Audi A4 5th (B9) (2017–2024) — Key Programming Reference
- Difficulty
- hard
- Lishi / lockout
- HU66
Key fobs & transponder keys (1 variant)
| Key | Years | FCC ID | P/N | Chip | Freq | Battery | Blade |
|---|---|---|---|---|---|---|---|
| 433 MHz · IYZ-AK01 / IYZAK1A · 4M0959754AK | 2017–2024 all markets (2017–2018 = IYZ-AK01 grant 2014/2018; 2019–2024 = IYZAK1A grant 2019) | IYZ-AK01 / IYZAK1A | 4M0959754AK | Megamos AES (ID48 / Hitag Extended, NXP) | 433.92 MHz | CR2032 | HU66 |
Programming procedures
What the job needs
- Add a key: 1 existing working key required.
- All keys lost: no existing working key needed.
- PIN / security code: Audi Erwin / dealer ticket.
- Online / server access: required — None.
- On-board (no tool) sequence: not available — Audi B9 / MLB Evo (A4/A5/A6/A7/A8/Q5/Q7/Q8 2017+) is newer MQB-derivative with stricter security. Add Key/AKL requires Audi ONLINE security access (factory scan tool flow). Xhorse VVDI Key Tool Plus + ACDP module pair or Autel IM608 II with Audi MLB Evo package may work for some 2017-2020 builds. Newest builds (2021+) often require dealer with Audi VIN-bound security ticket. Confirm coverage with tool vendor before quoting.
- On site: engine off.
- Bring: Photo ID + vehicle registration. Title strongly recommended for AKL.
Tool coverage
Documented for this case on: Autel IM608 Pro II · Autel IM508S · Autel KM100 · Xhorse Key Tool Plus · Xhorse Key Tool Max Pro · Lonsdor K518 Pro / K519 · OBDSTAR X300 DP Plus · AutoProPad G2/G3 · Advanced Diagnostics Smart Pro · Launch X431 IMMO Elite / IMMO Plus. Step-by-step menu paths for each tool are in the app.
Notes & cautions
- This chassis (A4 B9 sedan, 2017-2024) spans the MLB Evo era with B9/B9.5 facelift split — pre-facelift (2017-2019) typically allows IM608 II + XP400 Pro + APB112 OBD cluster dump; B9.5 facelift (2020-2024) adds SFD2 layer for some VINs. Verify facelift status + SFD2 by VIN before quoting.
- Battery support recommended for VAG MQB session (cluster data dump takes time).
- Audi B9 / MLB Evo (2017+): can require dealer-only ONLINE security ticket for newest builds. Verify Autel/Xhorse coverage for the exact VIN before scheduling.
- AKL erases all existing key registrations — bring minimum 2 new key blanks (XSMA1EN or compatible MQB-prepared blank).
Lockout
Door pick / decode: Lishi HU66 (CW).
27 verified sources · Last verified: 2026-08-10
Open full case in KeyAssist →Step-by-step tool menu paths, verified source links and video guides for this case are in the KeyAssist app — free to start, works offline.