A BMW Part number is formatted like this: 00-00-0-000-000. The first two digits reveal the section that the part belongs to.
SS-00-0-000-000
The section numbers that I know about are as follows:
- 07 - generic parts such as lubricants, fasteners, cable etc.
- 11 - engine
- 12 - engine electrical system
- 13 - engine - fuel preparation system (injectors etc.)
- 16 - fuel supply (tank, pump, pipes etc.)
- 18 - exhaust system
- 21 - clutch
- 23 - transmission (manual)
- 24 - transmission (automatic)
- 25 - gear lever
- 26 - drive shaft
- 31 - suspension (front)
- 32 - steering
- 33 - suspension (rear)
- 34 - brakes
- 35 - pedals
- 36 - wheels
- 41 - bodywork
- 51 - trim, interior fittings etc.
- 52 - seats
- 54 - sunroof
- 61 - body electrical systems
- 62 - instrument cluster
- 63 - lighting
- 64 - cabin heating and climate control
- 65 - audio
- 66 - park distance control
- 71 - tools (that are supplied with car e.g. boot toolkit)
- 72 - seatbelts / airbags etc.
- 81 - lifestyle e.g. jackets and keyrings
- 82 - accessories e.g. roof boxes, upgrade kits for heated seats etc.
- 83 - car care products
- 84 - communications