The Society of Automotive Engineers (SAE) defined the J2534 standard to give independent repair shops access to emissions-related module reprogramming. Stellantis (formerly FCA/Chrysler) fulfills this mandate through their specialized pass-thru application.

| Tool | Use Case | Risk Level | |------|----------|-------------| | (with J2534) | BCM, RFH, IPC changes (not full reflash) | Low | | HP Tuners MPVI3 | PCM/TCM custom tuning (not stock flashing) | Medium | | AutoEnginuity | Diagnostics + limited reflash | Low |

Add the application to Windows Firewall exceptions. Use a hardwired Ethernet connection.

The Complete Guide to the Chrysler J2534 Flash Application: Master OEM Reprogramming