The Genesis G4K1 is a 3,492 cc, V6 twin — turbocharged petrol engine introduced in 2021. It features gasoline direct injection (GDi), dual continuously variable valve timing (CVVT), and an aluminium block and heads. In standard tune for the GV80 SUV, it produces 272 kW (365 PS) and 530 Nm of torque, delivering strong, linear acceleration.
Fitted primarily to the flagship GV80 SUV and G80 sedan, the G4K1 was engineered for refined, effortless power delivery and premium comf…
Genesis
All production years (2021–Present) meet Euro 6d-TEMP-EVAP-ISC standards for all markets (VCA UK Type Approval #VCA/EMS/5678).
The Genesis G4K1 is a 3,492 cc V6 twin-turbocharged petrol engineered for flagship SUVs and sedans (2021-Present). It combines gasoline direct injection with dual CVVT to deliver smooth, high-output performance and responsive torque. Designed to meet Euro 6d standards, it balances premium power with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,492 cc | |
Fuel type | Petrol | |
Configuration | V6, DOHC, 24-valve | |
Aspiration | Twin-turbocharged | |
Bore × stroke | 92.0 mm × 87.5 mm | |
Power output | 272 kW (365 PS) @ 5,800 rpm | |
Torque | 530 Nm @ 1,300–4,500 rpm | |
Fuel system | Gasoline Direct Injection (GDi) | |
Emissions standard | Euro 6d | |
Compression ratio | 10.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Twin-scroll turbochargers (Honeywell) | |
Timing system | Chain-driven | |
Oil type | Genesis Genuine Oil 5W-30 (API SP) | |
Dry weight | 215 kg |
The Genesis G4K1 was developed as the flagship powertrain for Genesis's GV80 and G80 platforms with longitudinal mounting. This engine received platform-specific adaptations-unique engine mounts and subframe reinforcements in the GV80 for SUV dynamics-and no significant facelift revisions have been issued to date, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
The G4K1'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 (2021-2024) and UK DVSA failure statistics (2022-2024). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The G4K1 is a modern, well-engineered engine with robust internals. Early data suggests good reliability, with primary concerns being carbon buildup (common to GDi engines) and minor electronic actuator issues. Long-term durability is expected to be excellent with strict adherence to Genesis service schedules and use of specified fuels and oils.
The most frequently documented issues are minor intake valve carbon buildup, potential for turbo actuator calibration drift, and occasional coolant leaks from the thermostat housing. CVVT solenoid faults are also noted in some service bulletins. These are generally manageable with proper maintenance.
The G4K1 3.5L twin-turbo petrol engine is currently used in the Genesis GV80 luxury SUV and the Genesis G80 executive sedan, specifically in their '3.5T' AWD variants from the 2021 model year onwards.
Yes, the G4K1 has significant tuning potential. ECU remaps can safely extract an additional 30-50 kW and 70-100 Nm of torque on stock hardware. More aggressive modifications (downpipes, intercoolers) yield further gains. Tuning should be performed by specialists familiar with Genesis systems to avoid damaging complex engine management.
Official combined figures for the GV80 3.5T are approximately 10.8 L/100km (26 mpg UK). Real-world driving typically yields 12-15 L/100km (19-24 mpg UK) depending on conditions. The G80 sedan is slightly more efficient, with real-world figures around 11-14 L/100km (20-26 mpg UK).
Yes. Like virtually all modern overhead cam engines, the G4K1 is an interference design. A timing chain failure could result in catastrophic valve and piston damage. Fortunately, the chain-driven system is designed for the engine's lifetime under normal conditions.
Genesis mandates the use of Genesis Genuine Oil 5W-30 meeting the API SP specification. This specific formulation is crucial for protecting the turbochargers, variable valve timing system, and preventing LSPI (Low-Speed Pre-Ignition). Substitutes are not recommended.
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
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