The 2021 Hyundai Elantra's reliability story is decidedly mixed, with owners reporting both trouble-free experiences and significant mechanical failures within the first few years of ownership. While some owners like T. Bischoff praise their SEL model's smooth operation after 17,000 miles, others have encountered serious issues that raise questions about long-term dependability.
Early mechanical failures appear to be a notable concern among 2021 Elantra owners. One particularly alarming case involved a transmission failure at just 7,000 miles, requiring a complete replacement covered under warranty. The owner noted that another 2021 Elantra at the same dealership experienced the same transmission issue, suggesting this may not be an isolated incident. Engine problems have also surfaced, with one owner discovering significant engine sludge at 24,500 kilometers despite following regular maintenance intervals.
Electronic systems present another reliability challenge for the 2021 Elantra. Multiple owners report issues with forward collision sensors malfunctioning, infotainment screens randomly going black, and widespread electronic failures where multiple warning lights activate simultaneously. One owner experienced a complete electronic system failure that affected power steering, sensor functions, and even the outside temperature display. A Hyundai representative acknowledged that COVID-related quality control issues may have contributed to these problems.
Dealer service experiences vary significantly, with some regions reporting extended wait times of six months or more for diagnostic work. However, Hyundai's warranty coverage generally addresses major mechanical failures, though the inconvenience and potential safety concerns remain significant factors for prospective buyers to consider.
Key Takeaways
- Transmission failures reported at 7,000 miles requiring complete replacement under warranty
- Engine sludge problems occurring despite regular maintenance, with dealer claims it's 'normal' for winter driving
- Widespread electronic system failures affecting collision sensors, infotainment, and power steering
- Mixed dealer service experiences with some regions reporting 6+ month wait times for diagnostics
