What are the most common Hyundai Grandeur problems?
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2018 Hyundai Grandeur has 3 documented issues. The most frequently reported are: Theta II 2.4 GDI connecting-rod bearing wear and engine seizure (Grandeur IG 2.4), Engine front case (timing cover) oil leak (Grandeur IG), C-MDPS steering column clunk and rattle (Grandeur IG). Of these, 1 is rated critical and should be addressed promptly.
Is the Hyundai Grandeur reliable?
The 2018 Hyundai Grandeur has 3 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 $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.
What is the 2017-2019 Hyundai Grandeur Theta II 2.4 GDI connecting-rod bearing wear and engine seizure (Grandeur IG 2.4)?
Hyundai identifies the Grandeur among Korea-market Theta II GDI vehicles receiving expanded Knock Sensor Detection System (KSDS) coverage and a lifetime engine warranty limited to connecting-rod-bearing seizure. Hyundai's official 2019 Grandeur specification identifies its engine… Severity: high.
What is the 2017-2020 Hyundai Grandeur Engine front case (timing cover) oil leak (Grandeur IG)?
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.
What is the 2017-2022 Hyundai Grandeur C-MDPS steering column clunk and rattle (Grandeur IG)?
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.
