Guide · Ford

Ford B-Max Key Replacement Guide

Last updated: August 2026 · Verified OEM part numbers

Quick answer: The Ford B-Max (various model years) uses the 3M5T 15K601 DB Aftermarket Remote Key 315MHz 83 Chip 3 Button FO21 for Ford Focus Fiesta (SKU fo21-focus-315MHz) — verified against OEM part numbers. See the full compatibility table below.

Which Ford B-Max key fits your vehicle?

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Compatible keys for Ford B-Max

Years	Key
—	3M5T 15K601 DB Aftermarket Remote Key 315MHz 83 Chip 3 Button FO21 for Ford Focus Fiesta SKU: fo21-focus-315MHz
—	3M5T 15K601 DB Aftermarket Remote Key 315MHz 83 Chip 3 Button HU101 for Ford Focus Fiesta SKU: HU101-focus-315MHz
—	3M5T 15K601 DB 434MHz 83 Chip HU101 Flip Remote Key for Ford Focus Fiesta SKU: HU101-focus-434MHz
—	3M5T 15K601 DB Aftermarket Remote Key 434MHz 83 Chip 3 Button FO21 for Ford Focus Fiesta SKU: fo21-focus-434MHz
—	3M5T 15K601 DB Aftermarket Remote Key 315MHz 83 Chip 3 Button HU101 for Ford Focus Fiesta SKU: HU101-focus-315MHz
—	3M5T 15K601 DB 434MHz 83 Chip HU101 Flip Remote Key for Ford Focus Fiesta SKU: HU101-focus-434MHz
—	3M5T 15K601 DB Aftermarket Remote Key 434MHz 83 Chip 3 Button FO21 for Ford Focus Fiesta SKU: fo21-focus-434MHz
—	3M5T 15K601 DB Aftermarket Remote Key 315MHz 83 Chip 3 Button FO21 for Ford Focus Fiesta SKU: fo21-focus-315MHz
—	3M5T 15K601 AC 5WK48791 OEM Board Remote Key 434MHz 3 Button FO21 for Ford Mondeo Fusion SKU: PCK-FD-2085
—	3M5T 15K601 AC 5WK48791 OEM Board Remote Key 434MHz 3 Button HU101 for Ford Mondeo Fusion SKU: PCK-FD-2086

Before you order

Match the year range — Ford changed key systems across model years. Check your registration year.
Check your current key — the OEM number printed on your key matches the table above.
Programming — smart keys need a compatible programmer (Xhorse, VVDI, Autel). We can advise which one works for each key.

Frequently asked questions

Which key fits my Ford B-Max?

The Ford B-Max (various model years) uses the 3M5T 15K601 DB Aftermarket Remote Key 315MHz 83 Chip 3 Button FO21 for Ford Focus Fiesta (SKU fo21-focus-315MHz). Check the table above for all compatible options, verified against OEM part numbers.

Do you supply Ford B-Max keys wholesale?

Yes. We supply locksmiths and key distributors at wholesale prices with MOQ from 5 units. Message us on WhatsApp for today's price list.

Can a Ford B-Max key be programmed without the dealer?

In most cases yes, using tools like Xhorse, VVDI or Autel. We can advise the right programmer for each key SKU.

Ready to order a Ford B-Max key?