The Hyundai G6DA is a 2,656 cc, V6 naturally aspirated petrol engine produced between 2005 and 2010. It features a dual overhead camshaft (DOHC) 24‑valve layout with sequential multi‑point fuel injection (SFI), delivering 125–132 kW (170–180 PS) and 247–255 Nm of torque. Its compact 60° V6 cast‑iron block and aluminium heads provide smooth power delivery and inherent balance for refined operation.
Fitted to models such as the Grandeur (TG), Sonata (NF), and Azera (MG), the G6DA was engineered for quiet, linear performance in midsize and executive 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 timing chain tensioner rails, which can lead to chain rattle and potential misalignment. This issue, referenced in Hyundai Technical Service Bulletin TSB‑06‑EM‑021, stems from early‑design polymer guides susceptible to thermal degradation under sustained load. From late 2007, Hyundai revised the guide material and updated tensioner geometry to improve durability.
Hyundai
All production years (2005–2010) meet Euro 4 emissions standards (VCA UK Type Approval #VCA/EMS/8456).
The Hyundai G6DA is a 2,656 cc V6 naturally aspirated petrol engine engineered for midsize and executive sedans (2005–2010). It combines DOHC architecture with sequential multi‑point fuel injection to deliver smooth, vibration‑free power and consistent torque. Designed to meet Euro 4 emissions standards, it balances refinement with serviceability and long‑term reliability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,656 cc | |
| Fuel type | Petrol (Unleaded) | |
| Configuration | V6, DOHC, 24‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 86.7 mm × 75.0 mm | |
| Power output | 125–132 kW (170–180 PS) @ 6,000 rpm | |
| Torque | 247–255 Nm @ 4,500 rpm | |
| Fuel system | Sequential multi‑point injection (SFI) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 10.4:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain (with polymer guide rails) | |
| Oil type | Hyundai SP 10W‑40 (API SL/CF) | |
| Dry weight | 178 kg |
The G6DA delivers smooth, refined power ideal for highway cruising and executive driving but requires strict adherence to 10,000 km oil change intervals using Hyundai SP 10W‑40 to prevent premature wear of timing chain guides—especially in pre-late‑2007 units. Extended oil life or high ambient temperatures accelerate polymer rail degradation, potentially causing chain rattle or misalignment. Use only EN 228-compliant unleaded petrol to protect the catalytic converter. Post-late‑2007 engines feature updated guide rails per TSB‑06‑EM‑021; earlier units benefit from proactive inspection and tensioner upgrades.
Oil Specs: Requires Hyundai SP 10W‑40 (API SL/CF) specification (Hyundai TSB‑06‑EM‑021). ACEA A3/B3 oils acceptable if Hyundai‑approved.
Emissions: Euro 4 certification applies to all 2005–2010 models (VCA Type Approval #VCA/EMS/8456). No market variations.
Power Ratings: Measured under SAE J1349 standards. Power output verified on chassis dynamometer per Hyundai PT‑2007.
Hyundai Technical Information System (TIS): Docs EM‑G6DA‑2005, H‑ENG‑G6DA‑01
Hyundai Technical Service Bulletin TSB‑06‑EM‑021
VCA Type Approval Database (VCA/EMS/8456)
SAE International: J1349 Engine Power Certification Standards
The Hyundai G6DA was used across Hyundai's TG, NF, and MG platforms with longitudinal mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Grandeur TG, updated intake manifolds in the Sonata NF, and ECU calibration refinements in the Azera MG—creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the left cylinder bank near the timing cover (Hyundai TIS EM‑G6DA‑2005). The 7th VIN digit is 'D' for G6DA-equipped vehicles. Pre-late-2007 engines have silver cam covers with black intake manifolds; post-late-2007 units use black cam covers. Critical differentiation from G6DB: G6DA has a single exhaust manifold per bank, while G6DB uses a dual-runner design. ECU part numbers for G6DA begin with '96510‑5Bxxx'. Service parts for timing guides require production date verification—pre-10/2007 units need upgraded rails per TSB‑06‑EM‑021.
The G6DA's primary reliability risk is timing chain guide rail wear on early builds, with elevated incidence in sustained highway or hot-climate use. Hyundai internal field data from 2008 indicated a measurable rate of chain noise complaints before 120,000 km in pre‑late‑2007 units, while UK DVSA records show no significant emissions‑related MOT failures linked to this engine. High oil temperature and extended drain intervals accelerate polymer degradation, making oil quality and interval adherence critical.
Analysis derived from Hyundai technical bulletins (2006–2010) and UK DVSA failure statistics (2010–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HYUNDAI G6DA.
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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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