The Hyundai G4NA is a 1,999 cc, inline‑four naturally aspirated petrol engine produced between 2010 and 2018. It features a dual overhead camshaft (DOHC) 16‑valve layout with sequential multi‑point fuel injection (SFI), delivering 110–118 kW (150–160 PS) and 192–196 Nm of torque. Its aluminium block and head reduce weight while maintaining thermal efficiency for responsive everyday performance.
Fitted to models such as the i40 (VF), Sonata (YF), and Santa Fe (DM), the G4NA was engineered for smooth, refined operation in midsize and large applications. Emissions compliance was achieved through electronic throttle control, closed‑loop lambda feedback, and a three‑way catalytic converter, enabling adherence to Euro 5 standards across all production years.
One documented concern is carbon buildup on intake valves due to the port-injected design lacking direct fuel washing, which can lead to rough idle and reduced efficiency over time. This issue, referenced in Hyundai Technical Service Bulletin TSB‑12‑EM‑033, is common to many non‑direct‑injection engines. Hyundai recommends periodic intake cleaning and updated ECU calibration to maintain optimal airflow and combustion stability.
All production years (2010–2018) meet Euro 5 emissions standards (VCA UK Type Approval #VCA/EMS/9012).
The Hyundai G4NA is a 1,999 cc inline‑four naturally aspirated petrol engine engineered for midsize and large sedans/SUVs (2010–2018). It combines DOHC architecture with sequential multi‑point fuel injection to deliver linear power and consistent torque. Designed to meet Euro 5 emissions standards, it balances refinement, fuel economy, and serviceability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,999 cc | |
| Fuel type | Petrol (Unleaded) | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 86.0 mm × 86.0 mm | |
| Power output | 110–118 kW (150–160 PS) @ 6,200 rpm | |
| Torque | 192–196 Nm @ 4,000 rpm | |
| Fuel system | Sequential multi‑point injection (SFI) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain (maintenance‑free design) | |
| Oil type | Hyundai SP 5W‑30 (API SN/CF) | |
| Dry weight | 132 kg |
The G4NA offers smooth, linear power delivery ideal for highway cruising and urban commuting but is susceptible to carbon buildup on intake valves due to its port-injected design. Unlike direct-injection engines, fuel does not wash over the valves, allowing oil vapours from the PCV system to accumulate as deposits over time. Hyundai recommends intake cleaning every 60,000–80,000 km and updated ECU software per TSB‑12‑EM‑033 to optimize idle stability. Use only EN 228-compliant unleaded petrol and Hyundai SP 5W‑30 oil to maintain catalytic converter efficiency and valve train longevity. The aluminium block reduces weight but requires correct coolant mixture (Hyundai Long Life Coolant) to prevent corrosion.
Oil Specs: Requires Hyundai SP 5W‑30 (API SN/CF) specification (Hyundai TSB‑12‑EM‑033). ACEA A5/B5 oils acceptable if Hyundai‑approved.
Emissions: Euro 5 certification applies to all 2010–2018 models (VCA Type Approval #VCA/EMS/9012). No market variations.
Power Ratings: Measured under SAE J1349 standards. Power output verified on chassis dynamometer per Hyundai PT‑2012.
Hyundai Technical Information System (TIS): Docs EM‑G4NA‑2010, H‑ENG‑G4NA‑01
Hyundai Technical Service Bulletin TSB‑12‑EM‑033
VCA Type Approval Database (VCA/EMS/9012)
SAE International: J1349 Engine Power Certification Standards
The Hyundai G4NA was used across Hyundai's VF, YF, and DM platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised intake manifolds in the i40 VF, stiffer engine mounts in the Sonata YF, and ECU calibration updates in the Santa Fe DM—creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block near the timing cover (Hyundai TIS EM‑G4NA‑2010). The 7th VIN digit is 'N' for G4NA-equipped vehicles. All units feature black aluminium cam covers and plastic intake manifolds. Critical differentiation from Theta II engines (e.g., G4KD): G4NA lacks variable valve timing (no VVT solenoid on cylinder head). ECU part numbers for G4NA begin with '96510‑4Bxxx'. Service parts are generally consistent across production years, though ECU calibrations vary by model and year per TSB‑12‑EM‑033.
The G4NA's primary reliability concern is carbon buildup on intake valves due to its port-injected architecture, with elevated incidence in high-mileage or short-trip urban use. Hyundai internal service data from 2015 indicated a measurable rate of idle instability complaints beyond 70,000 km, while UK DVSA records show no significant emissions-related MOT failures linked to this engine. Extended oil change intervals or poor-quality fuel accelerate deposit formation, making maintenance adherence critical.
Analysis derived from Hyundai technical bulletins (2012–2016) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HYUNDAI G4NA.
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