November 2025 – ECUFILES Release
Clean catalyst-off file released for VW, Audi, SEAT and Skoda 1.4 TSI engines using Bosch MED17.5.20 ECU.
We only disable what is strictly required for catalyst removal. The first lambda sensor stays 100% functional, all diagnostics remain active, and no extra systems are affected.
The result: no warning lights, full OBD functionality, and readiness_ok in many cases for easy inspections.
Benefits:
- Minimal and precise changes
- First lambda and diagnostics intact
- Zero error codes
- Readiness_ok in many cases
- Ideal for sporty driving
Enjoy the cleaner exhaust note without compromises.
Already available in your ECUFILES account.
