Adding A Spare Key Fob — Cost & What To Bring
Adding a spare key fob costs $125 to $400 depending on the key type (transponder $125 to $250, flip fob $150 to $300, smart key $200 to $400), since the job is only programming a second fob to a system that already recognises one working key. It takes 15 to 30 minutes and is cheaper than an all-keys-lost job because ownership verification is simpler with a working key already in hand.
Getting a second fob before you need one, rather than after losing the only one, is one of the more overlooked ways to avoid a bad night.
Why a spare is cheaper than replacing a lost one later
| Adding a spare now | Replacing after loss | |
|---|---|---|
| Verification needed | Simple, existing key confirms ownership | More thorough, no working key to check against |
| Typical cost | $125–$400 | $225–$695 (all keys lost) |
| Time pressure | None, scheduled at your convenience | Often urgent, sometimes after-hours |
How many fobs can a car have?
Most vehicles support 2 to 4 programmed fobs at once, though the exact number depends on the make. If a household has multiple drivers, programming everyone a fob in one visit is usually the same job as programming one, just a bit more time.
What to bring for a spare fob appointment
- Your existing working key or fob — needed to add a spare
- Vehicle registration — standard practice, even with a working key present
- The new fob itself, if you bought one separately — or we can supply one
Buying a fob yourself vs having one supplied
Aftermarket fobs bought online are sometimes cheaper but occasionally incompatible with a specific trim or model year, which wastes the programming visit. Confirming compatibility before the appointment, or having the fob supplied as part of the job, avoids that problem.
Booking a spare key fob
Tell us the make, model, year, and whether you already have a fob or need one supplied. Ranges are on the prices page, full detail on key fob programming.