Stage 1 (gains)
diesel turbo often +15-30%; NA petrol low gain
Stage 1 (prix indicatif)
€120-€300 retail / €20-€60 file service
Temps d'intervention
5-30 OBD/bench; external flash work longer
Niveau requis
DIY possible for experienced users; soldering may be required
Outils nécessaires
K-line/bench/chip programmer + PSU + EEPROM/flash backup
Fiabilité
high but depends on old ECU condition
Mémoire / Flash
external flash 29F400/29F800 class
Lecture / écriture possible
Boot open required; OBD no open
Protocole de communication
Legacy Bosch ME7; OBD/boot/bench varies; external flash common
Sécurité / protection
legacy external flash
Cadre légal
FR/DE/CH/EU: road use may be illegal if emissions/noise/type-approval affected; track/export disclaimer required; verify local law