Toyota Sienna Hybrid 2021–2024 — technical service bulletin
Bulletin T-SB-0048-24 · NHTSA communication 11005150 · issued May 15, 2024
Technical service bulletin
communication type
Electrical System
component
2021–2024
model years
4
vehicle entries
Official summary
Some 2021 – 2024 model year Sienna Hybrid vehicles equipped with a Blind Spot Monitor may exhibit a MIL ON condition with Diagnostic Trouble Code (DTC) C1AC200 (Rear Side Radar Sensor Beam Axis Misalignment) present and Blind Spot Monitor inoperative system warnings displayed.
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.