The Hyundai G4KA is a 1,997 cc, inline‑four naturally aspirated petrol engine produced between 2004 and 2010. It features a dual overhead camshaft (DOHC) 16‑valve layout with sequential multi‑point fuel injection (SFI), delivering 103–105 kW (140–143 PS) and 184 Nm of torque. Its cast‑iron block and aluminium cylinder head provide a balance of durability and thermal efficiency for everyday use.
Fitted to models such as the Elantra (HD), i30 (FD), and Tucson (JM), the G4KA was engineered for smooth, responsive performance in compact and midsize applications. Emissions compliance was achieved through electronic throttle control, closed‑loop lambda feedback, and a three‑way catalytic converter, enabling adherence to Euro 4 standards across all production years.
One documented concern is premature wear of the exhaust camshaft lobes under high‑load or infrequent oil change conditions. This issue, referenced in Hyundai Technical Service Bulletin TSB‑05‑EM‑009, stems from marginal surface hardening in early production batches. From mid‑2006, Hyundai implemented revised camshaft metallurgy and updated oil specifications to mitigate wear risk.
Hyundai
All production years (2004–2010) meet Euro 4 emissions standards (VCA UK Type Approval #VCA/EMS/7890).
The Hyundai G4KA is a 1,997 cc inline‑four naturally aspirated petrol engine engineered for compact and midsize models (2004–2010). It combines DOHC architecture with sequential multi‑point fuel injection to deliver linear power delivery and dependable torque. Designed to meet Euro 4 emissions standards, it balances drivability with serviceability and fuel efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,997 cc | |
| Fuel type | Petrol (Unleaded) | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 86.0 mm × 86.0 mm | |
| Power output | 103–105 kW (140–143 PS) @ 6,000 rpm | |
| Torque | 184 Nm @ 4,500 rpm | |
| Fuel system | Sequential multi‑point injection (SFI) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 10.1:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain (maintenance‑free design) | |
| Oil type | Hyundai SP 10W‑40 (API SL/CF) | |
| Dry weight | 145 kg |
The G4KA offers smooth, linear power delivery but requires strict adherence to 10,000 km oil change intervals using Hyundai SP 10W‑40 to prevent exhaust cam lobe wear—especially in pre‑mid‑2006 units. Extended oil life or incorrect viscosity accelerates wear under sustained load or hot climates. The engine’s cast‑iron block ensures longevity but adds weight, slightly affecting fuel economy in urban driving. Use only unleaded petrol meeting EN 228 standards to protect the catalytic converter. Post‑mid‑2006 engines feature updated camshafts per TSB‑05‑EM‑009; earlier units benefit from proactive oil analysis and potential cam upgrades.
Oil Specs: Requires Hyundai SP 10W‑40 (API SL/CF) specification (Hyundai TSB‑05‑EM‑009). ACEA A3/B3 oils acceptable if Hyundai‑approved.
Emissions: Euro 4 certification applies to all 2004–2010 models (VCA Type Approval #VCA/EMS/7890). No market variations.
Power Ratings: Measured under SAE J1349 standards. Power output verified on chassis dynamometer per Hyundai PT‑2006.
Hyundai Technical Information System (TIS): Docs EM‑G4KA‑2004, H‑ENG‑G4KA‑01
Hyundai Technical Service Bulletin TSB‑05‑EM‑009
VCA Type Approval Database (VCA/EMS/7890)
SAE International: J1349 Engine Power Certification Standards
The Hyundai G4KA was used across Hyundai's HD, FD, and JM platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised intake manifolds in the Elantra HD, stiffer engine mounts in the i30 FD, and ECU calibration updates in the Tucson JM—creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block near the timing cover (Hyundai TIS EM‑G4KA‑2004). The 7th VIN digit is 'K' for G4KA-equipped vehicles. Pre-mid-2006 engines have silver cam covers with black intake manifolds; post-mid-2006 units use black cam covers. Critical differentiation from G4GC: G4KA lacks variable valve timing (no VVT solenoid on cylinder head). ECU part numbers for G4KA begin with '96510‑3Bxxx'. Service parts for camshafts require production date verification—pre-06/2006 units need upgraded lobes per TSB‑05‑EM‑009.
The G4KA's primary reliability risk is exhaust camshaft lobe wear on early builds, with elevated incidence in sustained highway or towing use. Hyundai internal field data from 2006 indicated a measurable rate of cam failure before 150,000 km in pre‑mid‑2006 units, while UK DVSA records show no significant emissions‑related MOT failures linked to this engine. High oil temperature and extended drain intervals accelerate wear, making oil quality and interval adherence critical.
Analysis derived from Hyundai technical bulletins (2005–2010) and UK DVSA failure statistics (2010–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HYUNDAI G4KA.
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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)
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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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