Snap-on Solus Ultra 21.4 Update

The 21.4 release was designed to give aging tools a "parting gift" of modern vehicle coverage and refined workflows.

: The unit cannot support newer LAN/LIN OBD protocols found on some newer vehicles. Software Bug snap-on solus ultra 21.4 update

The 21.4 software upgrade enhanced the SOLUS Ultra with several professional-grade diagnostic capabilities: The 21

: The Solus Ultra cannot connect to newer vehicles using LAN/LIN OBD communication protocols (e.g., Volvo models from 2017/2018 onwards), and hardware updates like new cables do not resolve this limitation. How to Install Updates Volvo models from 2017/2018 onwards)

Snap-on has confirmed that 21.4 includes patches for (Common Vulnerabilities and Exposures) related to Bluetooth pairing and diagnostic session hijacking, identified in Q1 2026 by third-party researchers. No active exploits have been reported in the field.