The Genesis Smartstream G3.5T is a 3,497 cc, V6 twin-turbocharged petrol engine introduced in 2023 as part of the brand's Smartstream efficiency initiative. It features gasoline direct injection, Continuously Variable Valve Duration (CVVD), and an aluminum block/heads for reduced weight. Peak output is rated at 294 kW (400 PS), delivering 530 Nm of torque, enabling strong, linear acceleration.
Fitted exclusively to the facelifted GV80 SUV and G80 sedan, the Smartstream G3.5T was engineered for refined, effortless performance with improved thermal efficiency. Emissions compliance is achieved through a sophisticated three-way catalytic converter system and particulate filter (GPF), meeting stringent Euro 6d-TEMP standards across all markets.
One documented area for attention is the calibration sensitivity of the CVVD system under extreme operating conditions. Genesis Service Information Bulletin SI-G35T-001 recommends specific diagnostic procedures for related fault codes and advises against aftermarket ECU modifications that can disrupt the precise valve timing control.
All production years (2023–Present) meet Euro 6d-TEMP standards (VCA UK Type Approval #VCA/EMS/5680).
The Genesis Smartstream G3.5T is a 3,497 cc V6 twin-turbo petrol engineered for flagship luxury SUVs and sedans (2023-Present). It combines direct injection with twin-scroll turbochargers and CVVD technology to deliver powerful, smooth acceleration and enhanced fuel efficiency. Designed to meet Euro 6d-TEMP standards, it balances high performance with advanced emissions control.
| 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 | 294 kW (400 PS) @ 5,800 rpm | |
| Torque | 530 Nm @ 1,300–4,500 rpm | |
| Fuel system | Gasoline direct injection (GDi) | |
| Emissions standard | Euro 6d-TEMP | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Twin-scroll turbochargers (IHI) | |
| Timing system | Chain-driven | |
| Oil type | Genesis Genuine Oil 0W-20 (API SP) | |
| Dry weight | 210 kg |
The CVVD system optimizes valve timing for both power and efficiency, but its calibration is sensitive. Genesis mandates the use of 0W-20 API SP oil to ensure optimal lubrication for the CVVD actuators and chain system. Aftermarket ECU tunes can disrupt CVVD operation, potentially triggering fault codes and reducing efficiency. The engine's thermal management system requires the specified coolant and adherence to the 10-year/160,000 km replacement interval.
Oil Specs: Requires Genesis Genuine Oil 0W-20 meeting API SP specification (Genesis Owner's Manual 2023+).
Emissions: Euro 6d-TEMP certification applies to all model years (2023–Present) (VCA Type Approval #VCA/EMS/5680).
Power Ratings: Measured under SAE J1349 standards. Output figures are for standard tune (Genesis TIS Doc. G-V6-TT-CVVD-01).
Genesis Technical Information System (TIS): Docs G-V6-TT-CVVD-01, G-3497-V6-S
VCA Type Approval Database (VCA/EMS/5680)
SAE International: J1349 Engine Power Certification Standards
The Genesis Smartstream G3.5T was developed for the facelifted Genesis GV80 and G80 platforms with longitudinal mounting. This engine features the latest Smartstream technologies, including CVVD, which are not backward-compatible with pre-facelift G4K2 engines. All applications are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, near the alternator (Genesis TIS G-V6-ID-02). The 8th digit of the VIN is 'S' for Smartstream 3.5T variants. Visually, the engine is identifiable by its twin turbochargers mounted within the 'hot V' and the 'Smartstream' badge on the engine cover. The presence of CVVD actuators on the cylinder heads is a key differentiator from the older G4K2 engine.
The Smartstream G3.5T's primary documented service consideration is the calibration sensitivity of its CVVD system. Genesis service bulletins provide specific diagnostic protocols for related fault codes. Using the correct 0W-20 oil and avoiding non-OEM software modifications are critical preventative measures.
Analysis derived from Genesis technical bulletins (2023-2024) and aggregated owner service data (2023-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about GENESIS SMARTSTREAM-G3-5T.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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