Claas Arion 420 Generations
The Claas Arion 420 was built across 1 generations we cover, each with a different engine lineup — pick yours to keep the numbers on the next pages accurate.
Continue by selecting your Claas Arion 420 generation from the 1 listed below. The engine list on the next page is specific to whichever one you pick.
Frequently asked questions
Do all Claas Arion 420 generations support the same tuning stages?
No — available stages depend on the specific engine in that generation, not the model as a whole. Once you pick your engine, its performance page shows exactly which stages apply.
Does turnaround time differ between Claas Arion 420 generations?
Not meaningfully — most Claas Arion 420 files across generations are handled within a few hours of upload, regardless of which ECU the generation uses.
Is my Claas Arion 420 generation supported for safe remapping?
If it's listed in our catalogue, yes — every engine in every generation shown here has been worked before, with stage limits set to stay within that engine's mechanical margins.
How do I know which Claas Arion 420 generation I have?
Check your vehicle registration document for the build year, or look up the chassis code — both narrow it down to one of the generations listed here.