2024-01-03. Since October 2023, a new maintenance schedule is valid for all K5x models. For the first time, maintenance positions for the cardan shaft (Driveshaft) are included. NOTICE: 1. The new maintenance schedule is not limited to vehicles affected by the SI 33 02 22 (SERVICE ACTION: Swingarm Drain retrofit and Driveshaft Check), but is valid for all K5x models - including retroactively. In case of retroactive validity (model year 2023 and older), affected customers will be informed about the change. This will be in the form of a direct-to-customer letter with a description of the new maintenance schedule, specific owner’s manual insert, and consumer warranty book insert. 1. For vehicles affected by SI 33 02 22 (SERVICE ACTION: Swingarm Drain retrofit and Driveshaft Check), this service action must be performed first. All conditions described in this bulletin apply after the open Service Action has been completed. No additional communication is required for K5x models model year 2024 and onwards. Those models have the new maintenance schedule in their owner’s manual. NHTSA's copy of the document (PDF)
Bulletins from the manufacturer that mention a maintenance schedule or a service interval, as NHTSA summarises them. They are not the schedule itself: read the document, and the owner's manual.
Position 8 of a VIN names the engine on many vehicles: how to read a VIN. Safety equipment depends on the trim, so decode a VIN to see what one vehicle has.