BMW Secure Coding Service
Your 2021+ BMW rejects coding with a signature error? Send your FA and SVT files below and we return signed NCD files that E-Sys accepts — usually within a few hours.
What is Secure Coding?
Since integration level 21-03 (March 2021), BMW digitally signs coding data — E-Sys still reads everything, but writes fail with "signature check failed". This service generates your coding files in the signed NCD 2.0 format the car expects, so hidden features, retrofits and comfort options code like before.
| Your BMW | Affected by Secure Coding? |
|---|---|
| G Series built or updated after March 2021 (I-level 21-03+) | Yes — needs signed NCD files |
| New generation (G6x, G7x, iX, i4, i5, i7, XM) | Yes — Secure Coding from the factory |
| G Series still on a pre-21-03 I-level | No — regular E-Sys coding works |
| E & F Series | No — not affected at all |
Not sure which I-level your car is on? E-Sys shows it after connecting, or just send us your VIN — we will check for free.
How it works
Four steps, no appointment needed. You stay in E-Sys the whole time.
- Export your FA and SVT from E-Sys Read the FA, calculate the SVT, save both as XML — takes under a minute. Stuck? We will guide you.
- Send us the files Use the upload form above, or message them to us on Telegram or WhatsApp.
- Pay securely One-time $50 via Stripe — pay before or after sending the files.
- Receive your signed NCD files & flash Signed NCD files come back the same way you contacted us — usually within minutes during working hours. Import in E-Sys and code.
Secure Coding FAQ
If E-Sys reads your car fine but coding writes fail with a signature or certificate error, your car is on Secure Coding. It applies to BMW, MINI and Rolls-Royce on integration level 21-03 or newer — in practice most G-series cars built or software-updated after March 2021.
Two XML exports from E-Sys: the FA (your vehicle order) and the SVT (calculated target). Both take under a minute to export. If you only have the FA, send it anyway — we will tell you if the SVT is needed for your case.
Yes. The signed NCD files we generate contain the same kind of coding data BMW writes at the factory — nothing is patched or bypassed in the car itself. Keep a backup of your original NCDs (we will remind you how) and you can always return to stock.
During working hours (8 AM–10 PM Pacific) usually within minutes, and almost always the same day. You receive them by email or in the same Telegram/WhatsApp chat you used.
Absolutely. Our remote ESys Coding Setup installs everything on your laptop and includes a guided session where we export the files together and flash the result. Secure Coding generation can be bundled into that session.