For every set of illuminated TSI's bought from me I will honour a £10 repair fee if LED's fail in the distant future (or any other electrical failure with the unit).  They have currently been on a test car since mid April so longevity is unknown as of yet bt it is expected they should easily outlast your average indicator bulb. Email This e-mail address is being protected from spambots. You need JavaScript enabled to view it if you have a failure and I will provide you details for you to send your TSI to me for repair at the above price (almost as cheap as a bulb). Obviously any failures from new will be issued replacement units free of charge (on a return basis if notified within 14 days of shipping).