The Genesis G4K3 is a 3,498 cc, V6 twin-turbocharged petrol engine introduced in 2021. It features gasoline direct injection (GDi), dual overhead camshafts (DOHC), and a twin-scroll turbocharger system. This powertrain delivers strong, linear power for a refined driving experience, producing 294 kW (400 PS) and 530 Nm of torque.
Fitted primarily to the GV80 SUV and G80 sedan, the G4K3 was engineered for drivers seeking a blend of luxury, effortless performance, and quiet refinement. Emissions compliance is achieved through a gasoline particulate filter (GPF) and advanced engine management, meeting stringent Euro 6d standards across all markets.
One documented area for attention is potential carbon buildup on intake valves, a known characteristic of direct-injection engines. This is addressed in Genesis Service Bulletin TSB-21-08-001, which outlines revised service intervals for walnut-shell blasting on high-mileage or predominantly urban-driven vehicles to maintain optimal airflow and combustion efficiency.
Genesis
All production years (2021–Present) meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/5678).
The Genesis G4K3 is a 3,498 cc V6 twin-turbocharged petrol engine engineered for luxury SUVs and sedans (2021–Present). It combines gasoline direct injection with twin-scroll turbochargers to deliver smooth, high-torque performance and responsive power. Designed to meet Euro 6d standards, it balances exhilarating performance with regulatory 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) | |
| 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, water-cooled (Honeywell) | |
| Timing system | Chain-driven | |
| Oil type | Genesis Genuine Oil 5W-30 (API SP) | |
| Dry weight | 218 kg |
The twin-turbo setup provides abundant torque from low RPMs, ideal for relaxed cruising and confident overtaking. To mitigate carbon buildup inherent in GDi systems, Genesis recommends periodic intake valve cleaning (walnut blasting) for vehicles exceeding 80,000 km or driven primarily in stop-start conditions, as per TSB-21-08-001. Using only Genesis-approved 5W-30 oil is critical for turbocharger and chain longevity. The engine's design prioritizes refinement; aggressive driving may trigger earlier maintenance for components like spark plugs and ignition coils.
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 is consistent across GV80 and G80 applications (Genesis TIS Doc. G-TIS-7760).
Genesis Technical Information System (TIS): Docs G-TIS-7745, G-TIS-7750, G-TIS-7755, TSB-21-08-001
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Genesis G4K3 was developed for Genesis's flagship G80 and GV80 platforms with longitudinal mounting. This engine features platform-specific tuning for the GV80's SUV weight and the G80's sedan dynamics. All adaptations are documented in OEM technical bulletins.
The engine code 'G4K3' is cast into the engine block on the driver's side, near the front cylinder bank (Genesis TIS G-TIS-7770). The 8th digit of the VIN is 'K' for all G4K3-equipped vehicles. Visually, the engine is identifiable by its twin-turbochargers mounted within the 'hot-V' of the cylinder banks and its black plastic engine cover with '3.5 T-GDi' branding. Service parts are generally interchangeable between G80 and GV80 applications, but ECU calibration files differ and must be matched to the specific vehicle model and year.
The G4K3's primary documented concern is potential carbon buildup on intake valves, a trait common to direct-injection engines. Genesis TSB-21-08-001 outlines a preventative maintenance procedure for high-mileage vehicles, while owner feedback suggests spark plug longevity can vary under aggressive driving. Regular adherence to the specified 5W-30 oil and proactive cleaning can mitigate these concerns.
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 G4K3.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with GENESIS or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialGENESIS documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
