I have a 3 year old CSR. I play say 12-15 hrs a week. The downshift sensor failed near 2 years of age. Fanatec replaced it promptly. Now its 3 years old and it went again. To be fair I reckon its 500-600,000 downshifts. I sent an email, for £17 incl postage they shipped a new printed circuit board (the sensor is an integral part of the pcb) . It was here 2 days after payment. Its installed now and all good.