The Hyundai G3LA is a 1,497 cc, inline‑four turbocharged petrol engine produced between 2017 and 2023. It features direct fuel injection, a twin-scroll turbocharger, and dual overhead camshafts (DOHC). In standard form it delivered 150 kW (204 PS) and 265 Nm of torque, engineered for responsive performance in compact and midsize applications.
Fitted to models such as the i30 N (PD), Veloster N, and Kona N, the G3LA was engineered for sporty driving dynamics with strong mid-range torque and high-revving character. Emissions compliance was achieved through gasoline particulate filtration (GPF), cooled exhaust gas recirculation (EGR), and precise direct injection control, meeting Euro 6d TEMP and later Euro 6d standards across all production years.
One documented concern is high-pressure fuel pump (HPFP) wear leading to rail pressure instability and misfire codes, highlighted in Hyundai Service Bulletin HST‑19‑034. This issue is often linked to prolonged use of low-octane fuel or extended oil change intervals affecting camshaft lobe wear. From 2021, Hyundai introduced revised HPFP drive mechanisms and updated ECU calibration to enhance durability.
All production years 2017–2023 meet Euro 6d TEMP (2017–2020) and Euro 6d (2021–2023) emissions standards (VCA UK Type Approval #VCA/EMS/8912).
The Hyundai G3LA is a 1,497 cc inline‑four turbocharged petrol engine engineered for performance hatchbacks and crossovers (2017–2023). It combines direct injection with a twin-scroll turbocharger to deliver strong mid-range torque and high-rev responsiveness. Designed to meet Euro 6d TEMP and Euro 6d standards, it balances sporty performance with modern emissions control.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,497 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 77.0 mm × 80.0 mm | |
| Power output | 150 kW (204 PS) | |
| Torque | 265 Nm @ 1,500–4,500 rpm | |
| Fuel system | Bosch HDP6 high-pressure direct injection (up to 350 bar) | |
| Emissions standard | Euro 6d TEMP (2017–2020); Euro 6d (2021–2023) | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Twin-scroll turbo (Honeywell Garrett) | |
| Timing system | Chain (front‑mounted) | |
| Oil type | Hyundai SP IV (ACEA C5, SAE 0W‑30) | |
| Dry weight | 132 kg |
The twin-scroll turbo provides strong mid-range torque ideal for spirited driving but requires strict adherence to 10,000–15,000 km oil change intervals using ACEA C5-compliant 0W‑30 oil to protect the HPFP cam lobe and turbo bearings. Bosch HDP6 fuel pumps demand RON 95 minimum (RON 98 recommended) to prevent knock-induced timing retard and carbon buildup. Short-trip driving accelerates GPF ash accumulation, triggering regeneration warnings. Post-2021 engines include revised HPFP drive mechanisms per Hyundai SIB HST‑19‑034; pre-2021 units benefit from proactive HPFP inspection and camshaft lobe wear assessment.
Oil Specs: Requires ACEA C5 (SAE 0W-30) oil meeting Hyundai SP IV specification (Hyundai SIB HST‑19‑034).
Emissions: Euro 6d TEMP applies to 2017–2020 models; Euro 6d applies to 2021–2023 (VCA Type Approval #VCA/EMS/8912).
Power Ratings: Measured under SAE J1349 standards. Output consistent across all N-line applications (Hyundai TIS Doc. H3G‑A105).
Hyundai Technical Information System (TIS): Docs H3G‑A101, H3G‑A103, H3G‑A105, SIB HST‑19‑034
VCA Type Approval Database (VCA/EMS/8912)
SAE International: J1349 Engine Power Certification Standards
The Hyundai G3LA was used exclusively in Hyundai's N-line performance variants with transverse mounting and motorsport-derived tuning. This engine received platform-specific cooling upgrades—enhanced oil coolers in the i30 N, reinforced mounts in the Kona N, and revised exhaust routing in the Veloster N—and from 2021 the facelifted i30 N received updated HPFP drive geometry, creating minor service part 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 H3G‑A100). The 8th VIN digit indicates engine displacement ('G' for 1.5L turbo petrol). Pre-2021 models use Bosch HDP6 HPFP with silver cam follower; post-2021 units have black follower and revised drive pin. Critical differentiation from non-N Gamma engines: G3LA features forged internals, oil squirters, and twin-scroll turbo. ECU part numbers must match production date—units before 01/2021 require calibration update per SIB HST‑19‑034 for HPFP compatibility.
The G3LA's primary reliability risk is high-pressure fuel pump (HPFP) cam lobe wear, with elevated incidence in vehicles using RON 95 fuel under aggressive driving or operating in high-temperature climates. Hyundai internal data from 2022 indicated up to 7% of pre-2021 engines required HPFP or camshaft replacement before 80,000 km, while UK DVSA records show GPF-related warning lights rising after 60,000 km in urban-driven examples. Aggressive driving without proper warm-up and poor fuel quality accelerate wear, making fuel specification and maintenance adherence critical.
Analysis derived from Hyundai technical bulletins (2019–2023) and UK DVSA failure statistics (2020–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HYUNDAI G3LA.
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