Subaru Impreza 5th generation (2017–2023) — Key Programming Reference
- Difficulty
- hard
- Lishi / lockout
- TOY43AT
Key fobs & transponder keys (2 variants)
| Key | Years | FCC ID | P/N | Chip | Freq | Battery | Blade |
|---|---|---|---|---|---|---|---|
| 315 MHz · CWTWB1U811 | 2017–2018 | CWTWB1U811 | 57497-AL00A | Texas 4D60 (Subaru G, 80-bit) | 315 MHz | CR1620 | B110 |
| 433.92 MHz · HYQ14AHK | 2017–2023 | HYQ14AHK | 88835-FL03A | Texas DST-AES 8A (H-Master, 128-bit) | 433.92 MHz | CR2032 | TOY51 |
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: No PIN required.
- Online / server access: not required (offline programming).
- On-board (no tool) sequence: not available — Subaru Texas DST-AES 8A smart key IMMO requires OBD diagnostic tool.
- On site: engine off · Maintain 12V+ · Clear IMMO/BCM DTCs.
- Bring: Photo ID + vehicle registration.
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
- Impreza 5 (GK/GT) transitioned from Texas 4D60 G-key (2017) to Hitachi 8A DST-AES (2018+) mid-cycle. The chip change crosses the 2017-to-2018 MY boundary and is NOT trim-dependent. ALWAYS read existing key FCC label before ordering blank: HYQ14AHC = 4D60 G (2017 only), HYQ14AHK or HYQ14AKB = 8A H (2018+). Ordering wrong chip = USD 40-80 blank loss + delay.
- No external PIN required for Subaru Texas DST-AES 8A add key. Autel/Smart Pro reads IMMO data internally via OBD.
- No internet required for Autel add key on Subaru Texas DST-AES 8A. Smart Pro ADS2255/ADS2330 requires WiFi for AD server.
- Subaru smart system limit: maximum 4 keys per vehicle. If 4 already programmed, one must be erased before adding new key.
- Impreza 5 transitioned G->8A in 2018. Verify chip type by year/VIN before ordering.
- Impreza 5 2018+ AKL requires APB112 simulator for the 8A H-Master path. 2017 4D60 G AKL also requires APB112 but the IMMO sync sequence differs - tool must auto-detect chip era from BCM before AKL. If tool flashes wrong era, AKL aborts. Confirm tool firmware is 2024-08 or newer for reliable era auto-detect on Impreza 5.
- No external PIN required for Subaru Texas DST-AES 8A AKL.
- No internet required for Autel + APB112 AKL on Subaru Texas DST-AES 8A. Smart Pro requires WiFi for AD server.
- Subaru AKL on G-key / 8A proximity requires APB112 simulator (Autel) OR ADC2015 emulator cable (Smart Pro). Verify tool + accessory before scheduling.
- Min 2 new smart keys recommended for AKL.
- AKL erases all existing key registrations — any lost keys will not be retrievable.
- Impreza 5: AKL tool choice depends on chip (G needs APB112/ADC2015 + G key; 8A needs same accessories but 8A blank).
Lockout
Door pick / decode: Lishi TOY43AT (CW).
59 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.