The Hyundai G3LC is a 1,497 cc, inline‑three turbo‑petrol engine produced between 2018 and 2024. It features a 12‑valve DOHC layout, direct fuel injection, and a single twin‑scroll turbocharger. In standard form it delivered 110–147 kW (150–200 PS) and torque figures ranging from 265–265 Nm, depending on calibration and model application.
Fitted to models such as the Hyundai i30 (PD), Kona (OS), and Tucson (NX4), the G3LC was engineered for responsive urban performanc…
Hyundai
All production years 2018–2024 meet Euro 6d TEMP (2018–2019) or Euro 6d (2020–2024) standards (VCA UK Type Approval #VCA/EMS/8912).
The Hyundai G3LC is a 1,497 cc inline‑three turbo‑petrol engineered for compact hatchbacks and SUVs (2018–2024). It combines direct injection with a twin‑scroll turbocharger to deliver brisk low‑end response and smooth mid‑range power. Designed to meet Euro 6d TEMP and Euro 6d emissions standards, it balances performance with stringent particulate and NOx 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 | 110–147 kW (150–200 PS) | |
Torque | 265 Nm @ 1,500–3,500 rpm | |
Fuel system | Direct injection (up to 200 bar) | |
Emissions standard | Euro 6d TEMP (2018–2019); Euro 6d (2020–2024) | |
Compression ratio | 10.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single twin‑scroll turbo (BorgWarner) | |
Timing system | Chain (front‑mounted) | |
Oil type | Hyundai SP IV (ACEA C5, SAE 0W‑20) | |
Dry weight | 108 kg |
The Hyundai G3LC was used across Hyundai's PD, OS, and NX4 platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—reinforced engine mounts in the Kona OS and revised intake manifolds in the Tucson NX4—and from 2020 the i30 PD facelift introduced updated piston crowns and ECU calibrations to address LSPI, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
The G3LC's primary reliability risk is low-speed pre-ignition (LSPI) on early builds, with elevated incidence in aggressive urban driving or towing. Hyundai internal durability reports from 2020 indicated a measurable share of pre-2020 engines experiencing LSPI-related knock events, while UK DVSA data shows GPF-related warning lights increasing in vehicles with chronic short-trip usage. High-load, low-RPM operation and improper oil specification amplify LSPI and GPF stress, making fuel quality, oil spec, and driving pattern critical.
Analysis derived from Hyundai technical bulletins (2018–2024) and UK DVSA failure statistics (2020–2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The G3LC offers responsive performance and good efficiency, but early models (2018–2019) are prone to LSPI under aggressive driving. Post-2020 revisions with updated pistons and calibration significantly improved robustness. With correct 0W‑20 oil, RON 95+ fuel, and avoidance of chronic short trips, well-maintained examples can exceed 200,000 km reliably.
Top issues include low-speed pre-ignition (pre‑2020), GPF clogging from short trips, turbo wastegate rattle, and high-pressure fuel pump wear. These are documented in Hyundai service bulletins TSB‑18‑G3LC‑03 and related TIS updates.
The G3LC 1.5L inline‑3 turbo‑petrol was used in the i30 (PD, 2018–2024), Kona (OS, 2018–2024), and Tucson (NX4, 2020–2024) as the 1.5 T‑GDi. It was not licensed to other manufacturers and is exclusive to Hyundai’s small‑car and SUV lineup.
Yes. Stage 1 ECU remaps typically yield +15–25 kW and +40–60 Nm safely, as the turbo and internals are robust. However, LSPI risk increases with aggressive tuning—supporting upgrades (fuel system, intercooler) and conservative timing are recommended for sustained high-load use.
In an i30 1.5 T‑GDi, expect ~7.8 L/100km (city) and ~5.4 L/100km (highway), or ~42 mpg UK combined. Real-world mixed driving typically yields 38–45 mpg UK, depending on load, terrain, and GPF regeneration frequency.
Yes. The G3LC is an interference engine. Timing chain failure—though rare due to front-mounted design—could cause piston-to-valve contact and catastrophic damage. However, chain issues are not a common failure mode on this engine.
Hyundai specifies SAE 0W‑20 oil meeting ACEA C5 and Hyundai SP IV standards. This low-SAPS formulation protects the GPF and reduces LSPI risk. Oil changes every 10,000 km (or 12 months) are critical for engine and emissions system longevity.
Comprehensive technical documentation and regulatory references
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