put the chassis number of any BM you are considering buying in one of the various decoder tools before purchase, and see what toys it was built with and or had officially added
https://bimmer.work/ is getting the codes right, but bringing the car descriptions
https://www.mdecoder.com/ this is working
Other equipment
X0321 Headlight left asymetric
X0326 Speedometer mph
X0350 Exhaust system, chrome
X0381 Operating instructions, English
X0519 Heated handlebar grips
X0530 RDC (German for tyre pressure sensors)
X0539 On-board computer
X0588 Turn indicator, white
X0589 Hand protector
X0603 Alarm system
X0630 I-ABS generation 2
X0650 Traction control of the vintage these bikes had comes in called ASC and is another pay for option you can have if its got ABS
in the good old days, you could type the Reg number into the BM used warranty site, get the chassis number and then go to etk and get an official BMW version. But they killed it all about 3 years back.... that way autotrader ads gave u everything....