Acura RDX 4th generation (2025–2025) — Key Programming Reference
- Difficulty
- medium
- Lishi / lockout
- HON66
Key fobs & transponder keys (2 variants)
| Key | Years | FCC ID | P/N | Chip | Freq | Battery | Blade |
|---|---|---|---|---|---|---|---|
| 433.92 MHz · KR5TP-2 | 2025 NA — late-cycle 3rd-gen RDX (TC1/2), carries 2022-2025 KR5TP-2 platform | KR5TP-2 | 72147-TJB-A21 | NXP HITAG-AES (NCF29A1M, ID4A, 128-bit) | 433.92 MHz | CR2032 | HON66 emergency insert |
| 923.6–926.2 MHz · KR5BTP | 2025 NA — A-Spec Advance / Advance trims with remote start (dealer-fitted 2022-2025) | KR5BTP | 72147-TJB-A61 | Philips ID 47 (NXP HITAG-AES / NCF29A1M, Honda 4A) | 923.6–926.2 MHz (narrowband DTS, bidirectional) | CR2032 | HON66 |
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: required — NASTF + Lonsdor K518 + dealer.
- Online / server access: required — Honda AES cloud token.
- On-board (no tool) sequence: not available — Acura RDX 4A AES requires professional OBD tool — no self-programming procedure.
- On site: engine off · Maintain 12V+ · Clear IMMO DTCs.
- Bring: Photo ID + vehicle registration. VIN cross-check before start.
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 Acura RDX (2025-2025) uses NXP HITAG-AES (NCF29A1M, 4A, 128-bit) — newest Honda/Acura security. Requires AES cloud token (Autel IMKPA Honda ~$5-15/session / Lonsdor K518 USA Honda AES module / Xhorse KH100). PIN mandatory for AKL (NASTF VSP or dealer-bound on 2024+ VINs).
- Smart proximity or remote head key: ensure existing key fob battery is functional before starting.
- Verify chip before booking (this chassis facelift): Honda spans ID13 (pre-2003) → ID46 V chip (2003-2014) → ID47 (2014-2017) → 4A AES (2018+); Toyota spans 4C (1998-2002) → 4D67 dot (2003-2007) → G chip (2008-2013) → H 8A (2014+). Some facelift mid-MY chassis swap chip — confirm transponder ID from a working key with Lonsdor K518 reader before quoting.
- Tool kit context: Autel IMKPA + Honda/Toyota cloud token (~$5-15/session) and Lonsdor LKE Smart Key Emulator for K518 simulated-key flow are the dominant accessories. Xhorse KH100 + Honda/Toyota module confirmed. APB112 simulator, G-Box bench EEPROM NOT typically needed. XP400 PRO only for BCM/IMMO bench fallback.
- All existing keys erased. Bring ALL replacement keys before starting — minimum 2.
- No manual AKL for Acura RDX 4A AES — professional tool mandatory.
- AKL for 4A AES via OBD; older chassis sometimes need bench EEPROM dump (Honda ID13 / Toyota 4C).
- Keep all existing/lost key fobs at least 10 metres from vehicle during AKL.
- AKL accessory needs: Autel IMKPA + Honda/Toyota AES token for cloud calc on newest VINs, Lonsdor LKE Smart Key Emulator for K518 simulated-key AKL path, Xhorse KH100. APB112 NOT mandatory. G-Box bench EEPROM NOT used. XP400 PRO only if BCM/IMMO EEPROM corrupted (rare).
Lockout
Door pick / decode: Lishi HON66 (CW).
30 verified sources · Last verified: 2026-08-09
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.