Breva 1100 rear lights?

Does anyone know if you can change the LED bulbs in a Breva 1100 rear brake light unit or do you have to purchase the whole assembly? Any reply really appreciated

It is a sealed unit, having said that some people have taken them apart and soldered in new LEDs not sure how successful that has proved, the part number for the breva rear light is 883314 and list price is £103.40 plus vat fowlers of Bristol web site is very good for locating parts and up to date prices. I always use corsa italia as I have found their service to be excellent

Thanks the reply and thought it might have been a sealed unit.