I cant find Bosch ones on eBay and for $50 its probably worth having a spare if needed. However I will wait to hear from the more experienced on this forum, but if the Bosch is a lot more it's probably not worth it till it fails, if it ever does.

Must add that I don't rate Bosch as I have had a number (5 or 6 items) of their home appliances, I know thats different to car parts, but all have failed early and cheaper products have continued to work on and on.......you don't always get what you pay for !!!

I do stand to be corrected by you guys who have much more experience than me and I will probably do what's recommended here.