The Hyundai G6DG is a 2,199 cc, inline‑four turbo‑diesel engine produced between 2015 and 2023. It features dual overhead camshafts (DOHC), 16 valves, and common‑rail direct fuel injection. In standard form it delivered 147 kW (200 PS) at 4,000 rpm and 440 Nm of torque at 1,750–2,750 rpm, providing strong low‑end pull and refined highway performance.
Fitted to models such as the Santa Fe (DM), Grandeur (IG), and Tucson (TL), the G6DG was engineered for mid‑size and large applications prioritizing torque, towing capability, and compliance with stringent emissions standards. Emissions control was achieved through a cooled exhaust gas recirculation (EGR) system, diesel oxidation catalyst (DOC), diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue, enabling full Euro 6 compliance across all production years.
One documented concern is premature wear of the high-pressure fuel pump drive mechanism, which can lead to loss of rail pressure and limp‑mode activation. This issue, highlighted in Hyundai Service Bulletin EM‑17‑12, is often linked to marginal lubrication during cold starts or use of non‑specification diesel. From 2018, Hyundai revised the pump drive coupling and updated calibration strategies to improve durability.
Hyundai
All production years 2015–2023 meet Euro 6 standards (VCA UK Type Approval #VCA/EMS/9563).
The Hyundai G6DG is a 2,199 cc inline‑four turbo‑diesel engine engineered for SUVs and executive sedans (2015–2023). It combines DOHC architecture with high-pressure common‑rail injection and a variable‑geometry turbocharger to deliver robust torque and smooth operation. Designed to meet Euro 6 emissions standards, it integrates SCR/AdBlue technology alongside DPF and EGR systems for full regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,199 cc | |
| Fuel type | Diesel (Ultra‑low sulfur) | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 88.0 mm × 90.0 mm | |
| Power output | 147 kW (200 PS) @ 4,000 rpm | |
| Torque | 440 Nm @ 1,750–2,750 rpm | |
| Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
| Emissions standard | Euro 6 | |
| Compression ratio | 15.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single variable‑geometry turbo (VGT) | |
| Timing system | Chain (maintenance‑free design) | |
| Oil type | Hyundai SP 5W‑30 (ACEA C2/C3, API SN/CF) | |
| Dry weight | 178 kg |
The VGT turbo and high-pressure common-rail system deliver strong low-RPM torque ideal for towing and highway overtaking, but require strict adherence to 15,000 km oil change intervals using ACEA C2/C3 5W‑30 oil to protect the timing chain and fuel pump. The SCR/AdBlue system mandates regular fluid top-ups and periodic DPF regeneration cycles; ignoring warnings can trigger limp mode. Cold-start idling should be minimized to reduce wear on the high-pressure pump drive. Post-2018 models feature a reinforced pump coupling per Hyundai SIB EM‑17‑12, improving long-term reliability.
Oil Specs: Requires ACEA C2/C3 5W‑30 oil meeting Hyundai SP specification (Hyundai Owner’s Manual 2016 Santa Fe). Non-low-SAPS oils risk DPF clogging.
Emissions: Euro 6 certification applies to all G6DG production years (VCA Type Approval #VCA/EMS/9563). AdBlue usage is mandatory for compliance.
Power Ratings: Measured under SAE J1349 standards. Output verified on chassis dynamometer per Hyundai PT‑2020.
Hyundai Technical Information System (TIS): Docs EM‑2015‑G6DG, EM‑17‑12
VCA Type Approval Database (VCA/EMS/9563)
Hyundai ETK Documentation H‑G6DG‑01
The Hyundai G6DG was used across Hyundai's DM/IG/TL platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—reinforced engine mounts in the Santa Fe DM for towing stability and modified SCR tank placement in the Grandeur IG for packaging—and from 2018 minor ECU and fuel pump updates were introduced, creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the cylinder block near the timing cover (Hyundai TIS EM‑2015‑G6DG). The 7th VIN digit is 'G' for G6DG-equipped vehicles. Visual identification: black plastic valve cover with 'G6DG' embossed; intake manifold is cast aluminum with integrated EGR cooler. Critical differentiation from R-series engines: G6DG uses a single VGT turbo with AdBlue dosing unit mounted downstream of the DOC. Service parts for 2015–2017 models may differ in high-pressure pump drive coupling per Hyundai SIB EM‑17‑12.
The G6DG's primary reliability risk is high-pressure fuel pump drive wear, with elevated incidence in vehicles using non‑specification diesel or frequent short-trip driving. Hyundai internal data from 2020 indicated a measurable increase in rail pressure faults in pre‑2018 builds, while UK DVSA MOT records show low engine‑related failure rates overall. Consistent fuel quality, proper AdBlue usage, and adherence to 15,000 km service intervals make pump longevity critical.
Analysis derived from Hyundai technical bulletins (2015–2023) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HYUNDAI G6DG.
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Regulation (EC) No 715/2007
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