Toyota has voluntarily recalled more than 18,000 cars in the UK to carry out modifications to fuel systems.Toyota, which also owns Lexus, has recalled the Avensis and IS 250 to carry out modifications to the fuel systems due to fears both models could be at risk of fuel leaks.The Toyota Avensis issue affects certain 2.0-litre and 2.4-litre petrol models, produced between July 2000 and September