Lexus RX 4th (AL20) (2016–2022) — Key Programming Reference
- Difficulty
- medium
- Lishi / lockout
- TOY2
Key fobs & transponder keys (3 variants)
| Key | Years | FCC ID | P/N | Chip | Freq | Battery | Blade |
|---|---|---|---|---|---|---|---|
| 315 MHz · HYQ14FBB | 2016–2020 NA (RX350, RX350L, RX450h, RX450hL) | HYQ14FBB | 89904-0E160 | Texas H-8A (128-bit, DST-AES) | 315 MHz | CR2032 | LXP90 / TOY40 |
| 315 MHz · HYQ14FLB | 2021–2022 NA (facelift) (RX350, RX450h, RX450hL) | HYQ14FLB | 89904-0E180 | Texas DST-AES (H-8A) | 315 MHz | CR2032 | LXP90 / TOY40 |
| 433 MHz · 89904-48E20 | 2016–2020 export (RX350, RX450h, RX450hL) | n/a | 89904-48E20 / 89904-48J60 | Texas DST-AES ID8A + TIRIS RF430 (128-bit AES) | 433.92 MHz | CR2032 | LXP90 (TOY48) |
Programming procedures
What the job needs
- Add a key: 1 existing working key required.
- All keys lost: no existing working key needed.
- Online / server access: not required (offline programming).
- On-board (no tool) sequence: not available — Lexus RX AL20 H chip (DST-AES) smart key requires professional OBD tool — no self-programming procedure for proximity key transponder.
- 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 Lexus H-chip (Texas DST-AES Page1 H) smart key. RX AL20 (2016-2022) — H-chip smart key. Newer-era H-chip/8A on Autel needs IMKPA token (~$5-15/session). Lonsdor K518 USA + Honda/Toyota AES module covers G/H/8A natively. Xhorse VVDI Key Tool Plus needs 2024+ firmware for H-chip. Standard 16-pin DLC OBD path; no XP400 PRO bench, no APB112 simulator needed for OBD enrolment.
- Smart proximity key: ensure existing key fob battery is functional before starting.
- Two FCC generations span this case — HYQ14FBB (2016-2020) and HYQ14FLB (2021-2022). Not interchangeable. Identify from existing key FCC label.
- Post-2024 Autel US firmware: Toyota/Lexus add-key may be affected by TMNA restrictions — verify on current firmware.
- All existing keys erased. Bring ALL replacement keys before starting — minimum 2.
- No manual AKL for Lexus RX AL20 H chip smart key — professional tool mandatory.
- AKL for Lexus H chip typically needs dealer-issued PIN or EEPROM dump on some models — confirm OBD AKL path before quoting.
- Keep all existing/lost key fobs at least 10 metres from vehicle during AKL.
- Post-2024 Autel US firmware: Toyota/Lexus AKL reportedly restricted per TMNA — verify capability before booking.
Lockout
Door pick / decode: Lishi TOY2 (CW).
53 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.