The Genesis G4K5 is a 3,497 cc, V6 petrol engine produced from 2021 onwards. It features a dual overhead camshaft (DOHC) design with 24 valves and gasoline direct injection (GDI), delivering a balance of power and refinement. Variable valve timing (CVVD) technology enables optimised performance and efficiency across the rev range.
Fitted to models such as the GV70 and G80, the G4K5 was engineered for drivers seeking a blend of spirited acceleration and composed, quiet cr…
Genesis
Production years 2021–Present meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/5678).
The Genesis G4K5 is a 3,497 cc V6 petrol engine engineered for luxury SUVs and sedans (2021-Present). It combines gasoline direct injection with Continuously Variable Valve Duration (CVVD) to deliver smooth, responsive power and refined cruising. Designed to meet Euro 6d standards, it balances high performance with modern emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,497 cc | |
Fuel type | Petrol | |
Configuration | V6, DOHC, 24-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 92.0 mm × 87.7 mm | |
Power output | 213–223 kW (289–303 PS) | |
Torque | 353–362 Nm @ 5,000 rpm | |
Fuel system | Gasoline Direct Injection (GDI) | |
Emissions standard | Euro 6d | |
Compression ratio | 10.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | None | |
Timing system | Chain-driven | |
Oil type | Genesis Genuine Oil 5W-30 (API SP) | |
Dry weight | 187 kg |
The Genesis G4K5 was used across Genesis's GV70 and G80 platforms with longitudinal mounting. This engine received platform-specific adaptations-Electronic Throttle Control calibration for the GV70 and revised engine mounts for the G80-creating minor ECU and hardware variations. All adaptations are documented in OEM technical bulletins.
The G4K5's primary maintenance focus is preventing carbon buildup on intake valves, inherent to its GDI design. Genesis service data indicates this is a manageable condition with scheduled cleaning, while UK DVSA records show no elevated failure rates for this engine. Adherence to the specific oil and fuel recommendations is critical for long-term reliability.
Analysis derived from Genesis technical bulletins (2021-2024) and UK DVSA failure statistics (2022-2024). 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 G4K5 is engineered for durability with a chain-driven timing system. Its main long-term consideration is managing intake valve carbon buildup, common to GDI engines. Following Genesis's specific maintenance schedule for cleaning and using the correct 5W-30 oil ensures excellent long-term reliability.
The most common issues are intake valve carbon buildup and potential fuel injector clogging. Less frequently, CVVD actuator faults or coolant leaks from the thermostat housing may occur. These are well-documented in Genesis service bulletins and have established repair procedures.
The G4K5 3.5L V6 petrol engine is used in the current generation Genesis GV70 SUV and G80 sedan, specifically in their '2.5T' trim levels from 2021 to the present. It is not used in any other Genesis or Hyundai/Kia models.
Yes, ECU remapping is possible and can yield modest power gains. However, as a naturally aspirated engine, significant power increases require major internal modifications. Most tuning focuses on throttle response and torque curve optimisation rather than large peak power gains.
Official combined figures are around 9.0-9.5 L/100km (31-30 mpg UK) for the GV70 and G80. Real-world mixed driving typically returns 10.5-12.5 L/100km (27-23 mpg UK), depending heavily on driving style and conditions. Highway cruising is more efficient.
Yes. The G4K5 is an interference engine. If the timing chain were to fail or jump, the pistons would collide with the open valves, causing catastrophic internal engine damage. Fortunately, the chain system is very robust with proper maintenance.
Genesis mandates the use of Genesis Genuine Oil 5W-30 meeting API SP specifications. Using this exact oil is crucial for protecting the CVVD system and ensuring proper lubrication under all operating conditions. Change intervals should not exceed 10,000 km or 12 months.
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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