The Hyundai G6BA is a 2,656 cc, V6 naturally aspirated petrol engine produced between 2005 and 2010. It features dual overhead camshafts (DOHC), 24 valves, and continuous variable valve timing (CVVT) on the intake camshafts. In standard form it delivered 125–132 kW (170–180 PS) and torque figures between 247–255 Nm, providing smooth power delivery and refined cruising characteristics.
Fitted to models such as the Grandeur (TG), Sonata (NF), and Azera (MG), the G6BA was…
Hyundai
All production years 2005–2010 meet Euro 4 standards .
The Hyundai G6BA is a 2,656 cc V6 naturally aspirated petrol engine engineered for mid-size and executive sedans (2005–2010). It combines DOHC architecture with intake-side CVVT to deliver smooth, linear power and quiet operation. Designed to meet Euro 4 emissions standards, it balances drivability with highway refinement and regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,656 cc | |
Fuel type | Petrol (Unleaded, RON 95 min) | |
Configuration | V6, DOHC, 24‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 86.7 mm × 75.0 mm | |
Power output | 125–132 kW (170–180 PS) | |
Torque | 247–255 Nm @ 4,000 rpm | |
Fuel system | Sequential multi-point fuel injection (SFI) | |
Emissions standard | Euro 4 | |
Compression ratio | 10.4:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven DOHC | |
Oil type | Hyundai SP 5W‑30 (API SM/ILSAC GF-4) | |
Dry weight | 178 kg |
The Hyundai G6BA was used across Hyundai's NF/TG platforms with longitudinal mounting and no hybrid variants. This engine received platform-specific intake manifolds—acoustic tuning in the Grandeur, revised coolant routing in the Azera, and optimized airflow in the Sonata—and from 2008 the oil pan baffle revision improved oil control, creating service part distinctions. All adaptations are documented in OEM technical bulletins.
Engine Finders UK Ltd, which operates EngineCode.uk, can pass your enquiry to engine suppliers in the UK. The service is for vehicles in the United Kingdom, with UK delivery or fitting. This is a commercially connected service, and sending an enquiry does not confirm diagnosis or compatibility.
Diagnostic reminder: If a technician has recommended replacing the engine, you can send an enquiry to engine suppliers in the UK. Confirm the diagnosis first: an engine-code record does not diagnose a fault.
Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The G6BA is generally smooth and refined, but early models (2005–2007) are prone to oil sludge if maintenance is neglected. Post-2008 revisions and strict adherence to 7,500–10,000 km oil changes with correct 5W‑30 SP spec oil greatly improve longevity. Well-maintained examples can exceed 250,000 km without major issues.
Top issues include oil sludge buildup (pre-2008), CVVT solenoid clogging, intake manifold runner control (IMRC) failure, and water pump leaks. These are documented in Hyundai TSBs and addressed with updated service parts. Most problems are preventable with proper oil changes and correct fluid specifications.
The G6BA powered the Sonata (NF, 2005–2010), Grandeur (TG, 2005–2010), and Azera (MG, 2006–2010). All are non-hybrid, Euro 4 compliant, and use longitudinal mounting with V6 DOHC and intake-side CVVT.
Limited tuning potential. As a naturally aspirated V6, gains are modest—typically +10–15 kW via ECU remap and intake/exhaust upgrades. No factory turbo variants exist, and internal components are not designed for significant forced induction.
In a Sonata 2.7 V6, expect ~11.5 L/100km city and ~7.2 L/100km highway (~25 mpg UK combined). Real-world figures vary with driving style, but the engine prioritizes smoothness over efficiency compared to modern turbocharged units.
Yes. The G6BA is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can cause catastrophic damage. Regular inspection of the chain tensioner and using correct oil viscosity are critical to prevent failure.
Hyundai specifies SP 5W‑30 synthetic oil meeting API SM/ILSAC GF-4 or newer. Always use oil with adequate detergents to prevent sludge. Change every 7,500–10,000 km, especially in hot climates or stop-start driving.
Comprehensive technical documentation and regulatory references
EngineCode.uk is operated by Engine Finders UK Ltd. It provides engine-reference information and an optional commercial enquiry service. It is not an official manufacturer website. Check the record's sources and confirm vehicle-specific details before relying on it for parts, repairs or replacement.
Our editorial standard prioritises relevant manufacturer documentation and official regulatory sources. The sources and verification status for a record should be checked alongside the data.
A statement is not verified merely because a source is listed. Where supporting evidence is missing or conflicting, the record should identify that limitation. Please report unsupported or inconsistent information.
Transparency in gaps
A missing or unverified value does not mean the manufacturer has withheld it. We distinguish information not yet verified, information not available to us, and information explicitly not disclosed by the source.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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)
UK type-approval authority for automotive products.
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
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
Records are subject to review and correction. Source links, dates and verification notes should be read with the technical information. Our Editorial and Sourcing Policy explains our standards and review process.
Found an error or missing source? Report a problem with this page. Include the field or statement concerned and a supporting source if available. You can also email corrections@enginecode.uk.
Copyright and permissions
Images and other material may be protected by copyright. Attribution does not by itself grant permission to reuse material. If you believe material on this site infringes your rights, contact copyrights@enginecode.uk with the page URL and details of your claim. We will review the material and take appropriate action.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
Our Privacy Policy explains how Engine Finders UK Ltd uses information from visits, vehicle lookups, enquiries and messages. Our Cookie Policy explains cookies and similar technologies and how to change your choices.
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
Ownership and commercial services
EngineCode.uk is owned and operated by Engine Finders UK Ltd. Alongside our reference content, we offer an optional replacement-engine enquiry service through Engine Finders and may identify relevant services provided by businesses connected with us. These commercial connections are disclosed. Using an enquiry service is not required to read our reference content.
Engine Finders UK Ltd operates this website. Our optional enquiry service has a commercial purpose. Our Ownership and Commercial Disclosure explains the relationship between the reference website and that service. Participating suppliers pay a fee or subscription to participate on the network and receive quote requests.
Use this record as a starting point for identification. Specifications and vehicle applications may contain errors or omissions. Confirm the exact engine variant and compatibility using vehicle-specific documentation and a qualified supplier or technician.
All external links open in new tabs. Please verify current availability of resources.