The Genesis G4K2 is a 3,497 cc, V6 twin-turbocharged petrol engine introduced in 2021 for the brand's flagship models. It features gasoline direct injection, dual continuously variable valve timing (CVVT), and an aluminum block/heads for reduced weight. Peak output is rated at 294 kW (400 PS), delivering 530 Nm of torque, enabling strong, linear acceleration.
Fitted exclusively to the GV80 SUV and G80 sedan, the G4K2 was engineered for refined, effortless performance and quiet operation. Emissions compliance is achieved through a sophisticated three-way catalytic converter system and particulate filter (GPF), meeting stringent Euro 6d standards across all markets.
One documented area for attention is the potential for carbon buildup on intake valves, a common trait of direct-injection engines. Genesis Service Information Bulletin SI-G4K2-001 recommends periodic inspection and cleaning procedures using approved methods to maintain optimal airflow and combustion efficiency.
Genesis
All production years (2021–Present) meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/5678).
The Genesis G4K2 is a 3,497 cc V6 twin-turbo petrol engineered for flagship luxury SUVs and sedans (2021-Present). It combines direct injection with twin-scroll turbochargers to deliver powerful, smooth acceleration and quiet refinement. Designed to meet Euro 6d standards, it balances high performance with modern emissions control.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,497 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 turbochargers (IHI) | |
| Timing system | Chain-driven | |
| Oil type | Genesis Genuine Oil 5W-30 (API SP) | |
| Dry weight | 215 kg |
The twin-turbo setup provides abundant torque from low RPMs, ideal for relaxed cruising and confident overtaking. To mitigate direct-injection carbon buildup, Genesis recommends using Top Tier detergent fuel and adhering to the 15,000 km service interval for intake system inspection. The chain-driven timing system is designed for longevity but requires correct oil specification (5W-30 API SP) to ensure lubrication. Coolant should be replaced per the 10-year/160,000 km schedule outlined in the owner's manual.
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 (2021–Present) (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under SAE J1349 standards. Output figures are for standard tune (Genesis TIS Doc. G-V6-TT-01).
Genesis Technical Information System (TIS): Docs G-V6-TT-01, G-3497-V6
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Genesis G4K2 was developed for Genesis's GV80 and G80 platforms with longitudinal mounting. This engine features platform-specific calibrations for the GV80's SUV weight and the G80's sedan dynamics. All applications are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, near the alternator (Genesis TIS G-V6-ID-01). The 8th digit of the VIN is 'K' for the 3.5T variant. 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. Service parts are generally consistent across GV80 and G80 applications for this engine code.
The G4K2's primary documented service consideration is intake valve carbon buildup, common to direct-injection engines. Genesis service bulletins provide specific cleaning procedures, while owner feedback indicates this is a manageable maintenance item rather than a critical failure. Using recommended fuel and adhering to service intervals are key preventative measures.
Analysis derived from Genesis technical bulletins (2021-2024) and aggregated owner service data (2021-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about GENESIS G4K2.
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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