The 2.5-liter turbo engine Hyundai-Kia G4KS (Smartstream G2.5 T-GDi Hybrid) appeared in 2025 for the second-generation Hyundai Palisade and Kia Telluride. The engine itself produces 262 hp and 353 Nm, and together with the electric motor 334 hp and 460 Nm; it is intended to gradually replace the Lambda V6 engines.
Theta 2.5L family: G4KM, G4KN, G4KP, G4KR, G4KS.
Specifications
| Production years | since 2025 |
| Displacement, cc | 2497 |
| Fuel system | direct injection |
| Power output, hp | 262 |
| Torque output, Nm | 353 |
| Cylinder block | aluminum R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 88.5 |
| Piston stroke, mm | 101.5 |
| Compression ratio | 12.0 |
| Features | Hybrid |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | on both shafts |
| Turbocharging | yes |
| Recommended engine oil | 0W-30 |
| Engine oil capacity, liter | 5.8 |
| Fuel type | petrol |
| Euro standards | EURO 6e |
| Fuel consumption, L/100 km (for Hyundai Palisade 2025) — city — highway — combined |
7.8 6.5 6.9 |
| Engine lifespan, km | ~250 000 |
The engine was installed on:
- Hyundai Palisade 2 (LX3) since 2025;
- Kia Telluride 2 (LQ2) since 2026.
Disadvantages of the Hyundai-Kia G4KS engine
- The engine is new, so there is little failure statistics;
- There are a couple of complaints about sudden misfires with an engine error that disappears just as suddenly;
- Like all direct-injection engines, it suffers from carbon deposits on the intake valves;
- Outside its home markets, spare parts and used engines are hard to find.
Frequently asked questions about the Hyundai-Kia G4KS
How much power does the Hyundai-Kia G4KS make?
The Hyundai-Kia G4KS develops 262 hp and 353 Nm of torque.
How much oil does the Hyundai-Kia G4KS take and which one?
Engine oil capacity: 5.8 liters. Recommended oil: 0W-30.
Does the Hyundai-Kia G4KS have a timing belt or chain?
The Hyundai-Kia G4KS uses a timing chain.
Is the Hyundai-Kia G4KS turbocharged?
Yes, the Hyundai-Kia G4KS is turbocharged.
Does the Hyundai-Kia G4KS need valve clearance adjustment?
No, the Hyundai-Kia G4KS has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Hyundai-Kia G4KS last?
The typical lifespan of the Hyundai-Kia G4KS is ~250 000 km with proper maintenance.
What is the fuel consumption of the Hyundai-Kia G4KS?
Hyundai Palisade 2025: city 7.8, highway 6.5, combined 6.9 L/100 km.
What cars was the Hyundai-Kia G4KS installed on?
Hyundai Palisade 2 (LX3) since 2025; Kia Telluride 2 (LQ2) since 2026.
What are the common problems of the Hyundai-Kia G4KS?
The engine is new, so there is little failure statistics. There are a couple of complaints about sudden misfires with an engine error that disappears just as suddenly. All known problems.
