Hyundai Elantra 2011–2016 — technical service bulletin
Bulletin 21-EM-002H · NHTSA communication 10186830 · issued Jan 29, 2021
Technical service bulletin
communication type
Engine and Engine Cooling
component
2011–2016
model years
7
vehicle entries
Official summary
The Powertrain warranty coverage for the engine short block, consisting of the engine block, crankshaft, connecting rods and pistons, for damage related to a piston slap noise in the upper end of the engine as described in TSB # 21-EM-001H has been extended.
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.