Acura RDX 2019–2021 — technical service bulletin
Bulletin B21-027 · NHTSA communication 10200853 · issued Aug 31, 2021
Technical service bulletin
communication type
Forward Collision Avoidance
component
2019–2021
model years
3
vehicle entries
Official summary
Service Bulletin - The ACC system error message comes on while driving when outside temperatures are low/near freezing.
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.