Viper. The last one was off the internet Its the same as rhe v8 x5 petrol about 60 quid from memory. As an aside when I investigated my first issue I noticed the previous owner had changed to a K and n there was a trace of oil inside the maff on the mesh, never been a fan of k and n and replaced with a standard air filter also the big air pipe near the wheel was also cleaned it was the ribbed type I found it had grit lodged in the ribs I changed it to a smooth pipe much more substantial. As we all know a huge amount of heat is generated in that very cramped space with no real air circulation and every now and then it throws out a gremlin. The joys of series1 ownership but hey what a car......
