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Buick LaCrosse Key Replacement
Buick LaCrosses have been on Dallas–Fort Worth roads since the 2005 era, and across 8 key generations this model has used 7 different key systems — transponder key; “passkey 3 (pk3) / megamos crypto 48”; “passkey 3+ / philips crypto 46”; remote-head flip key. Whichever yours is, DFW Keys 4 Cars cuts and programs it at your location, 24/7: spare keys, lost-everything replacements, fob programming, and lockouts. Call (214) 717-6398.
About LaCrosse Keys
The table below is our verified key reference for the Buick LaCrosse — model years, key types, and the transponder/immobilizer family each generation uses. Generations overlap at boundary years, so we always confirm the exact part by VIN before dispatching.
| Model / Generation | Years | Key Type | Transponder / Immobilizer | Blade / FCC |
|---|---|---|---|---|
| LaCrosse / Allure | 2005–2006 | Transponder key | Passkey 3 (PK3) / Megamos Crypto 48 | B99 / B102 (GM39) |
| LaCrosse | 2005-2006 | “Passkey 3 (PK3) / Megamos Crypto 48” | Transponder key | |
| LaCrosse / Allure | 2007–2009 | Transponder key | Passkey 3+ (“Circle Plus”) / Philips Crypto 46 | B111 / B106 (GM45) |
| LaCrosse | 2007-2009 | “Passkey 3+ / Philips Crypto 46” | Transponder key | |
| LaCrosse / Allure | 2010–2016 | Remote-head flip key | Hitag2 Extended / ID46, ID46E | HU100 (B111-family) |
| LaCrosse | 2010-2016 | “Hitag2 Extended / ~ID46, ID46E / PCF7937E, NCF2951E” | Remote head key | |
| LaCrosse | 2017–2019 | Smart / proximity (PEPS) | Hitag2 Extended / ID46, ID46E | HU100 emergency insert |
| LaCrosse | 2017-2019 | “Hitag2 Extended / ~ID46, ID46E / PCF7952E, PCF7961E” | Remote head key |
Security System & Immobilizer
Buick uses GM’s security systems by era: PassLock cylinders with plain keys, PK3/PK3+ transponders, ID46 keys, and current proximity fobs.
On the LaCrosse specifically, the immobilizer families we see are: Passkey 3 (PK3) / Megamos Crypto 48, Transponder key, Passkey 3+ (“Circle Plus”) / Philips Crypto 46, Hitag2 Extended / ID46, ID46E, Remote head key. A key that is cut correctly but not programmed to this system will turn the locks and never start the engine — programming is the half of the job that matters.
Which key does your year have?
- 2005–2006: Transponder key — Passkey 3 (PK3) / Megamos Crypto 48 (B99 / B102 (GM39))
- 2005-2006: “Passkey 3 (PK3) / Megamos Crypto 48” — Transponder key
- 2007–2009: Transponder key — Passkey 3+ (“Circle Plus”) / Philips Crypto 46 (B111 / B106 (GM45))
- 2007-2009: “Passkey 3+ / Philips Crypto 46” — Transponder key
- 2010–2016: Remote-head flip key — Hitag2 Extended / ID46, ID46E (HU100 (B111-family))
- 2010-2016: “Hitag2 Extended / ~ID46, ID46E / PCF7937E, NCF2951E” — Remote head key
- 2017–2019: Smart / proximity (PEPS) — Hitag2 Extended / ID46, ID46E (HU100 emergency insert)
- 2017-2019: “Hitag2 Extended / ~ID46, ID46E / PCF7952E, PCF7961E” — Remote head key
Our LaCrosse Key Services
- Key replacement — lost, stolen or broken LaCrosse keys cut from code and programmed on-site, including all-keys-lost by VIN
- Spare key duplication — the cheap insurance; most LaCrosse spares are done in one short visit
- Fob & transponder programming — remotes, fobiks and smart keys paired to the immobilizer
- Lockout service — damage-free entry when the keys are inside, 24/7
- Ignition repair — worn cylinders and keys that won’t turn
Buick LaCrosse Key FAQ
I lost the only key to my LaCrosse. 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 — this is our most common LaCrosse call.
Will a hardware-store copy start my LaCrosse?
It will open the doors and nothing else on transponder-era cars — the chip inside the key must be programmed to the immobilizer, which is the part we do curbside.
My LaCrosse is older — do you still stock keys for it?
Yes. We carry blanks and chips going back to the 2005–2006 generation (transponder key), and a code-cut fresh key usually turns a worn lock better than any copy of your worn key.
How fast can you reach my LaCrosse in DFW?
We dispatch the nearest mobile unit across the whole metroplex, 24/7. Call (214) 717-6398 with your location and we’ll give you an honest ETA.