The Kia G4LA – Petrol is a 2,359 cc, inline‑four naturally aspirated engine produced between 2015 and 2020. It features dual overhead camshafts (DOHC), multi-point fuel injection, and Kia’s Dual CVVT system for intake and exhaust camshafts. This configuration delivers 136 kW (185 PS) and 241 Nm of torque, prioritizing smooth, linear power delivery for confident highway cruising and urban versatility.
Fitted to models like the Optima and Sorento, the G4LA – Petrol was engineered for refined, responsive performance with low NVH characteristics. Emissions compliance for its production period was met through precise fuel metering and catalytic conversion, aligning with Euro 6 standards for its primary European markets.
One documented service concern involves the variable valve timing (VVT) oil control valves, which can become clogged with sludge, leading to reduced performance or activation of the malfunction indicator lamp. This issue is addressed in Kia Service Bulletin TSB-16-03-001, recommending inspection and cleaning or replacement as necessary.
Production years 2015–2020 meet Euro 6 standards for applicable markets (VCA UK Type Approval #VCA/EMS/5685).
The Kia G4LA – Petrol is a 2,359 cc inline‑four naturally aspirated engine engineered for mid-size sedans and SUVs (2015-2020). It combines DOHC architecture with Dual CVVT on both intake and exhaust camshafts to deliver smooth, linear power and good fuel efficiency. Designed to meet Euro 6 standards, it offers a refined balance of performance and low running costs for daily commuting and longer journeys.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,359 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 88.0 mm × 97.0 mm | |
| Power output | 136 kW (185 PS) @ 6,000 rpm | |
| Torque | 241 Nm @ 4,000 rpm | |
| Fuel system | Multi-point fuel injection | |
| Emissions standard | Euro 6 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | API SN/SM, ACEA A5/B5, SAE 5W-20 | |
| Dry weight | Not Available |
The naturally aspirated design offers predictable, linear power ideal for relaxed highway cruising and city driving. Regular oil changes with the specified 5W-20 grade are crucial for maintaining the chain-driven timing system and Dual CVVT solenoid function. The engine is generally robust, but neglecting oil changes can lead to sludge buildup, potentially affecting the VVT system as noted in TSB-16-03-001. Using high-quality fuel helps maintain injector and sensor performance. The recommended oil viscosity is optimized for fuel economy in varied European climates.
Oil Specs: Requires API SN/SM or ACEA A5/B5 specification oil (Kia Owner's Manual OM-G4LA-2015). Viscosity 5W-20 is recommended for optimal fuel economy and cold-start performance.
Emissions: Euro 6 certification applies to all 2015–2020 G4LA Petrol models for applicable markets (VCA Type Approval #VCA/EMS/5685).
Power Ratings: Measured under SAE J1349 standards (Kia Group PT-2018). Output is consistent across specified model applications.
Kia Technical Information System: Workshop Manual WM-G4LA-01
Kia Parts Catalogue (ETK): Doc. KIA-ETK-G4LA-2015
VCA Type Approval Database (VCA/EMS/5685)
The Kia G4LA – Petrol was used across Kia's TF/MQ platforms with transverse mounting. This engine received platform-specific adaptations-such as revised engine mounts for the Sorento-creating minor interchange considerations. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the cylinder block, near the gearbox flange. The 8th digit of the VIN typically corresponds to the engine type for Kia vehicles of this era. Visually, the engine features a black plastic intake manifold and a prominent 'G4LA' or '2.4' badge on the cam cover. Differentiate from turbocharged variants by the absence of a turbocharger and associated piping. Service parts are generally consistent across Optima and Sorento applications for this engine code, but always verify part numbers using the VIN.
The G4LA – Petrol's primary documented service concern is VVT oil control valve clogging, often linked to extended oil change intervals or use of incorrect oil viscosity. While generally robust, UK DVSA data shows a minor correlation between neglected maintenance and emissions-related faults. Consistent use of correct 5W-20 oil specification and timely changes are critical for long-term reliability.
Analysis derived from Kia technical bulletins (2015-2020) and UK DVSA failure statistics (2018-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about KIA G4LA.
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