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 refinement. Emissions compliance is achieved through a sophisticated three-way catalytic converter system and particulate filter (GPF), meeting stringent Euro 6d standards across all markets.
One documented area for attention is the potential for premature wear of the high-pressure fuel pump cam follower, a known trait in some direct-injection turbo engines. Genesis Service Information Bulletin SI-G4NC-002 recommends inspection at 60,000 km intervals and replacement with the updated part if wear exceeds specification.
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 twin-scroll turbo provides strong, lag-free torque from low RPMs, ideal for confident overtaking. To mitigate potential high-pressure fuel pump cam follower wear, Genesis recommends inspection every 60,000 km per SIB SI-G4NC-002. The chain-driven timing system is designed for longevity but requires correct oil specification (5W-30 API SP) to ensure lubrication. Coolant should be replaced per the 10-year/160,000 km schedule outlined in the owner's manual.
Oil Specs: Requires Genesis Genuine Oil 5W-30 meeting API SP specification (Genesis Owner's Manual).
Emissions: Euro 6d certification applies to all model years (2020–Present) (VCA Type Approval #VCA/EMS/5679).
Power Ratings: Measured under SAE J1349 standards. Output figures are for standard tune (Genesis TIS Doc. G-I4-TT-01).
Genesis Technical Information System (TIS): Docs G-I4-TT-01, G-2497-I4
VCA Type Approval Database (VCA/EMS/5679)
SAE International: J1349 Engine Power Certification Standards
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.
Locate the engine code stamped on the front face of the cylinder block, near the alternator (Genesis TIS G-I4-ID-01). The 8th digit of the VIN is 'N' for the 2.5T variant. Visually, the engine is identifiable by its single turbocharger mounted at the front of the engine and the prominent '2.5 T-GDI' badge on the engine cover. Service parts are generally consistent across GV70 and G70 applications for this engine code.
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.
Find answers to most commonly asked questions about GENESIS G4NC.
Comprehensive technical documentation and regulatory references
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GENESIS Official Site
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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
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VCA Certification Portal
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