PYRen is an open-source tool for Renault vehicles that can clear crash data on many TRW airbag modules (e.g., Renault Megane II, Clio III). It’s legal, free, and runs on Windows with a compatible K-Line or CAN interface. However, it only supports specific Renault–TRW combinations.
For automotive hobbyists or small workshops, these legitimate alternatives may cover your needs without the high cost of TRW Design Wizard:
Many professional scan tools incorporate TRW Design Wizard functionality through licensed integration:
Check with the tool manufacturer to confirm TRW Design Wizard compatibility.