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 exclusiv…
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 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.
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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.
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As a newly introduced engine (2023–present), long-term data is limited. Early indications suggest strong reliability due to chain-driven timing, dual-injection (reducing carbon buildup), and robust thermal design. However, 48V battery health requires attention in short-trip usage. With proper maintenance, it is expected to exceed 250,000 km.
No major failures are documented yet. Potential early concerns include 48V battery degradation from short trips, GPF regeneration issues in urban driving, minor coolant leaks from plastic thermostat housing, and BSG belt noise. These are monitored but not yet subject to official TSBs.
The G6BV is currently used only in the Hyundai Palisade (LX2, 2023–present) and Grandeur (GN7, 2023–present) in Calligraphy and Limited trims. Both are Euro 6d compliant premium vehicles with longitudinal V6 mild-hybrid powertrains.
Modest ECU remapping is possible (+10–15 kW), but the high 13.0:1 compression ratio limits aggressive tuning without risking knock. The 48V system does not support significant electric boost increases. Forced induction is not feasible due to non-forged internals and combustion chamber design.
In a 2024 Palisade Calligraphy, real-world consumption is ~11.8 L/100km (city) and ~8.4 L/100km (highway), or about 24 mpg UK combined. The 48V system improves stop-start efficiency and coasting, but the large displacement limits economy. Expect 25–27 mpg UK on mixed routes.
Yes. The G6BV is an interference engine. However, it uses a durable chain-driven timing system with no scheduled replacement interval, significantly reducing failure risk compared to belt-driven designs. Chain wear is minimal with correct oil and maintenance.
Hyundai specifies SP IV 0W‑20 (API SP/ILSAC GF‑6) synthetic oil. This low-viscosity oil is critical for fuel economy, chain lubrication, and 48V system compatibility. Change every 15,000 km or 12 months. Full synthetic is mandatory.
Comprehensive technical documentation and regulatory references
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EU regulations are referenced using CELEX identifiers for long-term stability.
HYUNDAI 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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