For the following tachograph versions, a software update is legally required:  

• upon new installation  

• at the latest during the next maintenance/calibration  

VDO - DTCO 1381 - Version 4.1 (04.01.41) from 15.7.2026  

Stoneridge - SE 5000 - 8.1 (Rev B - D) from 1.9.2026