The Genesis G4K4 is a 2,497 cc, inline‑four turbocharged petrol engine produced from 2021 onwards. It features a dual overhead camshaft (DOHC) design with 16 valves and gasoline direct injection (GDI), paired with a single twin — scroll turbocharger to deliver responsive power. Variable valve timing (CVVT) technology optimises efficiency and performance across the rev range.
Fitted to models such as the GV70 and G80, the G4K4 was engineered for drivers seeking a balanc…
Genesis
Production years 2021–Present meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/5678).
The Genesis G4K4 is a 2,497 cc inline‑four turbocharged petrol engine engineered for luxury SUVs and sedans (2021-Present). It combines gasoline direct injection with a twin-scroll turbocharger to deliver strong low-end torque and efficient cruising. Designed to meet Euro 6d standards, it balances spirited performance with modern emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,497 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 16-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 88.5 mm × 101.6 mm | |
Power output | 223–232 kW (303–315 PS) | |
Torque | 422–447 Nm @ 1,650–4,000 rpm | |
Fuel system | Gasoline Direct Injection (GDI) | |
Emissions standard | Euro 6d | |
Compression ratio | 10.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single twin-scroll turbocharger | |
Timing system | Chain-driven | |
Oil type | Genesis Genuine Oil 5W-30 (API SP) | |
Dry weight | 168 kg |
The Genesis G4K4 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 G4K4's primary maintenance focus is preventing carbon buildup on intake valves and ensuring turbocharger longevity, inherent to its turbo-GDI design. Genesis service data indicates these are manageable conditions with scheduled cleaning and oil changes, 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 G4K4 is engineered for durability with a chain-driven timing system and robust turbocharger. Its main long-term considerations are managing intake valve carbon buildup and turbo health, common to turbo-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 turbocharger wear or oil leaks. Less frequently, fuel injector clogging or coolant leaks from the water pump/thermostat housing may occur. These are well-documented in Genesis service bulletins and have established repair procedures.
The G4K4 2.5L turbo 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 popular and can yield significant power and torque gains due to the robust turbocharged design. Most stage 1 tunes are safe on stock internals. More aggressive tuning may require upgraded intercoolers or downpipes for optimal reliability and heat management.
Official combined figures are around 9.5-10.0 L/100km (30-28 mpg UK) for the GV70 and G80. Real-world mixed driving typically returns 11.0-13.0 L/100km (26-22 mpg UK), heavily influenced by driving style. Highway cruising is more efficient, while urban driving with frequent boost use consumes more fuel.
Yes. The G4K4 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 turbocharger, CVVT 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
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
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