BMW CAS4 EWS4 Key Replacement Guide

Last updated: September 2026 · Verified against OEM part numbers

Compatible keys for BMW CAS4 EWS4

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

What frequency is the BMW CAS4 EWS4 key?

The BMW CAS4 EWS4 key operates on 868 MHz. Frequency is fixed in the key hardware and cannot be reprogrammed — a key bought on the wrong frequency will not lock, unlock or start the car.

Which key fits my BMW CAS4 EWS4?

The BMW CAS4 EWS4 (various model years) uses the OEM Board YG0HUF5661 868MHz 7953PC1100 Chip Smart Key for BMW CAS4 (EWS4) (SKU 原厂板 F卡 868). Check the table above for all compatible options, verified against OEM part numbers.

Do you supply BMW CAS4 EWS4 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 EWS4 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.

Related: All BMW keys · All guides · Key Finder

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