Volkswagen Jetta 2009 — technical service bulletin
Bulletin V011334 2018902 · NHTSA communication 10155928 · issued Oct 24, 2013
Technical service bulletin
communication type
Equipment
component
2009
model years
3
vehicle entries
Official summary
Technical Bulletin (AC Cooling Efficiency issues): The A/C compressor will shut off too early under very light acceleration. This condition may lead to insufficient cooling efficiency in hot weather climates. The production solution to this issue was Software updated as of VIN: 1K_9M048612 for Jetta vehicles, Concern identified after end of production for Rabbit vehicles.
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.