No matter, if you just bought a new Kärcher or you have older one - Kärcher original spare parts and accessories are available for years. The most parts can be easily found in the machines manual. Usually, you find all spare parts in the manual, which can be changed without opening the complete Kärcher.
The possibility to download complete spare part lists was set for liability reasons. Of course, you may still buy all Kärcher spare parts, which are generally available, and perform the repair yourself.
Partially, some spare parts lists are provided in the internet. We can not completely recommend to use those lists. As some clients experienced, those lists may be old or contain mistakes.