Delphi Autocom 2021.11 C4b Guide

The designation refers to the software version released in November 2021. The C4b suffix is crucial—it indicates a specific patch or build level. In the world of aftermarket diagnostics, "C4b" often denotes a corrected or updated database that fixes bugs present in earlier releases of version 2021.11. This build is particularly respected for its stability and improved coverage for key systems like engine control units (ECU), airbag modules (SRS), anti-lock braking systems (ABS), and automatic transmissions.

Unlike the official cloud-based versions that require heavy subscriptions, the C4b release is highly valued by independent shops for its stability, offline capabilities, and expanded database that covers vehicles up until the 2021 model year. Key Features of the 2021.11 Update Delphi Autocom 2021.11 C4b