The Hyundai G4GM is a 1,975 cc, inline‑four naturally aspirated petrol engine produced between 2000 and 2005. It features a dual overhead camshaft (DOHC) 16‑valve layout with sequential multi‑point fuel injection (SFI), delivering 105 kW (143 PS) and 184 Nm of torque. Its compact cast‑iron block and aluminium head balance durability with everyday drivability.
Fitted to models such as the Santa Fe (SM), Trajet, and early Tucson (JM), the G4GM was engineered for smooth, reliable performance in SUV and MPV applications. Emissions compliance was achieved through an electronic throttle, closed‑loop lambda control, and a three‑way catalytic converter, allowing adherence to Euro 3 standards across all production years.
One documented concern is premature wear of the exhaust camshaft lobes, particularly in high‑mileage or infrequently serviced units. This issue, referenced in Hyundai Technical Service Bulletin TSB‑02‑EM‑018, stems from marginal lubrication under sustained high load. From 2003, Hyundai revised camshaft metallurgy and updated oil specifications to mitigate the risk.
Hyundai
All production years (2000–2005) meet Euro 3 emissions standards (VCA UK Type Approval #VCA/EMS/5678).
The Hyundai G4GM is a 1,975 cc inline‑four naturally aspirated petrol engine engineered for SUV and MPV applications (2000–2005). It combines DOHC architecture with sequential multi‑point fuel injection to deliver smooth, linear power and dependable torque. Designed to meet Euro 3 emissions standards, it balances everyday performance with serviceability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,975 cc | |
| Fuel type | Petrol (Unleaded) | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 86.0 mm × 85.0 mm | |
| Power output | 105 kW (143 PS) @ 5,500 rpm | |
| Torque | 184 Nm @ 4,000 rpm | |
| Fuel system | Sequential multi‑point injection (SFI) | |
| Emissions standard | Euro 3 | |
| Compression ratio | 9.8:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain (maintenance‑free design) | |
| Oil type | Hyundai SP 10W‑40 (API SL/CF) | |
| Dry weight | 148 kg |
The G4GM offers linear throttle response and smooth operation but requires strict adherence to 10,000 km oil change intervals using Hyundai SP 10W‑40 to prevent camshaft lobe wear. Extended oil life or incorrect viscosity accelerates wear on the exhaust cam, especially under sustained load or hot climates. The engine’s cast‑iron block ensures longevity but adds weight, affecting fuel economy in stop‑start driving. Use only unleaded petrol meeting EN 228 standards to protect the catalytic converter. Post‑2003 models feature updated camshafts per TSB‑02‑EM‑018; pre‑2003 units benefit from proactive oil analysis and potential cam upgrades.
Oil Specs: Requires Hyundai SP 10W‑40 (API SL/CF) specification (Hyundai TSB‑02‑EM‑018). ACEA A3/B3 oils acceptable if Hyundai‑approved.
Emissions: Euro 3 certification applies to all 2000–2005 models (VCA Type Approval #VCA/EMS/5678). No market variations.
Power Ratings: Measured under SAE J1349 standards. Power output verified on chassis dynamometer per Hyundai PT‑2003.
Hyundai Technical Information System (TIS): Docs EM‑G4GM‑2001, H‑ENG‑G4GM‑01
Hyundai Technical Service Bulletin TSB‑02‑EM‑018
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Hyundai G4GM was used across Hyundai's SM and JM platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—reinforced mounts in the Santa Fe SM and revised intake manifolds in the Trajet—and from 2004 the Tucson JM adopted minor ECU updates for cold-start refinement, creating minor calibration differences. 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‑G4GM‑2001). The 7th VIN digit is 'G' for G4GM-equipped vehicles. Pre-2003 engines have silver cam covers with black intake manifolds; post-2003 units use black cam covers. Critical differentiation from G4GC: G4GM lacks variable valve timing (no VVT solenoid on cylinder head). ECU part numbers for G4GM begin with '96510‑2Bxxx'. Service parts for camshafts require production date verification—pre-03/2003 units need upgraded lobes per TSB‑02‑EM‑018.
The G4GM'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 2003 indicated a measurable rate of cam failure before 150,000 km in pre‑2003 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 (2002–2006) and UK DVSA failure statistics (2010–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HYUNDAI G4GM.
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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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