In a previous post I said I had been running a Bosch RE 55, which was incorrect, as it was actually RE 57 part # 9 190 067 010 (Sorry). I've been running three of these, two on cars, and one on a bike, and they seem to be foolproof. As mentioned on the above post, these are a direct replacement, and were readily available on Ebay Aus. Cheers, Dale.