From 2004 to 2013, the company produced the 1.1-liter gasoline engine Hyundai G4HG, which was fitted to popular Korean models like the i10, Atos, Getz, and Kia Picanto. The iRDE 2 version of the engine for Euro 5 environmental standards took the place of the iRDE version for Euro 4 in 2010.

G3HA, G4HA, G4HC, G4HE, G4HD, and G4HG are members of the Epsilon family.
The engine was mounted on:
- Hyundai Atos 1 (MX) in 2004 – 2008;
- Hyundai Getz 1 (TB) in 2005 – 2009;
- Hyundai i10 1 (PA) in 2008 – 2013;
- Kia Picanto 1 (SA) in 2004 – 2011.
Specifications
| Production years | 2004-2013 |
| Displacement, cc | 1086 |
| Fuel system | distributed injection |
| Power output, hp | 63 – 67 (iRDE version) 69 (iRDE 2 version) |
| Torque output, Nm | 96 – 98 (iRDE version) 99 (iRDE 2 version) |
| Cylinder block | cast iron R4 |
| Block head | aluminum 12v |
| Cylinder bore, mm | 67 |
| Piston stroke, mm | 77 |
| Compression ratio | 10.1 |
| Features | SOHC |
| Hydraulic lifters | no |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 3.0 |
| Fuel type | petrol |
| Euro standards | EURO 4 (iRDE version) EURO 5 (iRDE 2 version) |
| Fuel consumption, L/100 km (for Hyundai i10 2009) — city — highway — combined |
6.1 4.4 5.0 |
| Engine lifespan, km | ~250 000 |
| Weight, kg | 84 |
Disadvantages of the Hyundai G4HG engine
The crankshaft, which was installed until 2009, is a known engine issue;
The timing phases stopped, the gear shifted, and the key was simply cut off;
The engine overheats rapidly and the cylinder head leads, so keep the radiators clean;
Because of throttle and idle speed controller contamination, the engine speed frequently floats at idle;
Unreliable wiring and a limited supply of candles are further drawbacks.
