Car Key Warranty & Guarantee — What to Look For
Not all replacement car keys come with the same warranty — or any warranty at all. Here's what a proper guarantee should cover, the questions to ask before you hand over your money, and how to spot an auto locksmith who stands behind their work.
What a proper car key guarantee should cover
A replacement car key has three components that can fail independently. Your warranty should cover all of them:
The key blade
Should be cut accurately to your vehicle's lock code. A properly cut key should turn smoothly in all locks. If it sticks, jams, or doesn't turn, it should be re-cut free of charge within the warranty period.
The transponder chip / immobiliser programming
This is the most critical part. If the immobiliser light flashes and the car won't start, the transponder isn't being recognised. This is a programming fault — not your problem to pay for again. A proper guarantee covers re-programming if the key loses sync with the car.
The remote electronics (buttons, circuit board)
Remote buttons should lock and unlock the car reliably. If the remote stops working within the warranty period (and it's not a dead battery), the electronics should be replaced or repaired.
What a standard warranty looks like — and what it should be
| Component | Minimum Acceptable | What a Good Locksmith Offers |
|---|---|---|
| Key cutting | 30 days | 12 months |
| Transponder programming | 30 days | 12 months |
| Remote electronics | 90 days | 12 months |
| Key housing/shell | 30 days | 6-12 months |
| Aftermarket remote board | No warranty | 6-12 months |
What a warranty does NOT cover
Warranties cover manufacturing and programming defects. They don't cover user damage. If you drive over your key, drop it in the sea, or put it through the washing machine — that's not a warranty issue. A good locksmith will still help you (often at a reduced rate for existing customers), but it won't be free.
Dealer keys vs aftermarket keys — the warranty difference
Main dealer keys come with a manufacturer parts warranty — usually 12-24 months. But the programming labour isn't covered: if a dealer-programmed key fails, they'll replace the physical key but may charge you again for the programming time.
A good auto locksmith uses OEM-quality aftermarket keys with their own 12-month warranty covering both the key AND the programming. If the key fails, they re-programme a replacement at no charge. In practical terms, the warranty from a reputable locksmith is often better than the dealer's because it covers the labour too.
8 questions to ask before you pay
What's your warranty period on key cutting? On transponder programming? On remote electronics?
If the key stops working within the warranty, do you come back out at no charge?
Is the warranty in writing — on the invoice, email, or a warranty card?
Do you cover the call-out for warranty work or do I need to come to you?
If the key needs replacing entirely within warranty, is the replacement free or pro-rata?
Does the warranty cover the programming labour or just the physical key?
What voids the warranty — water damage, physical damage, unauthorised repairs?
How long have you been trading? Can I see your reviews?
A reputable locksmith will answer all eight questions without hesitation. Someone who dodges the warranty question or says "it just works" — keep looking.
We Stand Behind Every Key
12-month warranty on all key cutting, programming, and electronics. If something's not right, we come back — no charge, no hassle.