The Hyundai G4HD is a 1,591 cc, inline‑four naturally aspirated petrol engine produced between 2010 and 2018. It features dual overhead camshafts (DOHC), 16 valves, and continuous variable valve timing (CVVT) on the intake camshaft. In standard form it delivered 91–97 kW (124–132 PS) and torque figures between 154–161 Nm, optimized for urban efficiency and smooth low‑rpm response.
Fitted to models such as the i30 (GD), Elantra (MD), and Veloster (JS), the G4HD was engin…
Hyundai
All production years 2010–2018 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/6789).
The Hyundai G4HD is a 1,591 cc inline‑four naturally aspirated petrol engine engineered for compact hatchbacks and sedans (2010–2018). It combines DOHC architecture with intake-side CVVT to deliver responsive low-end torque and quiet operation. Designed to meet Euro 5 emissions standards, it balances drivability with urban fuel efficiency.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,591 cc | |
Fuel type | Petrol (Unleaded, RON 95 min) | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 77.0 mm × 85.4 mm | |
Power output | 91–97 kW (124–132 PS) | |
Torque | 154–161 Nm @ 4,850 rpm | |
Fuel system | Multi-point fuel injection (MPFI) | |
Emissions standard | Euro 5 | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven DOHC | |
Oil type | Hyundai SP 5W‑20 or 5W‑30 (API SN/ILSAC GF-5) | |
Dry weight | 118 kg |
The Hyundai G4HD was used across Hyundai's GD/MD platforms with transverse mounting and no hybrid variants. This engine received platform-specific intake manifolds—shorter runners in the Veloster for throttle response and acoustic tuning in the i30—and from 2015 the CVVT actuator revision improved reliability, creating service part distinctions. All adaptations are documented in OEM technical bulletins.
The G4HD's primary reliability risk is CVVT actuator malfunction in pre-2015 builds, with elevated incidence in high-mileage or stop-start urban use. Hyundai internal service data from 2014 indicated a measurable subset of early engines exhibiting DTCs P0011/P0014 due to solenoid sticking, while UK DVSA records show no significant emissions-related MOT failures tied to this engine. Extended oil change intervals and use of non-specified oil amplify contamination risk, making oil quality and interval adherence critical.
Analysis derived from Hyundai technical bulletins (2011–2016) 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 G4HD is generally dependable for daily driving, but early models (2010–2014) had CVVT actuator issues due to solenoid contamination. Post-2015 revisions resolved this. Regular oil changes with correct 5W‑20/30 SP spec oil are essential for longevity, especially in urban stop-start conditions.
Top issues include CVVT actuator sticking (pre-2015), timing chain tensioner wear, EGR valve coking, and valve cover oil leaks. These are documented in Hyundai TSBs and addressed with updated service parts. Most problems are preventable with proper maintenance and correct oil.
The G4HD powered the i30 (GD, 2011–2016), Elantra (MD, 2010–2015), and Veloster (JS, 2011–2018). All are non-hybrid, Euro 5 compliant, and use transverse mounting with DOHC and single CVVT on the intake camshaft.
Limited tuning potential. As a naturally aspirated 1.6L engine, gains are modest—typically +5–8 kW via ECU remap and intake/exhaust upgrades. No factory turbo variants exist, and internal components are not designed for significant forced induction.
In an i30 1.6 MPi, expect ~7.8 L/100km city and ~5.2 L/100km highway (~43 mpg UK combined). Real-world figures vary with driving style, but the engine is optimized for urban efficiency and smooth cruising.
Yes. The G4HD is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can cause catastrophic damage. Regular inspection of the chain tensioner and using correct oil viscosity are critical to prevent failure.
Hyundai specifies SP 5W‑20 or 5W‑30 synthetic oil meeting API SN/ILSAC GF-5 or newer. Always use low-SAPS oil to protect emissions components and valve train. Change every 10,000 km or 12 months.
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.