The Hyundai G15B is a 1,497 cc, inline‑three turbo‑petrol engine produced between 2017 and 2023. It features direct fuel injection, a single-scroll turbocharger, and dual overhead camshafts (DOHC), delivering 103–120 kW (140–163 PS) with torque between 242–265 Nm. The compact three-cylinder layout enables strong low-end responsiveness and reduced emissions for urban and mixed driving.
Fitted to models such as the i30 (PD), Kona, and Venue, including variants like the 1.5 T-GDi, the G15B was engineered for refined performance, fuel efficiency, and compliance with tightening emissions standards. Emissions control relied on a close-coupled three-way catalyst and particulate filter (GPF), allowing Euro 6d compliance across all markets from launch.
One documented concern is low-speed pre-ignition (LSPI) under high-load conditions, highlighted in Hyundai Service Bulletin HST‑18‑033. This phenomenon, linked to carbon buildup and fuel quality, can cause abnormal combustion and engine knock. From 2020, Hyundai implemented revised piston crown geometry and updated ECU calibration per the bulletin.
All production years (2017–2023) meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/9215).
The Hyundai G15B is a 1,497 cc inline‑three turbo‑petrol engineered for compact hatchbacks and crossovers (2017–2023). It combines gasoline direct injection with a single-scroll turbocharger to deliver responsive low‑rpm torque and efficient urban commuting. Designed to meet Euro 6d from launch, it balances drivability with stringent emissions compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,497 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑3, DOHC, 12‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 75.0 mm × 84.5 mm | |
| Power output | 103–120 kW (140–163 PS) | |
| Torque | 242–265 Nm @ 1,500–3,500 rpm | |
| Fuel system | Direct injection (up to 200 bar) | |
| Emissions standard | Euro 6d (all years) | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single-scroll turbo (Mitsubishi TD025) | |
| Timing system | Chain (front‑mounted; low wear rate) | |
| Oil type | Hyundai SP IV (API SN/SP, ACEA C5, SAE 0W‑20) | |
| Dry weight | 112 kg |
The compact turbocharged three-cylinder layout provides brisk low-end torque but requires strict adherence to 10,000–15,000 km oil change intervals using ACEA C5–compliant 0W‑20 oil to protect turbo bearings and reduce LSPI risk. EN 228 petrol with ≤10 ppm sulfur is mandatory—ethanol blends above E10 accelerate carbon buildup. The GPF demands periodic high-load driving to prevent clogging; frequent short trips may trigger regeneration warnings. Post-2020 models include revised piston crowns and updated ECU maps per Hyundai SIB HST‑18‑033.
Oil Specs: Requires ACEA C5 / Hyundai SP IV (0W-20) specification (Hyundai Owner’s Manual 2020). Not compatible with older SP III or non-C5 oils.
Emissions: Euro 6d certification applies to all model years (2017–2023) (VCA Type Approval #VCA/EMS/9215).
Power Ratings: Measured under SAE J1349 standards. 120 kW output requires EN 228 petrol with ≤10 ppm sulfur (Hyundai TIS Doc. H23‑1300).
Hyundai Technical Information System (TIS): Docs H22‑8501, H22‑8520, SIB HST‑18‑033
VCA Type Approval Database (VCA/EMS/9215)
SAE International: J1349 Engine Power Certification Standards
The Hyundai G15B was used across Hyundai's PD and OS platforms with transverse mounting. This engine received platform-specific adaptations—revised cooling in the i30 PD and compact exhaust routing in the Kona—and from 2020 the facelifted Venue adopted updated piston and ECU hardware, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crank pulley (Hyundai TIS H22‑8501). The 7th VIN digit indicates engine family ('G' for G15 series). Pre-2020 models use standard piston crowns with ECU calibration H23‑1200; post-2020 units use revised pistons and ECU H23‑1300. Critical differentiation from Gamma II engines: G15B has three cylinders, integrated exhaust manifold, and GPF under floor. Service parts require production date verification—piston kits for engines before 03/2020 are incompatible with later units due to crown redesign (Hyundai SIB HST‑18‑033).
The G15B's primary reliability risk is low-speed pre-ignition (LSPI) on early builds, with elevated incidence under aggressive driving with poor fuel quality. Hyundai internal data from 2021 indicated a measurable rate of knock-related DTCs before 80,000 km in non-EN 228 fuel markets, while UK DVSA records show GPF-related MOT advisories rising in high-mileage urban vehicles. Short-trip driving and ethanol-blended fuel increase carbon and LSPI stress, making fuel quality and maintenance critical.
Analysis derived from Hyundai technical bulletins (2018–2022) and UK DVSA failure statistics (2019–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HYUNDAI G15B.
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