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BMW X3 Key Replacement
BMW X3s have been on Dallas–Fort Worth roads since the 2004 era, and across 3 key generations this model has used 3 different key systems — metal/slot key; slot key / comfort access; comfort access / display 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 X3 Keys
The table below is our verified key reference for the BMW X3 — 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 |
|---|---|---|---|---|
| X3 (E83) | 2004–2010 | Metal/slot key | EWS4 / CAS | HU58 / HU92 (confirm by VIN) |
| X3 (F25) | 2011–2017 | Slot key / Comfort Access | CAS4 / FEM-BDC | HU100R |
| X3 (G01) | 2018–present | Comfort Access / Display Key | BDC2 | HU100R |
Security System & Immobilizer
BMW security marched from EWS through CAS2/CAS3/CAS4 to the FEM/BDC modules on current cars. Each module generation changes the key-programming approach — including bench work on some — which is exactly what our BMW tooling is for.
On the X3 specifically, the immobilizer families we see are: EWS4 / CAS, CAS4 / FEM-BDC, BDC2. 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?
- 2004–2010: Metal/slot key — EWS4 / CAS (HU58 / HU92 (confirm by VIN))
- 2011–2017: Slot key / Comfort Access — CAS4 / FEM-BDC (HU100R)
- 2018–present: Comfort Access / Display Key — BDC2 (HU100R)
Our X3 Key Services
- Key replacement — lost, stolen or broken X3 keys cut from code and programmed on-site, including all-keys-lost by VIN
- Spare key duplication — the cheap insurance; most X3 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
BMW X3 Key FAQ
I lost the only key to my X3. 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 X3 call.
Will a hardware-store copy start my X3?
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 X3 is older — do you still stock keys for it?
Yes. We carry blanks and chips going back to the 2004–2010 generation (metal/slot 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 X3 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.