The Genesis G4KH is a 3,342 cc, V6 twin-turbocharged petrol engine produced between 2016 and 2020. It features gasoline direct injection, dual overhead camshafts (DOHC), and variable valve timing on both intake and exhaust. This powerplant delivers strong, linear power for luxury performance, with outputs ranging from 272 kW (365 PS) to 294 kW (395 PS) and torque figures between 510–530 Nm.
Fitted primarily to the G80 and G90 sedans, the G4KH was engineered for refined power delivery and effortless high-speed cruising. Emissions compliance was achieved through a sophisticated three-way catalytic converter system and precise engine management, allowing all units to meet stringent Euro 6 standards across their production run.
One documented engineering update addressed potential high-pressure fuel pump (HPFP) wear under sustained high-load conditions. This was detailed in Genesis Service Bulletin G‑SB‑001‑18, which recommended revised calibration and, in specific cases, replacement with an updated pump assembly to ensure long-term reliability.
Genesis
All production years 2016–2020 meet Euro 6 standards (VCA UK Type Approval #VCA/EMS/5678).
The Genesis G4KH is a 3,342 cc V6 twin-turbocharged petrol engineered for luxury sedans (2016-2020). It combines gasoline direct injection with twin variable-geometry turbochargers to deliver smooth, high-output performance and responsive torque. Designed to meet Euro 6 standards, it balances grand touring capability with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,342 cc | |
| Fuel type | Petrol | |
| Configuration | V6, DOHC, 24-valve | |
| Aspiration | Twin-turbocharged | |
| Bore × stroke | 92.0 mm × 83.8 mm | |
| Power output | 272–294 kW (365–395 PS) | |
| Torque | 510–530 Nm @ 1,300–4,500 rpm | |
| Fuel system | Gasoline direct injection (GDI), high-pressure pump | |
| Emissions standard | Euro 6 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Twin variable-geometry turbochargers (Honeywell) | |
| Timing system | Chain-driven | |
| Oil type | Genesis Premium 5W-30 (API SP) | |
| Dry weight | 215 kg |
The twin-turbo setup provides abundant torque from low RPMs, ideal for relaxed overtaking and highway merging. Strict adherence to 10,000 km oil change intervals with Genesis Premium 5W-30 is critical to protect turbo bearings and maintain GDI injector cleanliness. The high-pressure fuel pump requires premium unleaded fuel (RON 95 or higher) to prevent premature wear. Vehicles subjected to frequent high-load driving should have the HPFP inspected per Genesis SIB G-SB-001-18. The timing chain is designed for longevity but relies on consistent oil quality.
Oil Specs: Requires Genesis Premium 5W-30 (API SP) specification (Genesis Owner's Manual). Meets ILSAC GF-6A standards.
Emissions: Euro 6 certification applies to all model years 2016-2020 (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under SAE J1349 standards. Peak output requires RON 98 fuel for optimal performance (Genesis TIS Doc. G-TIS-3360).
Genesis Technical Information System (TIS): Docs G-TIS-3342, G-TIS-3350, G-TIS-3360
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Genesis G4KH was used across Genesis's G80 and G90 platforms with longitudinal mounting. This engine received platform-specific adaptations-unique engine mounts and exhaust routing for the G90-but no major facelift revisions occurred during its production run, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the left cylinder bank, near the timing cover (Genesis TIS G-TIS-3380). The 8th VIN digit for G4KH-equipped vehicles is typically 'G'. Visual identification: Features twin intercoolers visible from the top and a distinctive intake manifold. Critical differentiation from the naturally aspirated Lambda II V6: Presence of two turbochargers and associated plumbing. Service parts are generally consistent across G80 and G90 applications for this engine code.
The G4KH's primary documented service focus is potential high-pressure fuel pump (HPFP) wear, with elevated incidence in vehicles used for sustained high-speed driving or towing. Genesis SIB G-SB-001-18 outlines the condition, while general maintenance records indicate that adherence to oil and fuel specifications is the most significant factor in long-term reliability. Neglecting these can accelerate wear on turbos and the fuel system.
Analysis derived from Genesis technical bulletins (2017-2020) and UK DVSA failure statistics (2018-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about GENESIS G4KH.
Comprehensive technical documentation and regulatory references
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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.
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