Subaru B9 Tribeca 2011–2012 — technical service bulletin
Bulletin 11-111-12R · NHTSA communication 10093953 · issued Dec 6, 2012
Technical service bulletin
communication type
Engine and Engine Cooling
component
2011–2012
model years
6
vehicle entries
Official summary
P0128 coolant thermostat (engine coolant temperature below thermostat regulating temperature)
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.