- (214) 717-6398
- info@dfwkeys4cars.com
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Cadillac STS Key Replacement
Cadillac STS keys date back to 1998 and span 4 key systems across the model’s generations — transponder; remote-head key; philips crypto 2/hitag2/id46; hitag 2 ext./id46e. 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 STS Keys
Verified key reference for the Cadillac STS — 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 |
|---|---|---|---|---|
| Seville / STS | 1998–2005 | Transponder | Megamos 13 / ID13 (PassKey III) | B106/B107 (GM 10-cut) – confirm by VIN |
| STS / XLR | 2004–2009 | Remote-head key | Philips Crypto 2 / Hitag2 / ID46 (PCF7936) | B111 / HU100 |
| STS | 2005-2007 | Philips Crypto 2/Hitag2/ID46 | — | PCF7936 equivalent |
| STS | 2008-2011 | Hitag 2 Ext./ID46E | M3N5WY7777A | PCF7952E, PCF7941E |
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 STS specifically we see: Megamos 13 / ID13 (PassKey III), Philips Crypto 2 / Hitag2 / ID46 (PCF7936), M3N5WY7777A. 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?
- 1998–2005: Transponder — Megamos 13 / ID13 (PassKey III) (B106/B107 (GM 10-cut) – confirm by VIN)
- 2004–2009: Remote-head key — Philips Crypto 2 / Hitag2 / ID46 (PCF7936) (B111 / HU100)
- 2005-2007: Philips Crypto 2/Hitag2/ID46 — — (PCF7936 equivalent)
- 2008-2011: Hitag 2 Ext./ID46E — M3N5WY7777A (PCF7952E, PCF7941E)
Our STS 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 STS Key FAQ
I lost the only key to my STS. 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.
Will a hardware-store copy start my STS?
On transponder-era cars it opens doors and nothing else — the chip must be programmed to the immobilizer, which is what we do curbside.
Do you still stock keys for older STSs?
Yes — back to the 1998–2005 generation (transponder), and a fresh code-cut key beats any copy of a worn original.
How fast can you reach my STS in DFW?
We dispatch the nearest mobile unit metroplex-wide, 24/7 — call (214) 717-6398 for an honest ETA.