The 2.0-liter Hyundai-Kia G4NS (Smartstream G2.0 MPi) has been produced since 2020 for the seventh-generation Elantra, the Kona and the Kia K4. It is an Atkinson-cycle engine with port injection and 149 hp that replaced the G4NH, which had become the subject of recalls.
Nu family: G4NB, G4NA, G4NC, G4ND, G4NE, G4NH, G4NG, G4NL, G4NN, G4NJ, G4NM, G4NS, G4NR.
Specifications
| Production years | since 2020 |
| Displacement, cc | 1999 |
| Fuel system | distributed injection |
| Power output, hp | 149 |
| Torque output, Nm | 179 |
| Cylinder block | aluminum R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 81 |
| Piston stroke, mm | 97 |
| Compression ratio | 12.5 |
| Features | Atkinson cycle |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | Dual E-CVVT |
| Turbocharging | no |
| Recommended engine oil | 0W-20 |
| Engine oil capacity, liter | 4.3 |
| Fuel type | petrol |
| Fuel consumption, L/100 km (for Hyundai Kona 2024) — city — highway — combined |
7.9 6.6 7.3 |
| Engine lifespan, km | ~250 000 |
| Weight, kg | 119 |
The engine was installed on:
- Hyundai Elantra 7 (CN7) since 2020;
- Hyundai Kona 1 (OS) in 2020 – 2023, Kona 2 (SX2) since 2023;
- Kia K4 2 (CL4) since 2024.
Disadvantages of the Hyundai-Kia G4NS engine
- A simple naturally aspirated engine with port injection;
- Unlike its problematic predecessor, it has not been subject to recalls so far, and owners have not found clear weak points;
- Engines of this series are known for a short-lived timing chain; it remains to be seen how it performs here;
- Outside its home markets, spare parts and used engines are hard to find.
Frequently asked questions about the Hyundai-Kia G4NS
How much power does the Hyundai-Kia G4NS make?
The Hyundai-Kia G4NS develops 149 hp and 179 Nm of torque.
How much oil does the Hyundai-Kia G4NS take and which one?
Engine oil capacity: 4.3 liters. Recommended oil: 0W-20.
Does the Hyundai-Kia G4NS have a timing belt or chain?
The Hyundai-Kia G4NS uses a timing chain.
Is the Hyundai-Kia G4NS turbocharged?
No, the Hyundai-Kia G4NS is naturally aspirated.
Does the Hyundai-Kia G4NS need valve clearance adjustment?
No, the Hyundai-Kia G4NS has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Hyundai-Kia G4NS last?
The typical lifespan of the Hyundai-Kia G4NS is ~250 000 km with proper maintenance.
What is the fuel consumption of the Hyundai-Kia G4NS?
Hyundai Kona 2024: city 7.9, highway 6.6, combined 7.3 L/100 km.
What cars was the Hyundai-Kia G4NS installed on?
Hyundai Elantra 7 (CN7) since 2020; Hyundai Kona 1 (OS) in 2020 - 2023, Kona 2 (SX2) since 2023; Kia K4 2 (CL4) since 2024.
What are the common problems of the Hyundai-Kia G4NS?
A simple naturally aspirated engine with port injection. Unlike its problematic predecessor, it has not been subject to recalls so far, and owners have not found clear weak points. All known problems.
