Acura MDX 2009–2014 — technical service bulletin
Bulletin ONL6C502142019 · NHTSA communication 10153515 · issued Feb 14, 2019
Technical service bulletin
communication type
Engine and Engine Cooling
component
2009–2014
model years
16
vehicle entries
Official summary
Owner Notification Letter - On certain 2009-14 Acura vehicles equipped with the 3.7L V6 engine, the oil control rings may become clogged with carbon deposits during normal engine operation. These deposits restrict the control ring's ability to return oil from the cylinder walls to the crankcase, resulting in excessive engine oil consumption.
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.