The Genesis G4NC is a 2,497 cc, inline‑four turbocharged petrol engine introduced in 2020 for the brand's mid — size luxury vehicles. It features gasoline direct injection, a single twin — scroll turbocharger, and an aluminum block/heads for reduced weight. Peak output is rated at 223 kW (304 PS), delivering 422 Nm of torque, enabling brisk, responsive acceleration.
Fitted to the GV70 SUV and G70 sedan, the G4NC was engineered for a balance of sporty performance and daily r…
Genesis
All production years (2020–Present) meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/5679).
The Genesis G4NC is a 2,497 cc inline‑four turbo petrol engineered for mid-size luxury SUVs and sedans (2020-Present). It combines direct injection with a twin-scroll turbocharger to deliver responsive, linear power and quiet operation. Designed to meet Euro 6d standards, it balances spirited performance with modern emissions control.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,497 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 88.5 mm × 101.5 mm | |
Power output | 223 kW (304 PS) @ 5,800 rpm | |
Torque | 422 Nm @ 1,450–4,000 rpm | |
Fuel system | Gasoline direct injection (GDi) | |
Emissions standard | Euro 6d | |
Compression ratio | 10.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single twin-scroll turbocharger (Mitsubishi Heavy Industries) | |
Timing system | Chain-driven | |
Oil type | Genesis Genuine Oil 5W-30 (API SP) | |
Dry weight | 165 kg |
The Genesis G4NC was developed for Genesis's GV70 and G70 platforms with longitudinal mounting. This engine features platform-specific calibrations for the GV70's SUV weight and the G70's sedan dynamics. All applications are documented in OEM technical bulletins.
The G4NC's primary documented service consideration is potential wear of the high-pressure fuel pump cam follower, a known issue in some GDi turbo engines. Genesis service bulletins provide a specific inspection and replacement protocol. Adhering to this schedule and using recommended fuel are key preventative measures.
Analysis derived from Genesis technical bulletins (2020-2024) and aggregated owner service data (2020-2024). 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 G4NC is a modern, well-engineered engine with no widespread critical failures reported. Its main long-term consideration is the potential for high-pressure fuel pump cam follower wear, which Genesis addresses with a specific inspection protocol. With adherence to Genesis's maintenance schedule and use of recommended fluids, it is expected to be very reliable.
The most frequently noted items are potential high-pressure fuel pump cam follower wear (addressed in SIB SI-G4NC-002), occasional minor oil consumption during break-in, and rare intake manifold runner control faults. These are generally service or maintenance items rather than inherent design flaws leading to breakdowns.
The G4NC 2.5-liter turbocharged inline-4 is used in the current generation Genesis G70 sports sedan and the GV70 compact luxury SUV, specifically in their '2.5T' trim levels. It is not used in any other Genesis or Hyundai/Kia models.
Yes, the G4NC has significant tuning potential. ECU remaps can safely increase output. The robust internals and turbo design can handle increased boost. However, tuning will void the factory warranty and may accelerate wear on components like the fuel pump, turbos, and transmission.
Official combined figures are approximately 9.8 L/100km (29 mpg UK) for the GV70 and 9.5 L/100km (30 mpg UK) for the G70. Real-world driving, especially in urban settings or with spirited use, will typically see figures in the 11-14 L/100km (20-26 mpg UK) range.
Yes. Like virtually all modern overhead cam engines, the G4NC is an interference design. A timing chain failure could result in severe engine damage. Fortunately, the chain is designed for the engine's lifetime under normal conditions and with proper oil maintenance.
Genesis specifies 5W-30 viscosity oil meeting the latest API SP (or ILSAC GF-6A) standard. Using Genesis Genuine Oil or a high-quality equivalent that meets this specification is crucial for engine protection, turbo longevity, and maintaining the timing chain.
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 GENESIS 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.
GENESIS 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 officialGENESIS 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.