The CITROEN C4 (2004-08) 5DR HATCHBACK 1.6 BIOFLEX 16V 110 SX is a five-door family hatchback from the mainstream small-car class, offering everyday space without the size of a saloon. Its rounded, distinctive styling stood apart from rivals such as the Ford Focus, Vauxhall Astra and Volkswagen Golf. In the UK, this C4 suits couples, small families and commuters needing a practical cabin, easy access through rear doors and a boot for shopping or luggage. The 1.6-litre 110 engine gives straightforward performance, while the BioFlex badge is a notable feature associated with flex-fuel capability in some markets; check the individual car’s fuel requirements and history. Compared with class favourites, the C4 is a more individual-looking alternative, with comfort and distinctive cabin details among its appeals. Mycarcheck checks are very limited: two look-ups covered one VIN. Their recorded averages were £800, 85,000 miles and three previous keepers, not market-wide figures.