The Genesis G4K3 is a 3,498 cc, V6 twin — turbocharged petrol engine introduced in 2021. It features gasoline direct injection (GDi), dual overhead camshafts (DOHC), and a twin — scroll turbocharger system. This powertrain delivers strong, linear power for a refined driving experience, producing 294 kW (400 PS) and 530 Nm of torque.
Fitted primarily to the GV80 SUV and G80 sedan, the G4K3 was engineered for drivers seeking a blend of luxury, effortless performance, and qui…
Genesis
All production years (2021–Present) meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/5678).
The Genesis G4K3 is a 3,498 cc V6 twin-turbocharged petrol engine engineered for luxury SUVs and sedans (2021–Present). It combines gasoline direct injection with twin-scroll turbochargers to deliver smooth, high-torque performance and responsive power. Designed to meet Euro 6d standards, it balances exhilarating performance with regulatory 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) | |
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, water-cooled (Honeywell) | |
Timing system | Chain-driven | |
Oil type | Genesis Genuine Oil 5W-30 (API SP) | |
Dry weight | 218 kg |
The Genesis G4K3 was developed for Genesis's flagship G80 and GV80 platforms with longitudinal mounting. This engine features platform-specific tuning for the GV80's SUV weight and the G80's sedan dynamics. All adaptations are documented in OEM technical bulletins.
The G4K3's primary documented concern is potential carbon buildup on intake valves, a trait common to direct-injection engines. Genesis TSB-21-08-001 outlines a preventative maintenance procedure for high-mileage vehicles, while owner feedback suggests spark plug longevity can vary under aggressive driving. Regular adherence to the specified 5W-30 oil and proactive cleaning can mitigate these concerns.
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 G4K3 is a modern, well-engineered engine with strong initial reliability. Its main long-term consideration is managing carbon buildup via periodic cleaning (per TSB-21-08-001). With strict adherence to service schedules and using the correct 5W-30 oil, it is expected to be very durable.
The most frequently documented issues are intake valve carbon buildup (addressed by a service bulletin), accelerated spark plug wear under hard use, and occasional turbo actuator calibration needs. Minor oil consumption within Genesis's published limits is also noted.
The G4K3 3.5L twin-turbo V6 is currently used in the Genesis G80 luxury sedan (RG3 chassis) and the Genesis GV80 luxury SUV (JX1 chassis), specifically in their '3.5T' trim levels from the 2021 model year onwards.
Yes, the G4K3 has significant tuning potential. ECU remaps can safely yield substantial power and torque gains (e.g., +50-70 kW) due to robust internals and twin-turbo design. Supporting modifications like an upgraded intercooler and downpipes are recommended for higher stages of tuning.
Official combined figures are around 10.5-11.5 L/100km (22-27 mpg UK) depending on model (G80/GV80) and wheel size. Real-world mixed driving typically yields 12-15 L/100km (19-24 mpg UK), with highway cruising being significantly more efficient.
Yes. Like virtually all modern DOHC engines, the G4K3 is an interference design. A timing chain failure would likely cause catastrophic valve and piston damage. Fortunately, the chain system is robust and designed for the engine's lifetime with proper oil maintenance.
Genesis mandates the use of Genesis Genuine Oil 5W-30 meeting API SP (or higher) specifications. Using the correct low-viscosity, high-quality synthetic oil is crucial for protecting the turbochargers, timing chain, and managing engine temperatures.
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
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
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