2010 Fiat panda 1.2 eleganza

Spares or repair, 2010 Fiat Panda 1.2 Eleganza, failed MOT on horn, now fixed, front tyre, and lambda reading of 1.06, maximum is 1.03. Maybe a simple fix for someone that knows these cars. Comes with electric front windows, electric mirrors, remote central locking, radio CD with aux in. Drives well, recently had a new clutch. Only other problem is the heater works intermittently. 550 no offers.