The 21.4 update is often the focal point of the used market. A unit "locked" at 21.4 is worth significantly more than one running older software (like 17.4 or 18.2), as it represents the maximum possible capability the hardware will ever achieve.
Forced regeneration commands for light and medium-duty diesel trucks. snap-on solus ultra 21.4 update
The was a pivotal release that extended the tool’s reach into 2021 model‑year vehicles and added dozens of new functional tests – especially for Ford, Holden, Fuso, and Hyundai. For technicians who rely on their SOLUS Ultra daily, updating to 21.4 (or later) unlocks deeper diagnostics, faster troubleshooting, and fewer “vehicle not supported” messages. The 21
: Included updates for Alfa Romeo (2018–2020), BMW (Rear-Axle Slip-Angle Control/Brake Flush), and Jeep (2017–2020 Compass). Enhanced Data & Testing The was a pivotal release that extended the
On your Solus Ultra, select Tools , then choose Connect to PC .
The 21.4 software release focuses heavily on maximizing the hardware capabilities of the SOLUS Ultra. Key enhancements include: