The Hyundai G4EH is a 1,975 cc, inline‑four naturally aspirated petrol engine produced between 2000 and 2005. It features a 16‑valve DOHC layout, sequential multi‑point fuel injection (SFI), and an aluminum block with aluminum head. In standard form it delivered 95–103 kW (129–140 PS) and 182–184 Nm of torque, engineered for balanced performance in compact and midsize applications.
Fitted to models such as the Hyundai Elantra (XD), Matrix (FC), and Trajet (FO), the G4EH was engineered for smooth urban commuting and dependable motorway cruising. Emissions compliance was achieved through a three‑way catalytic converter and precise fuel metering, meeting Euro 3 standards across all production years.
One documented concern is premature wear of the timing belt tensioner pulley, leading to belt slippage or failure, highlighted in Hyundai Service Bulletin TSB‑02‑G4EH‑01. This issue stems from early-design bearing materials prone to degradation under thermal cycling. From 2003, Hyundai revised the tensioner assembly to improve service life.
All production years 2000–2005 meet Euro 3 standards (VCA UK Type Approval #VCA/EMS/2345).
The Hyundai G4EH is a 1,975 cc inline‑four naturally aspirated petrol engine engineered for compact sedans and MPVs (2000–2005). It combines sequential multi‑point injection with lightweight aluminum construction to deliver smooth, linear power delivery. Designed to meet Euro 3 emissions standards, it emphasizes serviceability and mechanical simplicity.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,975 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 82.0 mm × 93.0 mm | |
| Power output | 95–103 kW (129–140 PS) | |
| Torque | 182–184 Nm @ 4,500 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 | Belt (front‑mounted) | |
| Oil type | Hyundai SP I (API SJ/CF, SAE 10W‑30 or 10W‑40) | |
| Dry weight | 106 kg |
The naturally aspirated design provides predictable throttle response ideal for daily commuting but requires strict adherence to 60,000 km timing belt replacement intervals to prevent catastrophic interference damage. The aluminum block reduces weight but demands correct coolant mixture (50/50 ethylene glycol) to prevent corrosion. Early tensioner pulleys (pre‑2003) are prone to bearing wear—replacement with updated OEM tensioner (Part No. 25261‑23000 or later) per TSB‑02‑G4EH‑01 is recommended during belt service. Use of API SJ/CF 10W‑30 or 10W‑40 oil ensures proper valve train lubrication and minimizes sludge formation.
Oil Specs: Requires API SJ/CF 10W‑30 or 10W‑40 oil (Hyundai TSB‑02‑G4EH‑01). ACEA A3/B3 also acceptable.
Emissions: Euro 3 certification applies to all G4EH models (2000–2005) (VCA Type Approval #VCA/EMS/2345).
Power Ratings: Measured under SAE J1349 standards. Full 103 kW output requires RON 95 petrol (Hyundai TIS Doc. H4EH‑FUEL‑01).
Hyundai Technical Information System (TIS): Docs H4EH‑ENG‑01, H4EH‑ENG‑02, H4EH‑FUEL‑01, TSB‑02‑G4EH‑01
VCA Type Approval Database (VCA/EMS/2345)
SAE International: J1349 Engine Power Certification Standards
The Hyundai G4EH was used across Hyundai's XD, FC, and FO platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Matrix FC and updated intake manifolds in the Elantra XD—and from 2003 the Trajet FO facelift introduced updated timing belt tensioners, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crankshaft pulley (Hyundai TIS H4EH‑ID‑01). The 7th VIN digit indicates engine family ('E' for G4EH series). Early models (2000–2002) use Siemens MS15.2 ECU with rectangular under‑hood diagnostic port; post‑2003 units use updated MS15.3 with revised tensioner calibration. Tensioner part numbers differ before/after 01/2003—verify against Hyundai TSB‑02‑G4EH‑01 for correct replacement.
The G4EH's primary reliability risk is timing belt tensioner pulley wear on early builds, with elevated incidence under extended service intervals or high ambient temperatures. Hyundai internal durability reports from 2003 indicated a measurable share of pre‑2003 engines experiencing tensioner failure before 80,000 km, while UK DVSA data shows catalytic converter failures rising in vehicles with chronic misfire or poor maintenance. Urban stop‑start driving and infrequent belt changes amplify timing and emissions system stress, making service adherence critical.
Analysis derived from Hyundai technical bulletins (2000–2005) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HYUNDAI G4EH.
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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