BMW 530I 2024–2026 — technical service bulletin
Bulletin B066-25 · NHTSA communication 11025855 · issued Nov 20, 2025
Technical service bulletin
communication type
Engine
component
2024–2026
model years
9
vehicle entries
Official summary
Expansion Tank Return
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.