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Cadillac XT4 Key Replacement
Cadillac XT4 keys date back to 2019 and span 3 key systems across the model’s generations — smart proximity; hitag 2 ext./id46e; smart proximity (5-btn). DFW Keys 4 Cars cuts and programs every one of them at your location anywhere in Dallas–Fort Worth, 24/7 — spares, all-keys-lost, fobs and lockouts. Call (214) 717-6398.
About XT4 Keys
Verified key reference for the Cadillac XT4 — model years, key types, and the transponder/immobilizer each generation uses. Boundary years can overlap; we confirm the exact part by VIN before dispatching.
| Model / Generation | Years | Key Type | Transponder / Immobilizer | Blade / FCC |
|---|---|---|---|---|
| XT4 | 2019–2021 | Smart proximity | Hitag2 Ext. / ID46E – FCC HYQ2EB (later HYQ2ES) | HU100 emergency insert |
| XT4 | 2019-2021 | Hitag 2 Ext./ID46E | HYQ2EB | PCF7937E, PCF7961E |
| XT4 / XT5 / XT6 | 2020–2025 | Smart proximity (5-btn) | ID46-class – FCC HYQ2ES (433 MHz), PN 13522879/13544052 | HU100 emergency insert |
Security System & Immobilizer
Cadillac pioneered VATS resistor keys and moved through PassKey and PK3 transponders to ID46 keys and today’s proximity fobs.
On the XT4 specifically we see: Hitag2 Ext. / ID46E – FCC HYQ2EB (later HYQ2ES), HYQ2EB, ID46-class – FCC HYQ2ES (433 MHz), PN 13522879/13544052. A correctly cut but unprogrammed key turns the locks and never starts the engine — programming is the half of the job that matters.
Which key does your year have?
- 2019–2021: Smart proximity — Hitag2 Ext. / ID46E – FCC HYQ2EB (later HYQ2ES) (HU100 emergency insert)
- 2019-2021: Hitag 2 Ext./ID46E — HYQ2EB (PCF7937E, PCF7961E)
- 2020–2025: Smart proximity (5-btn) — ID46-class – FCC HYQ2ES (433 MHz), PN 13522879/13544052 (HU100 emergency insert)
Our XT4 Key Services
- Key replacement — lost, stolen or broken keys cut from code and programmed on-site, including all-keys-lost by VIN
- Spare key duplication — cheap insurance done in one short visit
- Fob & transponder programming — remotes and smart keys paired to the immobilizer
- Lockout service — damage-free entry, 24/7
- Ignition repair — worn cylinders and keys that won’t turn
Cadillac XT4 Key FAQ
I lost the only key to my XT4. What now?
We come to the vehicle, verify ownership, cut a new key from the VIN, and program it on-site — no tow, no dealer wait.
My XT4 is push-to-start — can you program that outside the dealer?
Yes. Late models (2020–2025) use a proximity smart key on ID46-class – FCC HYQ2ES (433 MHz), PN 13522879/13544052 — we carry the fobs and the programmer, and we cut the emergency blade.
Do you still stock keys for older XT4s?
Yes — back to the 2019–2021 generation (smart proximity), and a fresh code-cut key beats any copy of a worn original.
How fast can you reach my XT4 in DFW?
We dispatch the nearest mobile unit metroplex-wide, 24/7 — call (214) 717-6398 for an honest ETA.