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Mercury Mariner Key Replacement
Mercury Mariner keys date back to 2005 and span 1 key system across the model’s generations — transponder (pats). 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 Mariner Keys
Verified key reference for the Mercury Mariner — 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 |
|---|---|---|---|---|
| Mariner | 2005–2009 | Transponder (PATS) | Texas Crypto 4D63 (80-bit) | H92 / H84 (shares Escape) |
| Mariner | 2010–2011 | Transponder (PATS) | Texas Crypto 4D63 DST80 (80-bit) | H92 / HU101 — confirm by VIN (shares Escape) |
Security System & Immobilizer
Mercury vehicles run Ford’s SecuriLock/PATS immobilizer of their era — 4D63 transponders and remote-head keys — still fully serviceable despite the brand’s retirement.
On the Mariner specifically we see: Texas Crypto 4D63 (80-bit), Texas Crypto 4D63 DST80 (80-bit). 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?
- 2005–2009: Transponder (PATS) — Texas Crypto 4D63 (80-bit) (H92 / H84 (shares Escape))
- 2010–2011: Transponder (PATS) — Texas Crypto 4D63 DST80 (80-bit) (H92 / HU101 — confirm by VIN (shares Escape))
Our Mariner 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
Mercury Mariner Key FAQ
I lost the only key to my Mariner. 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 Mariner?
On transponder-era cars it opens doors and nothing else — the chip must be programmed to the immobilizer, which is what we do curbside.
How fast can you reach my Mariner in DFW?
We dispatch the nearest mobile unit metroplex-wide, 24/7 — call (214) 717-6398 for an honest ETA.