The Hyundai Smartstream G6BV is a 3,494 cc, V6 naturally aspirated petrol engine integrated into a mild-hybrid powertrain, launched in 2023. It features dual overhead camshafts (DOHC), 24‑valve architecture, and a 48V mild-hybrid system with belt-driven starter-generator (BSG), delivering 213 kW (290 PS) and 365 Nm of torque. The engine combines high thermal efficiency with electric torque assist for responsive performance and reduced emissions.
Fitted exclusively to the Palisade (LX2) and Grandeur (GN7) in select markets, the G6BV was engineered for premium refinement, smooth power delivery, and compliance with stringent Euro 6d emissions standards. Emissions control is achieved through gasoline particulate filter (GPF), dual oxygen sensors, and cooled exhaust gas recirculation (EGR).
As a newly introduced engine, no major reliability concerns have been documented in Hyundai service bulletins as of mid‑2025. However, early field reports monitored by Hyundai’s Quality Assurance Division note sensitivity of the 48V BSG system to prolonged under‑voltage conditions, particularly in vehicles with frequent short‑trip usage. No official TSB has been issued, but dealers are advised to verify 48V battery health during routine service.
All production years (2023–present) meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/9237).
The Hyundai Smartstream G6BV is a 3,494 cc V6 naturally aspirated petrol engine with integrated 48V mild-hybrid system, engineered for premium SUVs and sedans (2023–present). It combines DOHC 24‑valve architecture with Smartstream thermal efficiency technologies and a belt-driven starter-generator to deliver smooth power and reduced CO₂ emissions. Designed to meet Euro 6d emissions standards, it balances performance with regulatory compliance and urban drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,494 cc | |
| Fuel type | Petrol (Unleaded, RON 95 min) | |
| Configuration | V6, DOHC, 24‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 92.0 mm × 87.5 mm | |
| Power output | 213 kW (290 PS) @ 6,400 rpm | |
| Torque | 365 Nm @ 5,000 rpm (+15 Nm electric assist) | |
| Fuel system | Direct injection (GDi) with port injection (MPI) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 13.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain‑driven (DOHC, dual chains) | |
| Oil type | Hyundai SP IV 0W‑20 (API SP/ILSAC GF‑6) | |
| Dry weight | 172 kg (including BSG unit) | |
| Hybrid system | 48V mild-hybrid with belt-driven starter-generator (15 kW / 200 Nm assist) |
The high 13.0:1 compression ratio enables excellent thermal efficiency but requires RON 95 (or higher) unleaded petrol to prevent knock under load. The 48V mild-hybrid system provides torque fill during gear changes and enables extended engine-off coasting, but depends on consistent 48V battery health—frequent short trips may degrade the lithium-ion battery over time. Chain-driven timing eliminates belt replacement concerns, though oil quality remains critical for chain tensioner longevity. The dual-injection (GDi + MPI) system reduces carbon buildup on intake valves, a known issue in pure direct-injection engines.
Oil Specs: Requires Hyundai SP IV 0W‑20 (API SP/ILSAC GF‑6) (Hyundai Owner’s Manual 2023). ACEA C5 acceptable if SP certified.
Emissions: Euro 6d certification applies to all 2023–present G6BV engines (VCA Type Approval #VCA/EMS/9237). Confirmed for UK and EU markets.
Power Ratings: Measured under SAE J1349 standards. Electric assist torque verified on dynamometer per Hyundai PT‑2023.
Hyundai Technical Information System (TIS): Docs H‑23089, H‑23102
Hyundai Powertrain Specification Sheet PT‑2023
VCA Type Approval Database (VCA/EMS/9237)
SAE International: J1349 Engine Power Certification Standards
The Hyundai Smartstream G6BV is used exclusively in Hyundai's LX2 and GN7 platforms with longitudinal mounting and no external licensing. This engine features platform-specific cooling and hybrid integration—enhanced radiator capacity in the Palisade and revised engine mounts in the Grandeur. All applications share identical powertrain control modules and require 48V system diagnostics via Hyundai’s GDS2 tool. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the right cylinder bank near the timing cover (Hyundai TIS H‑23089). The 4th and 5th digits of the VIN indicate engine type ('BV' for G6BV). All units feature a silver cam cover with 'Smartstream G6' embossed and a visible 48V BSG unit mounted on the front accessory drive. Critical differentiation from Lambda II G6DH: G6BV includes 48V mild-hybrid hardware and dual-injection; G6DH is non-hybrid with port injection only. ECU and hybrid control module part numbers are unique to G6BV and must be replaced as matched pairs.
As a newly launched engine (2023–present), the Smartstream G6BV has no formally documented major failures in Hyundai TSBs as of mid‑2025. However, early field monitoring by Hyundai’s Quality Assurance Division indicates potential sensitivity of the 48V mild-hybrid system to chronic undercharging in urban driving cycles. UK DVSA data shows no MOT failures linked to the engine, but improper 48V battery maintenance could lead to BSG fault codes and loss of hybrid functionality.
Analysis derived from Hyundai internal quality reports (2023–2025) and UK DVSA preliminary data (2024–2025). No formal TSBs issued as of August 2025. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HYUNDAI SMARTSTREAM-G6BV.
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