2020 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated June 2026
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2020 Hyundai Grandeur has 2 documented known issues. No issues are rated critical, indicating generally reliable ownership. Across all issues, repair costs range from $50 to $1,200. DIY maintenance guides at au7o.io.
On the 2017-2020 Hyundai Grandeur, a chronic problem (고질병) repeatedly cited in Korean owner communities for the Grandeur IG — and its Kia K7 sibling — is engine oil seepage from the front case (timing chain cover), typically appearing after roughly 50,000 km. The sealant between the front case and the block degrades, letting oil weep down the front of the engine; documented cases on the 3.0 V6 describe undercarriage panels soaked in oil, and the issue is also widely reported on 2.4 GDI cars. CV-joint (등속조인트) grease/oil leaks are mentioned alongside it as a related underbody finding during used-car inspections. Left alone, the leak worsens, can foul the drive belt area and triggers low-oil-level conditions.
Confirm the source with a degrease-and-recheck or UV dye test, since valve cover and CV-joint leaks look similar. The fix is to remove the front timing cover, clean both surfaces, and reseal with fresh liquid gasket — a labor-intensive job (roughly 300,000-700,000 KRW at Korean shops, a few hundred USD). Cars still inside the powertrain warranty have had it resealed free at Hyundai service centers; used-car performance-guarantee insurance has also covered it. Check the oil level regularly until repaired.
On the 2017-2022 Hyundai Grandeur, grandeur IG models (including the 2020+ facelift) with column-mounted electric power steering (C-MDPS) commonly develop a rattling, knocking or 'clunking' noise when the wheel is turned at a stop or at low speed. The noise comes from wear in the steering column's damping components — the flexible coupling and column bearing that prevent metal-to-metal contact. As the parts wear, owners also report increased steering play and a vague or notchy steering feel. The complaint is heavily documented across Korean owner communities (Bobaedream, Clien, AutoView boards) and on Namu Wiki's 6th-generation Grandeur page. Hyundai never declared it an official defect, but Blue Hands service centers perform goodwill free repairs — originally just the coupling/bearing, and more recently full MDPS assembly replacement when needed.
Take the car to a Hyundai Blue Hands or direct service center and reproduce the noise; Hyundai has been replacing the worn coupling/bearing — and in persistent cases the entire MDPS assembly — free of charge as a goodwill repair even out of warranty. If paying out of pocket at an independent shop, a coupling replacement is cheap, while a full column/MDPS unit replacement is a four-figure job in USD terms.
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According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2020-2020 Hyundai Grandeur has 2 documented issues. The most frequently reported are: Engine front case (timing cover) oil leak (Grandeur IG), C-MDPS steering column clunk and rattle (Grandeur IG). None are rated critical, but regular maintenance is recommended.
The 2020-2020 Hyundai Grandeur has 2 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. No issues are rated critical, suggesting generally good reliability. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known Hyundai Grandeur issues range from $50 to $1,200, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
A chronic problem (고질병) repeatedly cited in Korean owner communities for the Grandeur IG — and its Kia K7 sibling — is engine oil seepage from the front case (timing chain cover), typically appearing after roughly 50,000 km. The sealant between the front case and the block degrad… Repairs typically run $250-$700. Severity: medium.
Grandeur IG models (including the 2020+ facelift) with column-mounted electric power steering (C-MDPS) commonly develop a rattling, knocking or 'clunking' noise when the wheel is turned at a stop or at low speed. The noise comes from wear in the steering column's damping componen… Repairs typically run $50-$1,200. Severity: medium.
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.
