
vehicle entries
Official summary
N57T Diesel with Fault Code 29EB00: EGR Cooling Plausibility. The Service Engine Soon lamp is on (MIL) with the following fault stored in the DDE: 29EB00 - EGR cooling, plausibility: Exhaust-gas recirculation cooler bypass flap faulty or cooler efficiency too low CAUSE Unfavorable DDE software.
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.