[2] The upgrades include new two injectors per cylinder, increased compression ratio (improving the thermal efficiency), redesigned water jacket shape, piston cooling by oil jets, water-cooled EGR system and several other changes for fuel efficiency.

[4][5] Furthermore, a mild hybrid technology with 12 or 48-volt Integrated Starter Generator (ISG) dubbed as Smart Hybrid Vehicle by Suzuki (SHVS) is available for markets with stricter emission regulation, such as Europe, Japan, India, Singapore and Mexico (marketed as Boostergreen).

This mild hybrid technology helps to increase fuel mileage, providing optional acceleration and also reduces emissions.

[8] Technical specifications: Applications: The three-cylinder 1.0-litre version of K engine, fitted in many Suzuki's city cars since 2008.

This changes claimed to increase the petrol mileage over 23km/L, achieved maximum power on lower rev and reduced frictional losses.

Technical specifications: Applications: Reworked version of K10B engine with naturally aspirated Dualjet or turbocharged direct injection Boosterjet technology.

Mainly for the Indian market as the country imposed higher excise tax for petrol engines larger than 1,200 cc.

[15][16] Technical specifications: Applications: Dualjet version of K12M engine and also available with SHVS mild hybrid technology.

Technical specifications: Applications: Similar as K12B, this engine was also used by Suzuki's former joint venture partner in China.

[26] Technical specifications: Application: Dualjet version of K15B engine, it is available in Europe and Japan with 140V strong hybrid combined to a Motor Generator Unit (MGU).