BMW X5 2019–2020 — technical service bulletin
Bulletin B170220 · NHTSA communication 10174006 · issued Apr 1, 2020
Technical service bulletin
communication type
Engine and Engine Cooling
component
2019–2020
model years
5
vehicle entries
Official summary
COOLANT LEAKING FROM THE LOW TEMPERATURE COOLING SYSTEM (B58C ENGINE): This Service Information Bulletin (Revision 1) replaces SI B17 02 20 dated March 2020. Premature breakdown of the coolant with gassing in the low temperature cooling system.
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.