November 2025 – ECUFILES Release
New clean catalyst-off file for all VW, Audi, SEAT and Skoda 1.4 TSI engines with Bosch MED17.1.21 ECU.
Unlike common files that disable everything, we only disable what truly needs to be disabled for catalyst removal. The first lambda sensor stays 100% functional, all diagnostics remain active, and no unnecessary systems are touched.
This keeps your car free of warning lights and fully diagnosable. In many cases, we arrange readiness_ok so the OBD readiness test is passed without issues.
Key advantages:
- Minimal changes for maximum reliability
- First lambda and diagnostics intact
- No error codes
- Readiness_ok in many cases
- Perfect for decat downpipes
Enjoy a sportier sound and better flow – the clean way.
Already available in your ECUFILES account.
