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 refined, powerful, and responsive driving experience. It targets drivers seeking effortless performance combined with luxury comfort. Emissions compliance is achieved through advanced engine management and catalytic conversion, meeting stringent Euro 6d standards.
One documented area for attention is potential carbon buildup on intake valves, a known characteristic of direct-injection engines. Genesis addresses this through specific service procedures outlined in Technical Service Bulletin TSB-22-08-001, which details cleaning protocols and preventative maintenance schedules to ensure optimal airflow and performance.
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 twin-turbo setup provides strong, lag-free torque ideal for highway merging and towing, but requires adherence to 10,000 km or 12-month oil change intervals to manage soot and maintain turbo health. Genesis Genuine 5W-30 oil is critical for its specific additive package protecting turbo bearings and chain components. To mitigate GDI-related carbon buildup on intake valves, periodic cleaning per TSB-22-08-001 is recommended, especially for vehicles with predominantly short urban journeys. The engine's design prioritizes refinement; NVH levels are exceptionally low under normal operation.
Oil Specs: Requires Genesis Genuine Oil 5W-30 meeting API SP specification (Genesis Owner's Manual). ACEA C2/C3 oils are not approved.
Emissions: Euro 6d certification applies to all 2021–Present models (VCA Type Approval #VCA/EMS/5678). Includes RDE (Real Driving Emissions) compliance.
Power Ratings: Measured under SAE J1349 standards. Output figures are for standard tune; no factory performance variants exist (Genesis TIS Doc. G-TIS-5020).
Genesis Technical Information System (TIS): Docs G-TIS-5012, G-TIS-5015, G-TIS-5020
Genesis Service Information Bulletin (TSB-22-08-001)
VCA Type Approval Database (VCA/EMS/5678)
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.
Locate the engine code stamped on the front of the left cylinder bank, near the timing cover (Genesis TIS G-TIS-5001). The 8th digit of the VIN is 'G' for the 3.5T G4K6 engine. Visually, the engine is identifiable by its twin turbochargers mounted within the 'hot V' of the cylinder banks and the prominent '3.5 T-GDI' badge on the engine cover. Critical differentiation from the naturally aspirated 3.5L (G6DT): The G4K6 has visible turbochargers and intercoolers, while the G6DT does not. Service parts are generally interchangeable between GV80 and G80 applications for the same model year.
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.
Find answers to most commonly asked questions about GENESIS G4K6.
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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