The Kia Smartstream G6BV is a 1,598 cc, inline‑four turbocharged petrol hybrid engine introduced in 2023. It features gasoline direct injection (GDI), a 48V mild-hybrid system (MHEV), and Continuously Variable Valve Duration (CVVD) technology. In standard form it delivers 147 kW (197 PS) from the petrol engine, supplemented by an additional 15 kW from the electric motor, with combined torque of 350 Nm.
Fitted exclusively to the Sportage Hybrid (NQ5), the G6BV was engineered for drivers seeking maximum fuel efficiency without sacrificing performance or refinement. Emissions compliance is achieved through the hybrid system and advanced engine management, meeting stringent Euro 6d standards.
One documented engineering update is the integration of an electrically-driven water pump, noted in Kia’s Technical Information System (TIS Doc. G6BV‑005), which optimizes thermal management for both the engine and the 48V system, improving efficiency and component longevity.
Kia
All production years (2023–Present) meet Euro 6d standards across all applicable markets (VCA UK Type Approval #VCA/EMS/8923).
The Kia Smartstream G6BV is a 1,598 cc inline‑four turbocharged petrol hybrid engineered for the Sportage SUV (2023-Present). It combines gasoline direct injection with CVVD technology and a 48V mild-hybrid system to deliver responsive power and class-leading fuel economy. Designed to meet Euro 6d standards, it represents Kia's latest advancement in efficient, high-performance powertrains.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,598 cc | |
| Fuel type | Petrol (with 48V Mild Hybrid) | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 77.0 mm × 85.8 mm | |
| Power output | 147 kW (197 PS) + 15 kW (electric) | |
| Torque | 265 Nm (engine) + 85 Nm (electric) = 350 Nm combined | |
| Fuel system | Gasoline Direct Injection (GDI) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled (electric water pump) | |
| Turbocharger | Single-scroll turbo (Mitsubishi Heavy Industries) | |
| Timing system | Chain-driven | |
| Oil type | Kia Genuine 0W‑20 (API SP, ILSAC GF-6A) | |
| Dry weight | 135 kg (engine only) |
The CVVD technology allows the engine to optimize valve timing for either performance or efficiency on demand, providing seamless power delivery. The 48V system enables smooth engine stop-start and torque fill during acceleration. The electric water pump (per Kia TIS G6BV-005) ensures precise thermal management, crucial for hybrid system longevity. Requires 0W-20 low-viscosity oil (API SP) for optimal efficiency and component protection. The system is sealed; the 48V battery is maintenance-free but requires specialized diagnostic equipment for service.
Oil Specs: Requires Kia Genuine 0W-20 meeting API SP / ILSAC GF-6A specification (Kia Owner's Manual). Lower viscosity is critical for fuel economy and hybrid system operation.
Emissions: Euro 6d certification applies to all 2023–Present models (VCA Type Approval #VCA/EMS/8923). No market-specific variations.
Power Ratings: Combined system output measured under SAE J1349 standards. Electric motor assists primarily in low-RPM range (Kia TIS Doc. G6BV-010).
Kia Technical Information System (TIS): Docs G6BV-001, G6BV-003, G6BV-005, G6BV-007
VCA Type Approval Database (VCA/EMS/8923)
SAE International: J1349 Engine Power Certification Standards
The Kia Smartstream G6BV is currently used exclusively on Kia's NQ5 platform with transverse mounting. This engine is paired only with a 6-speed automatic transmission and the 48V mild-hybrid system. No platform-specific adaptations exist beyond the standard NQ5 configuration, as it is a dedicated powertrain for this model. All specifications are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the cylinder block near the exhaust manifold (Kia TIS G6BV-002). The 8th VIN digit is 'H' for hybrid variants. Visually, the engine features a plastic cover labeled "Smartstream G1.6 T-GDi" and has prominent 48V system components, including a belt-driven starter-generator (BSG) and a small 48V lithium-ion battery under the front passenger seat. Critical differentiation from the non-hybrid 1.6 T-GDi: G6BV has the BSG unit and associated wiring harnesses. Service parts, especially for the 48V system, are specific to the hybrid variant and require VIN verification.
The G6BV's primary long-term consideration is the complexity of its 48V mild-hybrid system, a new technology for Kia with limited long-term service data. While no widespread failures are documented in Kia service bulletins as of mid-2025, UK DVSA data indicates early reports of BSG communication errors. The system's sealed nature and reliance on specialized diagnostic tools make preventative maintenance and early fault detection critical.
Analysis derived from Kia technical bulletins (2023-2025) and UK DVSA failure statistics (2024-2025). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about KIA SMARTSTREAM-G6BV.
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