Service bulletins for the 2021 Hyundai Elantra
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
96 on file from NHTSA, as of 2026-10-19.
About P2181 on the 2021 Hyundai Elantra: what the code means, and the bulletins and recalls about the same components.
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Only bulletins with trouble code: P2181 are shown. Show all
| 25-EM-007H TSB | 2026-01-06. Service bulletin. ENGINE. Some Elantra (CN7, CN7A), Kona (OS, SX2), and Sonata Hybrid (DN8 HEV) vehicles equipped with 2.0L engines may illuminate a warning lamp for DTC P218100 (Cooling System Performance) related to the Integrated Thermal-Management Module (ITM). Follow the service procedure in this bulletin to install a spring onto the thermostat within the ITM, in order to prevent premature opening, and perform an ECU software update on affected vehicles. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.