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 ap…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The G6DG is generally reliable with proper maintenance. Early models (2015–2017) had occasional high-pressure fuel pump drive wear, addressed in 2018 revisions. With correct ACEA C2/C3 5W‑30 oil, quality diesel, and regular AdBlue top-ups, many examples exceed 250,000 km without major repairs.
The main issues are high-pressure fuel pump drive wear, AdBlue system faults (crystallisation or sensor errors), and DPF regeneration failures due to short-trip driving. These are documented in Hyundai service bulletins EM‑17‑12 and TIS EM‑2015‑G6DG.
The G6DG powered the Santa Fe (DM, 2015–2023), Grandeur (IG, 2016–2022), and Tucson (TL, 2018–2023) in 2.2L CRDi variants. It was not used in Kia or other brands and is exclusive to Euro 6 diesel applications.
Yes. ECU remaps typically yield +20–30 kW safely on stock hardware due to robust internals and conservative factory calibration. However, tuning increases stress on the CP4.2 pump and may accelerate wear if fuel quality or oil changes are neglected. Supporting modifications (upgraded intercooler, exhaust) are recommended for stage 2+.
In a 2019 Santa Fe 2.2 CRDi, typical consumption is ~7.2 L/100km (city) and ~5.1 L/100km (highway), or about 47 mpg UK combined. Real-world mixed driving yields 42–50 mpg (UK), depending on load, terrain, and AdBlue system status.
Yes. The G6DG is an interference engine. If the timing chain fails (rare), piston-to-valve contact can cause catastrophic internal damage. However, the chain is designed as maintenance-free and typically lasts the engine’s lifetime with proper oil care.
Hyundai specifies 5W‑30 synthetic oil meeting ACEA C2/C3 and API SN/CF standards (Hyundai SP specification). Always use low-SAPS oil to protect the DPF and SCR systems; non-compliant oils can cause premature aftertreatment failure.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with HYUNDAI or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
HYUNDAI Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialHYUNDAI documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed”.
All external links open in new tabs. Please verify current availability of resources.