The Suzuki SX4 is a compact car developed jointly by Japanese automaker Suzuki and Italian automaker Fiat. In some European markets the SX4 is sold as the Fiat Sedici, and in some Asian markets as the Maruti Suzuki SX4. It was designed by Giorgetto Giugiaro's Italdesign Giugiaro studio and has been produced since 2006.
Although originally intended solely for Europe, the SX4 is sold in most of Suzuki's international markets. It is available in hatchback and, for some markets, sedan body. Especially in the hatchback version, SX4 occupies a specific market niche of Mini SUV crossovers. Depending on the market, it is available with petrol engines in the 1.5–2.0 litre range, and Fiat's 1.3–2.0 litre range diesel engine. The hatchback is also available with four-wheel drive.
SX4 competed in the 2007 and 2008 seasons of the World Rally Championship, within the Suzuki World Rally Team, but the company withdrew from the competition.