There's an ex-daihatsu dealership in Dukinfield, they're probably the best bet. It's a common problem, usually either condensation (I keep kitty litter in my boot, or a proper dehumidifier satchel) or sometimes the seal around the top brake light can leak. Some people have gotten their roof/boot ECU's working again by drying them out thoroughly. If they need replacing, you might find it a whole lot cheaper looking for a second-hand version. PREMIER in DUKINFIELD | Kia Car Dealer Dukinfield - Manchester | Kia UK