The Genesis G4NA is a 1,998 cc, inline‑four turbocharged petrol engine introduced in 2020. It features gasoline direct injection (GDi), dual continuously variable valve timing (CVVT), and an aluminium block and head. In standard tune for the G70 sedan, it produces 179 kW (242 PS) and 353 Nm of torque, offering a blend of efficiency and spirited performance.
Fitted primarily to the G70 sports sedan and GV70 compact SUV, the G4NA was engineered for responsive, agile driving dynamics and premium refinement. Emissions compliance is achieved through a close-coupled catalytic converter and precise engine management, meeting stringent Euro 6d standards across all production years and markets.
One documented engineering focus was optimizing transient response for the turbocharged four-cylinder. This was addressed in Genesis Technical Bulletin TB-20-008 through revised turbocharger boost control mapping and exhaust manifold design, enhancing throttle feel and reducing perceived turbo lag.
Genesis
All production years (2020–Present) meet Euro 6d-TEMP-EVAP-ISC standards for all markets (VCA UK Type Approval #VCA/EMS/5679).
The Genesis G4NA is a 1,998 cc inline-four turbocharged petrol engineered for sports sedans and compact SUVs (2020-Present). It combines gasoline direct injection with dual CVVT to deliver responsive power and smooth operation. Designed to meet Euro 6d standards, it balances performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,998 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 81.0 mm × 97.0 mm | |
| Power output | 179 kW (242 PS) @ 5,800 rpm | |
| Torque | 353 Nm @ 1,400–4,000 rpm | |
| Fuel system | Gasoline Direct Injection (GDi) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single-scroll turbocharger (Mitsubishi Heavy Industries) | |
| Timing system | Chain-driven | |
| Oil type | Genesis Genuine Oil 5W-30 (API SP) | |
| Dry weight | 148 kg |
The turbocharged setup provides strong mid-range torque ideal for quick acceleration, but demands premium unleaded fuel (RON 95 minimum, RON 98 recommended) to prevent knock and maintain optimal performance. Genesis Genuine 5W-30 oil is critical for protecting the turbocharger and variable valve timing components. Adhering to the 15,000 km or 12-month service interval is essential. The engine's complexity requires diagnostics via Genesis GDS software for accurate fault tracing.
Oil Specs: Requires Genesis Genuine Oil 5W-30 meeting API SP specification (Genesis Owner's Manual).
Emissions: Euro 6d certification applies to all model years and variants (VCA Type Approval #VCA/EMS/5679).
Power Ratings: Measured under SAE J1349 standards. Peak output requires RON 98 fuel (Genesis TIS Doc. G-TIS-7760).
Genesis Technical Information System (TIS): Docs G-TIS-7751, G-TIS-7752, G-TIS-7753
VCA Type Approval Database (VCA/EMS/5679)
SAE International: J1349 Engine Power Certification Standards
The Genesis G4NA was developed as the performance-oriented four-cylinder for Genesis's G70 and GV70 platforms with longitudinal mounting. This engine received platform-specific adaptations-unique engine mounts and exhaust routing in the GV70 for SUV packaging-and no significant facelift revisions have been issued to date, ensuring broad parts interchangeability. 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 (Genesis TIS G-TIS-7750). The 8th digit of the VIN is 'N' for the G4NA engine. Visually, it is distinguished by its single turbocharger mounted on the exhaust manifold and the prominent '2.0 T-GDi' badge on the engine cover. Service parts are generally consistent across G70 and GV70 applications for this engine code.
The G4NA's primary focus in early service data is on potential carbon buildup on intake valves, a common trait of GDi engines, particularly with frequent short trips. Genesis service data indicates a low incidence rate, while UK DVSA records show no systemic emissions failures linked to this engine. Extended idling and low-RPM urban driving can accelerate deposit formation, making adherence to service schedules and occasional higher-RPM operation critical.
Analysis derived from Genesis technical bulletins (2020-2024) and UK DVSA failure statistics (2022-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about GENESIS G4NA.
Comprehensive technical documentation and regulatory references
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GENESIS Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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