Car keys by make
Fiat Key Replacement: Who Can Do It and What It Costs
Most Fiat keys, from the Punto and Panda to the 500, are transponder keys that an independent auto locksmith can cut and programme. Fiat is a Stellantis brand, and the Stellantis group committed to UK SERMI before launch. A replacement key cut and programmed costs £100 to £282 (WhoCanFixMyCar; StageMyCar), and dealers often charge more.
What kind of key does a Fiat use?
Fiat's UK range has long been built around small cars, and their keys are simple by today's standards. Most Fiats on UK roads, from the Punto and Panda to the 500, use a cut blade with a transponder chip in the head, many with remote buttons built in and some as a folding key. The chip is read by the immobiliser, so a blade cut without it will open the doors but not start the engine. Keyless entry is less common across the range than on larger brands, though newer electric and hybrid models bring newer fobs.
Can an independent auto locksmith do it?
For most Fiats, yes. Cutting the blade and programming the transponder and remote for the common models is everyday work for UK auto locksmiths, and many will repair a worn remote housing or button rather than replace the whole key. Because many Fiats are older and lower in value, the gap between a dealer price and an independent one can matter more than on a premium car. Newer Fiats built on shared Stellantis platforms may need more up-to-date access, and that is where SERMI comes in.
How does SERMI apply to Fiat?
Fiat belongs to Stellantis, along with Vauxhall, Peugeot, Citroën, Alfa Romeo, Abarth and Jeep. UK SERMI, run by RMI Standards and Certification since 1 April 2026, opened with Ford, Jaguar, Land Rover, Nissan and Toyota, and the Stellantis brands, Fiat among them, committed in early 2026, according to the scheme's own UK site. For a Fiat owner, the practical point is that an auto locksmith in the scheme should have a recognised route to Fiat's security data on newer cars. Ask to see the certificate if one is claimed.
What paperwork should you bring?
Proof of ownership comes first. Bring the V5C in your name with photo ID or, for a car bought days ago, the new keeper slip and the sale receipt. Many Fiats are a household's second car, so make sure the person meeting the locksmith is the named keeper, or has a signed note from them plus their own ID. Know your model and year: a 500 from 2010 and one from 2024 can take quite different keys. If a key was stolen, have the crime reference ready too.
How much is a Fiat key?
No Fiat-only figure appears in this site's sourced rates. A replacement key cut and programmed, for any make, costs £100 to £282; StageMyCar sets the low figure for a locksmith and WhoCanFixMyCar's 2026 bookings average sets the high one. If you have the key and only need it programmed, WhoCanFixMyCar's average is £250. A simple transponder key for an older Punto or Panda usually sits towards the bottom of the range. StageMyCar, a lower-weight source, says dealers often charge more.
Common questions
Can a locksmith replace a Fiat 500 key?
Yes, in most cases. The 500's key holds a transponder chip and remote, which an independent auto locksmith cuts and programmes to the car. Newer versions may need the locksmith to have current Stellantis access.
My Fiat key buttons have stopped working. Do I need a new key?
Not always. Try a new battery first. If the buttons or case are worn, many auto locksmiths repair or rehouse the remote and keep your existing transponder, which can avoid reprogramming.
Is Fiat part of SERMI in the UK?
Fiat is one of the Stellantis brands that committed to UK SERMI in early 2026, according to the scheme's UK site. SERMI gives independent operators in the scheme a recognised route to manufacturer security data.