The Suzuki K engine family is a series of automobile engines from Suzuki, introduced in 1994. Displacements range from 0.7 L to 1.5 L. All engines have aluminium cylinder blocks with three or four cylinders in-line. Cylinder heads have two overhead camshafts, driven by chain, and four valves per cylinder. Fuel is gasoline/petrol, metered by multipoint fuel injection or direct injection. Some variants are turbocharged.

Since 2013, some of the K engines range have been upgraded with Dualjet technology. 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. The turbocharged variant with direct injection fuel system is called Boosterjet.

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. A strong hybrid variant with Motor Generator Unit (MGU) is available in Europe and Japan.

Three-cylinder K6A

This is the first K engine, which first appeared in 1994 and was discontinued in 2018. It is the smallest in the family and also the first K engine with VVT. This engine was available in several versions, such as naturally aspirated, turbocharged, lean-burn, CNG and strong hybrid. The hybrid version was also the first hybrid engine in the kei car class and only available in the Suzuki Twin.

Technical specifications: Displacement: Bore and stroke: 68 mm x 60.4 mm Valvetrain: DOHC, 12-valve, with or without VVT Compression ratio: 8.4–8.9 (turbo), 10.5 (NA) Maximum power: at 5500–6500 rpm (NA) at 6000–6500rpm (turbo) at 6500 rpm (CNG) Maximum torque: at 3500–4000 rpm (NA) at 3000–3500rpm (turbo) at 3500 rpm (CNG)

Applications: Naturally aspirated 1997–2012 Suzuki Wagon R/Mazda AZ-Wagon 1998–2008 Suzuki Kei 1998–2014 Suzuki Alto 1998–2014 Mazda Carol 1999–2006 Mazda Laputa 2001–2011 Suzuki MR Wagon/Nissan Moco 2001–2013 Suzuki Carry/Every 2001–2013 Mazda Scrum Truck 2002–2008 Mazda Spiano 2002–2015 Suzuki Alto Lapin 2003–2005 Suzuki Twin 2004–2009 Arctic Cat T660 2006–2009 Suzuki Cervo 2008–2013 Suzuki Palette 2009–2013 Nissan Roox 2010–2010 Nissan Pino 2012–2013 Mazda Flair Wagon

Turbocharged 1994–1998 Suzuki Alto 1995–1998 Suzuki Cappuccino 1995–2018 Suzuki Jimny 1997–2012 Suzuki Wagon R/Mazda AZ-Wagon 1998–2008 Suzuki Kei 1998–2008 Mazda AZ-Offroad 1999–2006 Mazda Laputa 2001–2011 Suzuki MR Wagon/Nissan Moco 2001–2013 Suzuki Every/Mazda Scrum Van 2002–2008 Mazda Spiano 2002–2015 Suzuki Alto Lapin 2004–2009 Arctic Cat T660 Turbo (110 hp) 2006–2009 Suzuki Cervo 2008–2013 Suzuki Palette 2009–2013 Nissan Roox 2012–2013 Mazda Flair Wagon 2013–2017 Caterham 7 160/165 (80 hp)

K10B

The three-cylinder 1.0-litre version of K engine, fitted in many Suzuki's city cars since 2008. In 2014, this engine was reworked by increasing the compression ratio from 10.0 to 11.0:1 and known as K-Next. This changes claimed to increase the petrol mileage over 23km/L, achieved maximum power on lower rev and reduced frictional losses. CNG variant also available for Indian domestic market.

Technical specifications: Displacement: Bore and stroke: 73 mm x 79.4 mm Valvetrain: DOHC, 12-valve Compression ratio: 10.0–11.0 Maximum power: at 6000 rpm at 6000 rpm (CNG) Maximum torque: at 3500 rpm at 3500 rpm (CNG)

Applications: 2008–2021 Suzuki Celerio 2008–2014 Suzuki Splash 2008–2014 Opel/Vauxhall Agila ecoFLEX 2008–2014 Suzuki Alto/A-Star/Nissan Pixo 2009–2014 Maruti Suzuki Estilo/Karimun Estilo (India/Indonesia) 2010–2025 Suzuki Wagon R (India/Pakistan/Sri Lanka) 2010–2022 Suzuki Alto K10 2013–2021 Suzuki Karimun Wagon R (Indonesia) 2017–present Suzuki Cultus (Pakistan) 2019–2022 Suzuki S-Presso

K10C

Reworked version of K10B engine with naturally aspirated Dualjet or turbocharged direct injection Boosterjet technology. The compression ratio was increased from 11.0:1 to 12.0:1 for more thermal efficiency and reduced frictional losses. Suzuki's SHVS mild hybrid system is available for this engine in European and Japanese market. The CNG version is also available for Indian market.

Technical specifications: Displacement: Bore and stroke: 73 mm x 79.4 mm Valvetrain: DOHC, 12-valve, Single or Dual VVT Compression ratio: 10.0 (turbo), 12.0 (NA) Maximum power: at 5500–6000 rpm (NA) at 5300 rpm (CNG) at 1000 rpm (electric motor) at 5500 rpm (turbo) Maximum torque: at 3500 rpm (NA) at 3400 rpm (CNG) at 1500–4500 rpm (turbo) at 100 rpm (electric motor)

Applications: Naturally aspirated 2015–present Suzuki Celerio 2022–present (Maruti) Suzuki Wagon R 2022–present (Maruti) Suzuki Alto K10 2022–present Suzuki S-Presso 2023–present Toyota Vitz (Africa)

Turbocharged 2015–2022 Suzuki Baleno 2016–2021 Suzuki SX4 S-Cross (Europe) 2017–2024 Suzuki Swift 2017–2025 Suzuki Xbee 2018–2021 Suzuki Vitara (Europe) 2023–present Suzuki Fronx (India/Bangladesh/Sri Lanka) 2024–present Toyota Urban Cruiser Taisor 2026–present Suzuki Brezza

Four-cylinder K10A The smallest four-cylinder K-series engine.

Technical specifications: Displacement: Bore and stroke: 68 mm x 68.6 mm Valvetrain: DOHC, 16-valve, with or without VVT Compression ratio: 8.4 (turbo), 10.0 (NA) Maximum power: at 6500–7000 rpm (NA) at 6500 rpm (turbo) Maximum torque: at 3500 rpm (NA) at 4000 rpm (turbo)

Applications: Naturally aspirated 1997–2002 Suzuki Wagon R+ 1999–2001 Chevrolet Wagon R+ (Colombia/Ecuador) 1999–2003 Chevrolet Alto (Colombia/Ecuador) 2000–2002 Chevrolet MW (Japan)

Turbocharged 1997–2000 Suzuki Wagon R+ (Japan) 2000–2002 Chevrolet MW (Japan)

K12A Technical specifications: Displacement: Bore and stroke: 71 mm x 74 mm Valvetrain: DOHC, 16-valve Compression ratio: 9.3 Maximum power: at 6000 rpm Maximum torque: at 3250 rpm

Applications: 1998–2000 Suzuki Wagon R+ (Europe)

K12B Appeared first in 2008 and reworked with Dualjet technology in 2013. In China, this engine was also used by Suzuki's former joint venture partners, Changan Suzuki and its subsidiaries. Known under E-Power EA12 or JL473Q names.

Technical specifications: Displacement: Bore and stroke: 73 mm x 74.2 mm Valvetrain: DOHC, 16-valve, VVT Compression ratio: 11.0–12.0 Maximum power: at 5500–6000 rpm Maximum torque: at 4400–4800 rpm

Applications: 2008–2014 Suzuki Splash 2008–2014 Opel/Vauxhall Agila 2020–2012 Suzuki Landy (China) 2010–2017 Suzuki Swift 2011–2015 Suzuki Solio/Mitsubishi Delica D:2 2012–2021 Changan/Changhe/Chana Star series 2013–2016 Changan CX20 2014–2024 Suzuki Ciaz (Thailand) 2014–2015 Chana Taurustar 2019–present Esemka Bima 1.2

K12C The Dualjet version of K12B engine and can also combined with 12-volt SHVS mild hybrid technology or a strong hybrid system with Motor Generator Unit (MGU).

Technical specifications: Displacement: Bore and stroke: 73 mm x 74.2 mm Valvetrain: DOHC, 16-valve, Dual VVT Compression ratio: 12.5 Maximum power: at 6000 rpm at 1000 rpm (mild hybrid electric motor) at 3185–8000 rpm (strong hybrid electric motor) Maximum torque: at 4400 rpm at 100 rpm (mild hybrid electric motor) at 1000–3185 rpm (strong hybrid electric motor)

Applications: 2015–2025 Suzuki Solio/Mitsubishi Delica D:2 2017–2024 Suzuki Swift 2015–2025 Suzuki Ignis 2015–2020 Suzuki Baleno (Europe and Japan)

K12D Replacing the previous K12C Dualjet engine for European (and several other markets), as the European emission standard has moved to Euro 6d stage. The displacement is the same as K12M and K12N Dualjet engines. The SHVS mild hybrid system is also standard.

Technical specifications: Displacement: Bore and stroke: 73 mm x 71.5 mm Valvetrain: DOHC, 16-valve, Dual VVT Compression ratio: 13.0 Maximum power: at 6000 rpm at 800 rpm (electric motor) Maximum torque: at 2000 rpm at 499 rpm (electric motor)

Applications: 2020–2024 Suzuki Swift Hybrid (Europe) 2020–2025 Suzuki Ignis Hybrid (Europe)

K12M

Destroked version of the K12B, developed by Maruti Suzuki. Mainly for the Indian market as the country imposed higher excise tax for petrol engines larger than 1,200 cc. This engine is also available for markets in South East Asia, South America and Africa; in 2020 the K12D derivative was developed from this.

VVT technology was added for this engine in 2012. In February 2018, the Dualjet version was introduced first in Thailand with higher 11.5:1 compression ratio.

Technical specifications: Displacement: Bore and stroke: 73 mm x 71.5 mm Valvetrain: DOHC, 16-valve, with or without VVT Compression ratio: 10.5–11.5 Maximum power: at 6000 rpm at 6000 rpm (CNG) Maximum torque: at 4000–4400 rpm at 4000 rpm (CNG)

Applications: 2009–2016 Suzuki Splash/Maruti Ritz 2010–present Suzuki Swift 2010–2025 Suzuki Dzire/Swift sedan 2015–2022 Suzuki Baleno (India/Sri Lanka) 2017–present Suzuki Ignis 2019–2022 Suzuki Wagon R (India) 2019–2022 Toyota Glanza (India)

K12N Dualjet version of K12M engine and also available with SHVS mild hybrid technology. A version for commercial vehicles with lower output is also available.

Technical specifications: Displacement: Bore and stroke: 73 mm x 71.5 mm Valvetrain: DOHC, 16-valve, Dual VVT Compression ratio: 12.0 Maximum power: at 6000 rpm at 6000 rpm (commercial vehicle) at 6000 rpm (CNG) at 6000 rpm (CNG, commercial vehicle) Maximum torque: at 4200 rpm at 2900 rpm (commercial vehicle) at 4300 rpm (CNG) at 2800 rpm (CNG, commercial vehicle)

Applications: Transversal: 2020–2025 Suzuki Dzire (India/Nepal) 2021–2024 Suzuki Swift (India/Nepal/Bangladesh) 2019–present Suzuki Baleno/Toyota Glanza (India) 2022–present Suzuki Wagon R (India) 2023–present Suzuki Fronx (India/Nepal) 2024–present Toyota Urban Cruiser Taisor Longitudinal: 2022–present Suzuki Eeco 2023–present Suzuki Super Carry

K14B

Similar as K12B, this engine was also used by Suzuki's former joint venture partner in China. Known under E-Power EA14 or JL473Q1 names.

Technical specifications: Displacement: Bore and stroke: 73 mm x 82 mm Valvetrain: DOHC, 16-valve, VVT Compression ratio: 10.0–11.0 Maximum power: at 6000 rpm at 6000 rpm (CNG) Maximum torque: at 4000–4800 rpm at 4000–4800 rpm (CNG)

Applications: 2007–2010 Suzuki Landy (China) 2010–2017 Suzuki Swift 2011–2018 Changhe Spla (China/South America) 2012–present Changhe Big Dipper 2012–2016 Changhe Ideal 2012–2019 Suzuki Ertiga 2013–2015 Chana Eulove 2013–2021 Changan Alsvin 2013–2016 Changan CX20 2013–2017 Mazda VX-1 (Indonesia) 2013–2018 Changhe Suzuki Liana (China) 2014–2023 Changan BenBen 2014–2015 Chana Taurustar 2014–2017 Changan Alsvin V3 2014–2025 Suzuki Ciaz 2015–2020 Changhe M50S 2016–2019 Proton Ertiga (Malaysia) 2017–2022 Suzuki Baleno 2020–2022 Toyota Starlet (Africa) 2020–present Changan Star van

K14C Boosterjet version of K14B engine with direct injection and turbocharger. This engine is no longer available since mid-2020 for European market and replaced by K14D Boosterjet mild hybrid engine.

Technical specifications: Displacement: Bore and stroke: 73 mm x 82 mm Valvetrain: DOHC, 16-valve, VVT Compression ratio: 9.9 Maximum power: at 5500 rpm Maximum torque: at 1500–4000 rpm

Applications: 2015–2025 Suzuki Vitara/Escudo 2016–2025 Suzuki SX4 S-Cross 2018–present Suzuki Swift Sport

K14D Reworked K14C Boosterjet engine for European market. Combined with a 48-volt SHVS mild hybrid technology to pass Euro 6d emission standard.

Technical specifications: Displacement: Bore and stroke: 73 mm x 82 mm Valvetrain: DOHC, 16-valve, Dual VVT Compression ratio: 10.8 Maximum power: at 4500 rpm (Europe from 2025) at 5500 rpm at 3000 rpm (electric motor) Maximum torque: at 2000 rpm at 3000 rpm

Applications: