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…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The G4K2 is a modern, well-engineered engine with no widespread critical failures reported. Its main long-term consideration is managing intake valve carbon buildup through periodic cleaning. With adherence to Genesis's maintenance schedule and use of recommended fluids, it is expected to be very reliable.
The most frequently noted items are intake valve carbon buildup (addressed in SIB SI-G4K2-001), occasional minor oil consumption during break-in, and rare coolant sensor faults. These are generally service or maintenance items rather than inherent design flaws leading to breakdowns.
The G4K2 3.5-liter twin-turbo V6 is used in the current generation Genesis G80 luxury sedan and the GV80 luxury SUV, specifically in their '3.5T' trim levels. It is not used in any other Genesis or Hyundai/Kia models.
Yes, the G4K2 has significant tuning potential. ECU remaps can safely increase output. The robust internals and twin-turbo design can handle increased boost. However, tuning will void the factory warranty and may accelerate wear on components like turbos and the transmission.
Official combined figures are approximately 10.5 L/100km (27 mpg UK) for the GV80 and 10.2 L/100km (28 mpg UK) for the G80. Real-world driving, especially in urban settings or with spirited use, will typically see figures in the 12-15 L/100km (19-24 mpg UK) range.
Yes. Like virtually all modern overhead cam engines, the G4K2 is an interference design. A timing chain failure could result in severe engine damage. Fortunately, the chain is designed for the engine's lifetime under normal conditions and with proper oil maintenance.
Genesis specifies 5W-30 viscosity oil meeting the latest API SP (or ILSAC GF-6A) standard. Using Genesis Genuine Oil or a high-quality equivalent that meets this specification is crucial for engine protection, turbo longevity, and maintaining the timing chain.
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
Type-approval guidance and documentation.
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