How Much Does a BMW Key Replacement Cost? (2026 UK Prices)

BMW key replacement is one of the most-searched locksmith topics in the UK, and for good reason: main-dealer prices for a new BMW smart key can comfortably exceed £450 once the diagnostic fee, programming labour and admin charges are added on. Independent auto locksmiths are typically 30–60% cheaper for identical OEM-quality work.

CAS3 keys (older 1, 3, 5 Series)

BMWs from approximately 2005–2012 use the CAS3 platform. Replacement keys for these vehicles typically cost £180–£250 fitted on-site.

FEM/BDC smart keys (newer 1, 3, 5, X-Series)

Most BMWs from 2013 onwards use the FEM or BDC smart-key platform. Replacement smart keys for these typically cost £250–£350 fitted on-site.

Display Key (7 Series, 5 Series G30)

BMW's premium Display Key — the LCD-screen smart key — replaces from around £400 due to the screen hardware itself.

Dealer vs locksmith

A BMW main dealer in London will typically quote £500–£700 for an FEM/BDC key replacement including tow and admin. An independent mobile auto locksmith with dealer-level kit can do the identical job for £280–£350 — at your home or office.

Get a quote

Call us on +44 7440 766267 with your BMW's registration and we'll confirm the exact price in under a minute.