The Genesis G4KL is a 3,498 cc, V6 twin — turbocharged petrol engine produced from 2021 onwards. It features gasoline direct injection, dual overhead camshafts (DOHC), and twin — scroll turbochargers. Variable valve timing enables a broad torque curve for responsive acceleration across the rev range.
Fitted to the GV80 SUV and G80/G90 sedans, the G4KL was engineered for refined, powerful performance. Emissions compliance is achieved through a sophisticated catalyti…
Genesis
All production years (2021–Present) meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/5678).
The Genesis G4KL is a 3,498 cc V6 twin-turbocharged petrol engine engineered for luxury SUVs and sedans (2021-Present). It combines direct fuel injection with twin-scroll turbochargers to deliver potent, linear power delivery. Designed to meet Euro 6d standards, it balances high 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 | 274–304 kW (374–414 PS) | |
Torque | 530–550 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 (Mitsubishi Heavy Industries) | |
Timing system | Chain-driven | |
Oil type | Genesis Genuine Oil 0W-30 (API SP) | |
Dry weight | 212 kg |
The Genesis G4KL was used across Genesis's GV80 and G80/G90 platforms with longitudinal mounting. This engine received platform-specific adaptations-unique engine mounts for the GV80 SUV and a specific exhaust routing for the G90 sedan. All adaptations are documented in OEM technical bulletins.
The G4KL's primary focus is managing thermal stress under high load. Genesis TSB-21-08-001 notes potential for coolant system strain during sustained high-speed operation or towing, while routine maintenance minimizes most other risks. Aggressive driving without adequate warm-up can accelerate turbocharger wear, making adherence to service schedules critical.
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 G4KL is a modern, robust engine designed for luxury applications. Its primary long-term consideration is managing heat and maintaining lubrication for the turbochargers. With strict adherence to service intervals using the correct 0W-30 oil, it demonstrates excellent durability. Avoiding excessive idling after hard driving also prolongs turbo life.
The most frequently documented issues involve potential turbocharger wear if maintenance is neglected, carbon buildup on intake valves inherent to GDI engines, and occasional coolant leaks from hoses or the water pump. These are addressed in Genesis service bulletins and are manageable with proper care.
The 3.5-liter twin-turbo G4KL engine is found in the Genesis GV80 SUV (2021–present), the Genesis G80 sedan (2021–present), and the flagship Genesis G90 sedan (2022–present), typically badged as '3.5T' or '3.5T Sport'.
Yes, the G4KL responds well to ECU remapping, with Stage 1 tunes typically adding 30-50 kW and significant torque. The engine's internals are strong, but supporting modifications like an upgraded intercooler and downpipes are recommended for higher stages to manage increased heat and airflow.
Fuel economy is respectable for its power. Expect combined figures around 10.5-12.0 L/100km (23-27 mpg UK) depending on the model (GV80, G80, G90) and driving style. Highway cruising can yield ~8.5 L/100km (33 mpg UK), while city driving may be 14.0 L/100km (20 mpg UK) or higher.
Yes. Like virtually all modern DOHC engines, the G4KL is an interference design. If the timing chain were to fail catastrophically, valve and piston contact would cause severe internal engine damage. Fortunately, the chain system is very robust with proper maintenance.
Genesis mandates the use of Genesis Genuine Oil 0W-30 meeting API SP (or newer) specifications. This low-viscosity, fully synthetic oil is crucial for protecting the turbochargers, ensuring optimal variable valve timing operation, and maximizing fuel efficiency. Change intervals should not exceed 10,000 km.
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.