Hyundai Sonata 2011 — technical service bulletin
Bulletin TSB-11-01-031 · NHTSA communication 10041947 · issued Sep 1, 2011
Technical service bulletin
communication type
Electrical System
component
2011
model years
1
vehicle entries
Official summary
Hyundai: see document search button for owner letter. Software update information relating to six controllers: ecm, tcm, hcu, mcu, bms and ldc is being provided. *pe updated 12/6/11. *pe
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.