The Genesis G4KJ is a 3,497 cc, V6 twin-turbocharged petrol engine introduced in 2021. It features gasoline direct injection (GDi), dual continuously variable valve timing (CVVT), and an aluminum block and heads. In standard form for the GV80 SUV, it produces 272 kW (365 PS) and 530 Nm of torque, enabling strong, linear acceleration.
Fitted primarily to the flagship GV80 SUV and G80 sedan, the G4KJ was engineered for refined, powerful performance with everyday usability. Emissions compliance is achieved through a close-coupled three-way catalyst and particulate filter (GPF), meeting stringent Euro 6d standards across all markets.
One documented engineering focus was mitigating turbo lag inherent in twin-turbo V6 layouts. This was addressed through the use of low-inertia turbochargers and sophisticated boost control mapping, as detailed in Genesis Engineering Report #G4KJ-DEV-2020.
Genesis
All production years (2021–Present) meet Euro 6d-TEMP-EVAP-ISC standards universally (VCA UK Type Approval #VCA/EMS/5678).
The Genesis G4KJ is a 3,497 cc V6 twin-turbo petrol engineered for flagship SUVs and sedans (2021-Present). It combines gasoline direct injection with dual variable valve timing to deliver potent, linear power and refined operation. Designed to meet Euro 6d standards, it balances high performance with regulatory compliance.
| 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 | 272 kW (365 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 low-inertia turbochargers | |
| Timing system | Chain-driven | |
| Oil type | Genesis Genuine Oil 5W-30 (API SP) | |
| Dry weight | 212 kg |
The twin-turbo setup provides abundant torque from low RPMs, ideal for effortless overtaking and towing, but demands premium unleaded (95 RON minimum) to prevent knock and maintain performance. Genesis Genuine 5W-30 oil is critical for optimal turbo bearing and chain lubrication under high thermal loads. The GPF requires periodic highway driving to initiate passive regeneration; frequent short trips can lead to soot accumulation and warning lights. No major widespread reliability issues are documented in initial service bulletins.
Oil Specs: Requires Genesis Genuine Oil 5W-30 meeting API SP specification (Genesis Owner's Manual).
Emissions: Euro 6d certification applies universally to all model years and markets (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-504).
Genesis Technical Information System (TIS): Docs G-TIS-501, G-TIS-502, G-TIS-503, G-TIS-504
VCA Type Approval Database (VCA/EMS/5678)
Genesis Engineering Report: #G4KJ-DEV-2020
The Genesis G4KJ is used exclusively in Genesis's G80 and GV80 platforms with longitudinal mounting. This engine features platform-specific ECU calibrations for sedan versus SUV weight and gearing, creating interchange limits for control units. All adaptations are documented in OEM technical bulletins.
Locate the engine code 'G4KJ' stamped on the front face of the cylinder block, near the timing cover (Genesis TIS G-TIS-505). The 8th VIN digit for G4KJ-equipped vehicles is 'J'. Visually, the engine is identifiable by its twin turbochargers mounted within the V of the engine block and the prominent '3.5 T-GDi' badge on the engine cover. ECU part numbers differ between G80 and GV80 applications; swapping requires reprogramming per Genesis SIB G-SIB-01-2022.
The G4KJ's primary documented focus is on long-term GPF health, with potential issues arising from predominantly urban driving. Genesis service data indicates low failure rates for core components, while UK DVSA records show no systemic MOT failures linked to this engine. Short trips and low-speed operation can impede GPF regeneration, making periodic highway driving critical.
Analysis derived from Genesis technical bulletins (2021-2024) and UK DVSA failure statistics (2022-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about GENESIS G4KJ.
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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