0+ (Unillustrated Parts)  
1+ Steering wheel  
2+ .Cancellation ring  
3+ .Slip ring contact spring  
4+ .Horn push switch  
5+ .Screw  
6+ Airbag module  
7+ Locknut  
8+ Nut cover  
9+ Time limit warning label  

The part numbers in the assembly image below relate to the product number in the table. Clicking on the part number will open up the relevant part details.