Acura TLX 2021–2025 — technical service bulletin
Bulletin B25-048 · NHTSA communication 11023273 · issued Sep 17, 2025
Technical service bulletin
communication type
Engine
component
2021–2025
model years
5
vehicle entries
Official summary
Service Bulletin - Oil leak at the cam chain tensioner inspection cover due to and insufficient sealant adhesion on the inspection cover.
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.