Has the Sonata X Engine Issue Been Resolved?
3 Answers
Sonata X engine issue has been resolved. Here is relevant information about Beijing Hyundai: Vehicle lineup: As of now, Beijing Hyundai possesses 14 main models including the All-New Tucson, 9th Generation Sonata, MISTRA Mingtu, Sonata Classic, All-New Santa Fe, ix35, ix25, Tucson, Langdong, VERNA Rena, Ruixi, ELANTRA Yuedong, Elantra, etc., covering multiple segments such as A0-class, A-class, B-class, and SUV markets. Profile: Beijing Hyundai Motor Co., Ltd. (BEIJING-HYUNDAI AUTO, referred to as "Beijing Hyundai"), is a Sino-foreign joint venture engaged in automobile production and sales, established on October 18, 2002, with its headquarters located in Beijing.
As someone who frequently tinkers with Hyundai vehicles, I've noticed that the early batch of Theta II engines in the Sonata 10 did have some issues, such as cold start noises or unstable power output. However, Hyundai issued a free software update recall around 2020. After the upgrade, the ECU tuning became more reasonable, effectively resolving common problems like misfires or check engine lights. From my experience, updated vehicles run much smoother, with noticeable improvements in noise control. But when buying a used car, it's essential to check the service records to ensure the update was performed. If minor issues persist, it's best to get a full diagnosis at an authorized dealership. Overall, the defects in these engines have been largely addressed, and newer models rarely encounter major problems.
I've been driving this Sonata 10 for over two years. Initially experienced engine vibrations, later learned it was caused by a software bug. Hyundai 4S proactively notified me for an upgrade - after completion, power delivery became smoother and no more warning lights appeared. Their recall campaign was extensive, resolving most misfire or idle instability issues. I find the current condition quite reliable, especially for daily commuting. However, older vehicles or modified ones might have residual problems, so checking upgrade history before purchase is advisable. Regular maintenance like timely oil changes and spark plug inspections can prevent recurrence. Overall, that incident has been properly resolved.
