ECU IMMO OFF / Decoder Service
Professional immobiliser removal and decoding for trade customers. Resolve mismatched ECUs, lost key data, immobiliser system failures and ECU swap conversions. Same-day file service via WhatsApp.
Retail customer? See our standard ECU remapping services instead.
Same-day files
Most files returned within hours
All major platforms
Bosch, Siemens, Delphi, Denso, Marelli
Tested files
Every file checked before return
Legitimate use only
Repair / diagnostic / ECU replacement
Supported ECU Platforms
We work on most ECU platforms used across European, Japanese and Korean vehicles.
Bosch EDC / ME / MED / MEx
Full Bosch platform coverage.
Siemens / Continental
Including PCR2.x and SIM series.
Delphi ECUs
DCM and CRD platforms.
Denso ECUs
Toyota, Mazda, Subaru and others.
Magneti Marelli
MJD, IAW and related units.
PSA / Renault / VAG systems
Wide European coverage.
And many more
Send the ECU details — we very likely cover it.
What We Provide
A complete IMMO OFF / decoder pipeline — software modification, file preparation and testing before return.
- ECU immobiliser removal (software-based)
- ECU decoding for plug-and-play use
- EEPROM & flash modification
- Virgin / reset ECU preparation
- ECU cloning support (if required)
- Data correction and recovery
- Full file testing before return
How It Works
Fast file-based workflow. Send the file, get a tested IMMO OFF version back.
Send file, receive IMMO OFF version
- 1
Read the ECU file using OBD, Bench or Boot mode
- 2
Send the file via WhatsApp or email with vehicle details and fault description
- 3
We safely remove or bypass the immobiliser data
- 4
Write the modified file back to the ECU and start the vehicle
Vehicles Covered
Check if we service your module
Paste an ECU type or part number from your faulty module and see instantly whether we cover it, what services we offer, and the starting price.
Database includes ECUs, BCMs, FEM/BDC, CEM, instrument clusters, TCUs, ABS modules and more.
Our coverage database grows with every job we complete. If your specific part number isn’t listed but the ECU type matches, there’s a strong chance we still cover it — ask us.
Pricing
Pricing is case by case and depends on the vehicle, the service required, and whether it’s a file or a physical module.
Send us the details — we’ll confirm a firm price and turnaround before any work begins. Regular trade customers can set up an account with agreed rates.
Important — legitimate repair use only
IMMO OFF services are provided strictly for legitimate repair, diagnostic and ECU replacement purposes — for example, a damaged ECU, a corrupted immobiliser system, or an ECU swap during engine repair work.
It is the responsibility of the garage, technician or end customer requesting the service to ensure compliance with all applicable local laws and the laws of the country in which the vehicle is operated. Doyen Auto Services Ltd accepts no liability for misuse.
Ready to send a file or module?
WhatsApp is usually the fastest way to reach us. Send vehicle details, the fault, and the original file if you already have it — we'll respond with a firm price and turnaround.
Doyen Auto Services Ltd · 59 Southcroft Road, Rutherglen, Glasgow G73 1UG · Tel 0141 483 0726 · Mobile 07760 926245 · support@doyenautos.co.uk