Quick answer: A key shell is usually an empty case and blade housing: you transfer the existing circuit board, transponder chip and sometimes the blade. A complete remote includes electronics and may require blade cutting, remote programming and immobiliser coding by a qualified automotive locksmith.
Read the product description carefully. “Shell”, “case” or “blank” normally means electronics are not included. “Complete remote key” should explicitly identify the circuit board, transponder, frequency and compatible vehicles.
What is included?
| Component | Replacement shell | Complete remote |
|---|---|---|
| Case and buttons | Included | Included |
| Circuit board | Transfer old board | Usually included if stated |
| Transponder | Transfer carefully | Confirm type and coding |
| Programming | Usually none when transferred intact | Normally vehicle-specific |
Why the transponder matters
The immobiliser transponder authorises the engine to start and can be a separate small chip. If it is left in the old case or damaged, the remote buttons may work while the engine will not start. Work over a clear surface and seek a locksmith when uncertain.
Before ordering
Verify make, model, year, frequency, button layout, blade profile and transponder type. Confirm local cutting and programming availability. Do not force a circuit board into a mismatched shell or glue over electronics.
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FAQs
Will changing the shell erase programming?
Usually not when the original electronics and transponder are transferred intact.
Why do buttons work but the car will not start?
The transponder may be missing, damaged or not programmed.
Does a complete key arrive programmed?
It normally cannot be pre-programmed to your specific vehicle.
Vehicle-key work should only be performed for a vehicle you own or are authorised to service.