BMW key fobs contain sophisticated microchips that must be programmed to your vehicle's security system.

Read my !0 common questions on BMW programming costs.

Here's the full breakdown across every viable option, from cheapest to most expensive.

The most popular opion, according to recent research, is Independent Clone.

This are the best options and what the majority of BMW owners choose:

• Used BDC (eBay, Go-Parts, salvage): $100–$400, it must be an exact part number match.
• Cloning service (mail-in): $150–$400 depending on provider and generation.
• FEM / BDC1 (F-series): $150–$300, this is simpler, discrete EEPROMs
• BDC2 / BDC3 (G-series): $250–$600 — more locked down, harder
• Independent shop labor (swap + verify): $150–$300

Chassis-to-Module Quick Reference

Download the BMW Key Guide PDF