According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2019 Hyundai Grandeur has 1 documented known issues, with 1 rated critical. The most serious is Theta II 2.4 GDI connecting-rod bearing wear and engine seizure (Grandeur IG 2.4) ($0-$6,500 repair). Across all issues, repair costs range from $ to $6,500. DIY maintenance guides at au7o.io.
On the 2017-2019 Hyundai Grandeur, the 2.4L Theta II GDI engine offered in the pre-facelift Grandeur IG (2017-2019, before the 2.5 Smartstream replaced it) is part of the Theta II family covered by Hyundai's Korea-market recall and lifetime engine warranty. Machining debris and oil-supply problems cause connecting-rod bearing wear that progresses to rod knock, cylinder-wall scuffing, heavy oil consumption and, in the worst cases, sudden engine seizure while driving. MOLIT-supervised recalls installed the KSDS knock-sensor detection software, which puts the car in reduced-power limp mode (often with code P1326) when bearing noise is detected, and Hyundai extended a lifetime warranty on the engine for Grandeur HG/IG among roughly 520,000 Korean vehicles (4.69 million worldwide). Korean owner communities (Bobaedream, Clien) consistently report oil-consumption and knock cases on IG 2.4 cars.
Metallic knocking or rod-knock noise from the engine, especially at cold start
Engine oil level drops noticeably between oil changes
Check-engine light with P1326 and reduced-power limp mode
Loss of power or hesitation under acceleration
Sudden engine stall or seizure while driving in severe cases
How to Fix
Have the KSDS software recall performed and, at any sign of knock, oil consumption or a P1326 code, present the car to a Hyundai service center for the Theta II bearing inspection. Engines that fail inspection are replaced with a new short/long block free of charge under the lifetime Theta II warranty (Korea and US); Hyundai also reimburses prior out-of-pocket repairs and towing. Outside warranty coverage, a replacement engine runs several thousand dollars. Use the correct oil and check the level frequently between services.
What are the most common Hyundai Grandeur problems?
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2019-2019 Hyundai Grandeur has 1 documented issues. The most frequently reported are: Theta II 2.4 GDI connecting-rod bearing wear and engine seizure (Grandeur IG 2.4). Of these, 1 is rated critical and should be addressed promptly.
Is the Hyundai Grandeur reliable?
The 2019-2019 Hyundai Grandeur has 1 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 1 issue is rated critical: Theta II 2.4 GDI connecting-rod bearing wear and engine seizure (Grandeur IG 2.4). Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Hyundai Grandeur problems?
Repair costs for known Hyundai Grandeur issues range from $0 to $6,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Theta II 2.4 GDI connecting-rod bearing wear and engine seizure (Grandeur IG 2.4), typically costs $0-$6,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2017-2019 Hyundai Grandeur Theta II 2.4 GDI connecting-rod bearing wear and engine seizure (Grandeur IG 2.4)?
The 2.4L Theta II GDI engine offered in the pre-facelift Grandeur IG (2017-2019, before the 2.5 Smartstream replaced it) is part of the Theta II family covered by Hyundai's Korea-market recall and lifetime engine warranty. Machining debris and oil-supply problems cause connecting… Repairs typically run $0-$6,500. Severity: high.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
