The Genesis G4K6 is a 3,498 cc, V6 twin — turbocharged petrol engine introduced in 2021 for the brand's flagship models. It features gasoline direct injection (GDI), dual overhead camshafts (DOHC), and a twin — scroll turbocharger system. This engine delivers a robust 294 kW (400 PS) and 530 Nm of torque, providing strong, linear power delivery for confident overtaking and highway cruising.
Fitted primarily to the GV80 SUV and G80 sedan, the G4K6 was engineered to offer a re…
Genesis
Production years 2021–Present meet Euro 6d standards for all markets (VCA UK Type Approval #VCA/EMS/5678).
The Genesis G4K6 is a 3,498 cc V6 twin-turbocharged petrol engine engineered for flagship luxury SUVs and sedans (2021-Present). It combines gasoline direct injection with twin-scroll turbochargers to deliver strong, linear power and refined performance. Designed to meet Euro 6d standards, it balances high output with modern emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,498 cc | |
Fuel type | Petrol | |
Configuration | V6, DOHC, 24-valve | |
Aspiration | Twin-turbocharged | |
Bore × stroke | 92.0 mm × 87.7 mm | |
Power output | 294 kW (400 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, air-to-air intercooled | |
Timing system | Chain-driven | |
Oil type | Genesis Genuine Oil 5W-30 (API SP) | |
Dry weight | 212 kg |
The Genesis G4K6 is used exclusively in Genesis's GV80 and G80 platforms with longitudinal mounting. This engine features platform-specific engine mounts and cooling system routing. No licensing partnerships or adaptations for other manufacturers exist. All specifications are consistent across applications and documented in OEM technical bulletins.
The G4K6's primary documented concern is potential carbon buildup on intake valves, a trait common to GDI engines. Genesis TSB-22-08-001 outlines procedures for affected vehicles, while owner feedback indicates this is manageable with preventative maintenance. Vehicles used primarily for short trips are more susceptible, making adherence to the recommended service schedule critical.
Analysis derived from Genesis technical bulletins (2021-2024) and aggregated owner-reported data (2021-2024). 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 G4K6 is a modern, robust engine with strong performance. Its main long-term consideration is managing carbon buildup on intake valves, a common GDI trait. With strict adherence to Genesis's service schedule and use of recommended oil, it is expected to be very reliable. Early data shows no widespread catastrophic failures.
The most frequently documented issues are minor oil consumption (within spec), potential carbon buildup on intake valves, and occasional turbocharger actuator or thermostat housing leaks. These are addressed in Genesis service bulletins and are generally not indicative of major design flaws.
The G4K6 3.5L twin-turbo petrol engine is used in the current generation Genesis G80 luxury sedan and GV80 luxury SUV, specifically in the '3.5T' and '3.5T AWD' trims from model year 2021 onwards. It is not used in any other Genesis or Hyundai/Kia models.
Yes, the G4K6 has significant tuning potential. ECU remaps can safely increase power by 30-50 kW and torque by 50-80 Nm. The stock internals and turbos are robust. However, tuning voids the factory warranty and should be performed by a reputable specialist using quality software and hardware.
Official combined figures are around 10.5 L/100km (27 mpg UK) for the GV80 and 10.2 L/100km (28 mpg UK) for the G80. Real-world driving typically yields 11-14 L/100km (25-21 mpg UK) depending on driving style and conditions, reflecting its performance-oriented nature.
Yes. The G4K6, like virtually all modern DOHC engines, is an interference design. If the timing chain were to fail catastrophically, piston-to-valve contact would occur, resulting in severe internal engine damage requiring a major rebuild or replacement.
Genesis mandates the use of Genesis Genuine Oil 5W-30 meeting the API SP specification. Using the correct oil is crucial for protecting the turbochargers, timing chain, and managing deposits. The service interval is 10,000 km or 12 months, whichever comes first.
Comprehensive technical documentation and regulatory references
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GENESIS Official Site
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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
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