2016 Hyundai Sonata HEV

The 2016 Hyundai Sonata HEV's federal record reveals a clear front-loaded defect arc: the 2020 reporting period shows the highest activity with 16 complaints, 1 recall, and 1 investigation alongside 58 technical service bulletins, after which both complaints and TSBs steadily decline to 9 complaints and 17 TSBs by 2024, with no further recalls or investigations. This trajectory suggests the most serious safety issues were identified and addressed early in the vehicle's lifecycle, and the diminishing complaint volume in later years indicates that owners who held onto these vehicles into 2023–2024 experienced fewer unresolved problems. However, the target year's complaint profile is dominated overwhelmingly by engine issues at 313 complaints — far exceeding all other categories combined — accompanied by 28 fire complaints and 19 crash complaints, which signals a serious powertrain concern even if the data does not specify a root cause. The decline in TSBs from 58 to 17 over the observed period implies that dealers and technicians progressively developed and disseminated repair strategies, meaning a well-maintained example that has already had recall and TSB work performed could be reasonably reliable. **Takeaway:** This is a buy-with-caution year — insist on documentation that all recall and TSB engine-related repairs have been completed, and given the fire complaint volume, have a pre-purchase inspection specifically assess the engine and electrical systems before committing.