Acura Adx 2023–2026 — technical service bulletin
Bulletin BBJA31120 · NHTSA communication 11037431 · issued Sep 14, 2026
Technical service bulletin
communication type
Engine
component
2023–2026
model years
6
vehicle entries
Official summary
Job Aid - This job aid only applies to vehicles involved in the cylinder head gasket warranty extension. While replacing the cylinder head gasket, a flatness check of the mating surfaces of both the cylinder head and engine block must be done. If the mating surface warpage is found to be outside of service manual specifications, replacement of the component is required.
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.