The 3.3-liter gasoline V6 engine Hyundai G6DB was produced by the company from 2004 to 2011 and was installed on both front-wheel drive models such as the Santa Fe and the rear-wheel drive Sorento. There were two generations of such a power unit with quite significant differences.

In 2004, the 3.3-liter V6 unit of the Lambda I series debuted on the fifth generation of the Sonata. This is a typical V-engine with an aluminum block and a 60° cylinder angle, multipoint fuel injection, a pair of DOHC cylinder heads without hydraulic lifters, a timing chain and an aluminum intake manifold with two-stage VIS geometry change system. The first generation of the engine was equipped with CVVT phase shifters only on the intake camshafts.

In 2008, the second generation of V6 or Lambda II engines appeared on the restyled Sonata. These power units were distinguished by the presence of CVVT phase regulators already on all camshafts, as well as a plastic intake manifold with a three-stage geometry change system.

Lambda 3.3L family: G6DB, G6DF, G6DH, G6DM, G6DP.

The engine was installed on:

• Hyundai Grandeur 4 (TG) in 2005 – 2011;
• Hyundai Santa Fe 2 (CM) in 2005 – 2009;
• Hyundai Sonata 5 (NF) in 2004 – 2010;
• Kia Opirus 1 (GH) in 2006 – 2011;
• Kia Sorento 1 (BL) in 2006 – 2009.