The Kia G4ED is a 1,599 cc, inline‑four naturally aspirated petrol engine produced between 2005 and 2011. It features a cast-iron block, aluminum head, dual overhead camshafts (DOHC), and 16 valves with Kia's CVVT system on the intake camshaft. This design prioritizes fuel efficiency and smooth, linear power delivery for urban and highway driving.
Fitted primarily to the second-generation Kia cee'd (ED) and second-generation Kia Sportage (JE), the G4ED was engineered for responsive, economical motoring in compact family vehicles. Emissions compliance was achieved through multi-point fuel injection and optimized combustion, meeting Euro 4 standards across its production run.
One documented concern involves potential failure of the CVVT oil control solenoid, which can trigger check engine lights and cause rough idling or hesitation. This issue, referenced in Kia Technical Service Bulletin TSB-08-EN-003, is often linked to oil sludge buildup from infrequent oil changes.
Kia
Production years 2005–2011 meet Euro 4 standards across all applicable markets (VCA UK Type Approval #VCA/KIA/G4ED/2005).
The Kia G4ED is a 1,599 cc inline‑four naturally aspirated petrol engine engineered for compact hatchbacks and SUVs (2005-2011). It combines CVVT variable valve timing with multi-point fuel injection to deliver smooth, linear power and enhanced fuel economy. Designed to meet Euro 4 standards, it balances responsive performance with low running costs.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,599 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 78.8 mm × 82.0 mm | |
| Power output | 85 kW (115 PS) @ 6,000 rpm | |
| Torque | 154 Nm @ 4,500 rpm | |
| Fuel system | Multi-point fuel injection (MPFI) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | Kia Genuine 5W‑30 (API SM/ILSAC GF-4) | |
| Dry weight | 110 kg |
The CVVT system provides a broad torque curve ideal for city driving but requires strict adherence to 15,000 km or 12-month oil change intervals to prevent solenoid clogging. Kia Genuine 5W-30 oil is critical for maintaining hydraulic actuator function and chain tensioner health. Extended oil change intervals can accelerate sludge formation, leading to solenoid failure and rough running. The chain-driven timing system is generally robust but relies on consistent oil pressure and quality.
Oil Specs: Requires Kia Genuine 5W-30 meeting API SM/ILSAC GF-4 (Kia Owner's Manual). ACEA A3/B4 specification is also acceptable.
Emissions: Euro 4 certification applies universally to all 2005-2011 G4ED engines (VCA Type Approval #VCA/KIA/G4ED/2005).
Power Ratings: Measured under SAE J1349 standards. Output figures are consistent across all markets (Kia TIS Doc. KMS-G4ED-03).
Kia Technical Information System (TIS): Docs KMS-G4ED-01, KMS-G4ED-02, KMS-G4ED-03, TSB-08-EN-003
VCA Type Approval Database (VCA/KIA/G4ED/2005)
SAE International: J1349 Engine Power Certification Standards
The Kia G4ED was used across Kia's ED and JE platforms with transverse mounting. This engine received platform-specific adaptations-minor ECU calibrations for the Sportage's slightly higher curb weight-and no significant facelift revisions occurred during its production run, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a metal plate affixed to the cylinder head cover near the ignition coils (Kia TIS KMS-G4ED-ID). The 8th digit of the VIN is 'E' for vehicles equipped with the G4ED engine. Visually, the engine is identifiable by its black plastic intake manifold and 'CVVT' badge on the cover. Critical differentiation from the 1.6 Gamma (G4FC): The G4ED is an older design with a different cylinder head casting and intake manifold. Service parts for the G4ED are generally interchangeable across cee'd and Sportage models from 2005-2011, but ECU software versions may differ (Kia TIS Doc. KMS-G4ED-SW).
The G4ED's primary long-term consideration is CVVT solenoid failure, often linked to extended oil change intervals. Kia's internal service data indicates it is the most frequent cause of drivability complaints and check engine light activations for this engine. Vehicles subjected to predominantly short, cold journeys are most susceptible, making adherence to service schedules critical.
Analysis derived from Kia technical bulletins (2005-2011) and UK DVSA failure statistics (2014-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about KIA G4ED.
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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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