The Hyundai G4GR is a 1,591 cc, inline‑four naturally aspirated petrol engine produced between 2010 and 2018. It features dual overhead camshafts (DOHC), 16 valves, and Hyundai’s Dual Continuously Variable Valve Timing (D‑CVVT) system. In standard form it delivered 97 kW (132 PS) at 6,300 rpm with 161 Nm of torque at 4,850 rpm, offering responsive urban performance and smooth highway cruising.
Fitted to models such as the i30 (GD), ix20, and Veloster, the G4GR was engineered for everyday drivability with an emphasis on fuel economy and low emissions. Emissions compliance was achieved through precise electronic throttle control, D‑CVVT, and a three‑way catalytic converter, allowing all variants to meet Euro 5 standards across European markets.
One documented concern is excessive oil consumption in early production units, highlighted in Hyundai Service Bulletin TSB‑ENG‑11‑003. This issue stems from piston ring land design tolerances that allow oil to bypass into the combustion chamber under high‑vacuum conditions. From mid‑2013, Hyundai implemented revised piston assemblies to mitigate this condition.
Hyundai
All production years 2010–2018 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/5679).
The Hyundai G4GR is a 1,591 cc inline‑four naturally aspirated petrol engine engineered for compact hatchbacks and MPVs (2010–2018). It combines DOHC architecture with Dual CVVT to deliver responsive low‑to‑mid range power and smooth idle quality. Designed to meet Euro 5 emissions standards, it balances urban agility with highway refinement and fuel efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,591 cc | |
| Fuel type | Petrol (Unleaded) | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 77.0 mm × 85.4 mm | |
| Power output | 97 kW (132 PS) @ 6,300 rpm | |
| Torque | 161 Nm @ 4,850 rpm | |
| Fuel system | Multi‑point fuel injection (MPFI) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain‑driven DOHC | |
| Oil type | Hyundai Genuine 5W‑30 (API SN/ILSAC GF‑5) | |
| Dry weight | 112 kg |
The Dual CVVT system enhances low-end responsiveness but requires clean oil flow to maintain phaser operation—extended oil intervals risk sludge buildup and cam timing faults. Hyundai Genuine 5W-30 oil is critical for piston ring sealing and chain longevity. Early engines (pre-06/2013) may exhibit oil consumption above 0.5 L/1,000 km due to piston ring design; revised pistons per TSB‑ENG‑11‑003 resolve this. The timing chain is designed for life but relies on consistent oil pressure—cold starts should be followed by gentle driving until oil temp stabilizes.
Oil Specs: Requires Hyundai Genuine 5W-30 meeting API SN/ILSAC GF-5 (Hyundai Owner’s Manual i30 GD).
Emissions: Euro 5 certification applies to all G4GR variants (2010–2018) (VCA Type Approval #VCA/EMS/5679).
Power Ratings: Measured under SAE J1349 standards. Output verified on EU-spec i30 1.6 GDi (Hyundai PT-2015).
Hyundai Technical Information System (TIS): Docs ENG-G4GR-01, ENG-G4GR-02, TSB-ENG-11-003
VCA Type Approval Database (VCA/EMS/5679)
SAE International: J1349 Engine Power Certification Standards
The Hyundai G4GR was used across Hyundai's GD and SR platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—reinforced mounts in the ix20 and revised intake manifolds in the Veloster—and from mid-2013 the piston ring update per TSB‑ENG‑11‑003, creating minor internal interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crankshaft pulley (Hyundai TIS ENG-G4GR-02). The 7th VIN digit is 'G' for G4GR-equipped vehicles. Early engines (pre-06/2013) use silver piston part number 22110-2GAA0; post-update units use black-coated pistons 22110-2GAB0. The G4GR is visually distinct from the Gamma G4FJ by its intake manifold routing and absence of direct injection components. Service parts for pistons and rings are production-date sensitive—verify build date before ordering.
The G4GR's primary reliability risk is elevated oil consumption in pre-2013 builds, with incidence linked to urban driving and extended oil intervals. Hyundai internal field data from 2012–2014 indicated a subset of early engines exceeding 0.5 L/1,000 km consumption, while UK DVSA MOT records show low mechanical failure rates overall. Cold-start idling and infrequent oil changes exacerbate ring coking, making adherence to service intervals critical.
Analysis derived from Hyundai technical bulletins (2011–2015) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HYUNDAI G4GR.
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