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BMW 3 Series Key Replacement
BMW 3 Seriess have been on Dallas–Fort Worth roads since the 1999 era, and across 4 key generations this model has used 3 different key systems — metal 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 3 Series Keys
The table below is our verified key reference for the BMW 3 Series — 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 |
|---|---|---|---|---|
| 3 Series (E46) | 1999–2006 | Metal key | EWS3 / EWS4 | HU58 |
| 3 Series (E90/E91/E92/E93) | 2005–2013 | Slot key / Comfort Access | CAS2 / CAS3 / CAS3+ | HU92 |
| 3 Series (F30/F31/F34/F80) | 2012–2019 | Slot key / Comfort Access | FEM-BDC | HU92 / HU100R (confirm by VIN) |
| 3 Series (G20/G21/G80) | 2019–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 3 Series specifically, the immobilizer families we see are: EWS3 / EWS4, CAS2 / CAS3 / CAS3+, 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?
- 1999–2006: Metal key — EWS3 / EWS4 (HU58)
- 2005–2013: Slot key / Comfort Access — CAS2 / CAS3 / CAS3+ (HU92)
- 2012–2019: Slot key / Comfort Access — FEM-BDC (HU92 / HU100R (confirm by VIN))
- 2019–present: Comfort Access / Display Key — BDC2 (HU100R)
Our 3 Series Key Services
- Key replacement — lost, stolen or broken 3 Series keys cut from code and programmed on-site, including all-keys-lost by VIN
- Spare key duplication — the cheap insurance; most 3 Series 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 3 Series Key FAQ
I lost the only key to my 3 Series. 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 3 Series call.
Will a hardware-store copy start my 3 Series?
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 3 Series is older — do you still stock keys for it?
Yes. We carry blanks and chips going back to the 1999–2006 generation (metal 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 3 Series 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.