Guide · BMW

BMW CAS4 Key Replacement Guide

Last updated: August 2026 · Verified OEM part numbers

Quick answer: The BMW CAS4 (various model years) uses the HUF5663 433.92MHz 7945 Chip 3 Button Smart Key for BMW CAS4 — verified against OEM part numbers. See the full compatibility table below.

Which BMW CAS4 key fits your vehicle?

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Compatible keys for BMW CAS4

Years	Key
—	HUF5663 433.92MHz 7945 Chip 3 Button Smart Key for BMW CAS4
—	HUF5663 433.92MHz 7945 Chip 4 Button Smart Key for BMW CAS4
—	HUF5663 433.92MHz 7945 Chip 3+Panic Button Smart Key for BMW CAS4
—	HUF5663 433MHz 7953 Chip 3+Panic Button Silver Smart Key for BMW CAS4 SKU: PCK-BM-2178
—	HUF5663 433MHz 7953 Chip 3+Panic Button Black Smart Key for BMW CAS4 SKU: PCK-BM-2181
—	HUF5663 433MHz 7953 Chip 3+Panic Button Blue Smart Key for BMW CAS4 SKU: PCK-BM-2184
—	HUF5663 433MHz 7953 Chip 3+Panic Button Red Smart Key for BMW CAS4 SKU: PCK-BM-2187
—	South Korea Version HUF5768 433MHz 7945 Chip Silver Smart Key for BMW CAS4 SKU: PCK-BM-2152
—	HUF5663 433MHz 7953 Chip 3 Button Red Smart Key for BMW CAS4 SKU: PCK-BM-2125
—	HUF5663 433MHz 7953 Chip 4 Button Red Smart Key for BMW CAS4 SKU: PCK-BM-2159
—	HUF5663 433MHz 7953 Chip 3 Button Blue Smart Key for BMW CAS4 SKU: PCK-BM-2122
—	HUF5663 433MHz 7953 Chip 4 Button Blue Smart Key for BMW CAS4 SKU: PCK-BM-2156
—	HUF5663 433MHz 7953 Chip 4 Button Black Smart Key for BMW CAS4 SKU: PCK-BM-2153
—	HUF5663 433MHz 7953 Chip 3 Button Silver Smart Key for BMW CAS4 SKU: PCK-BM-2116
—	HUF5663 433MHz 7953 Chip 4 Button Silver Smart Key for BMW CAS4 SKU: PCK-BM-2148
—	HUF5663 433MHz 7953 Chip 3 Button Black Smart Key for BMW CAS4 SKU: PCK-BM-2119

Before you order

Match the year range — BMW 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 BMW CAS4?

The BMW CAS4 (various model years) uses the HUF5663 433.92MHz 7945 Chip 3 Button Smart Key for BMW CAS4. Check the table above for all compatible options, verified against OEM part numbers.

Do you supply BMW CAS4 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 BMW CAS4 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 BMW CAS4 key?