BMW CAS4 FEM Smart Key HUF5663 – PCF7953P HITAG Pro 434MHz HU100R 2009+
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📋 Remote: HUF 5663 | Chip: PCF7953P HITAG Pro | System: CAS4 / FEM | Blade: HU100R | From: 2009+
PCF7953P HITAG Pro 434MHz ASK HU100R Blade 4 Buttons CAS4 / FEM HUF 5663 Battery Not Included
Aftermarket BMW compatible smart key for CAS4/FEM system vehicles (2009+), featuring a PCF7953P HITAG Pro chip, 434MHz ASK frequency, 4 buttons and HU100R blade. Remote reference: HUF 5663. Battery not included. HITAG Pro diagnostic programming by a qualified locksmith is required — this is one of BMW's most advanced security systems.
🔋 Battery Not Included: This key does not come with a battery. Please purchase a compatible coin battery separately before use. Battery access requires a tool.
🔍 CAS4 / FEM System — What This Means: BMW uses different immobiliser systems across generations. CAS4 (Car Access System 4) and FEM (Front Electronic Module) are BMW's most advanced access systems used in post-2009 models. Confirm your BMW uses CAS4 or FEM before purchasing — earlier BMWs use CAS3+ or CAS3, which require a different key. Your locksmith can identify your system via the VIN or diagnostic scan.
💾 PCF7953P HITAG Pro — BMW's Highest Security Chip: This key uses the PCF7953P HITAG Pro transponder — BMW's most advanced security chip, featuring full AES encryption. This is significantly more complex to program than earlier BMW chips. Your locksmith must have specialist BMW CAS4/FEM diagnostic equipment (such as Autel IM608 Pro, Launch X431, VVDI2, or BMW ISTA-P) that specifically supports HITAG Pro programming. Please confirm compatibility before purchasing.
⚠️ Specialist Programming Required: Programming this key requires specialist BMW CAS4/FEM diagnostic equipment that supports HITAG Pro. It cannot be self-programmed. Not all general locksmiths have the equipment for this — please confirm your locksmith has CAS4/FEM HITAG Pro capability before purchasing.
Key Features
Complete Smart Key
Full key with all electronics inside — not a shell or casing only
434MHz ASK
434MHz ASK frequency matching BMW CAS4/FEM factory specification
HITAG Pro
PCF7953P HITAG Pro — BMW's highest security AES transponder
HU100R Blade
HU100R BMW reversed blade — confirm your blade profile before ordering
4 Buttons
4-button smart key — lock, unlock, boot and panic
CAS4 / FEM
BMW's most advanced access system — 2009+ models with CAS4 or FEM
Vehicle Compatibility
| System | From Year | Remote Ref | Chip | Frequency | Blade |
|---|---|---|---|---|---|
| BMW CAS4 / FEM | 2009+ | HUF 5663 | PCF7953P HITAG Pro | 434MHz ASK | HU100R |
Programming Requirements
🔧 Specialist CAS4/FEM HITAG Pro Programming Required — This BMW key uses the PCF7953P HITAG Pro chip and requires programming by a specialist automotive locksmith or mechanic with BMW CAS4/FEM compatible diagnostic equipment that supports HITAG Pro (e.g., Autel IM608 Pro, Launch X431 Pro, VVDI2 or BMW ISTA-P). Standard diagnostic tools are unlikely to be sufficient. Please confirm your locksmith has the correct specialist equipment before purchasing.
Technical Specifications
| Manufacturer Compatibility | BMW (Aftermarket) |
| Vehicle System | BMW CAS4 / FEM (2009+) |
| Remote Reference | HUF 5663 |
| Type | Aftermarket Compatible Smart Key |
| Chip | PCF7953P HITAG Pro |
| Frequency | 434MHz ASK |
| Buttons | 4 |
| Blade | HU100R |
| Programming Method | Specialist Diagnostic Only (CAS4/FEM HITAG Pro tool required) |
| Battery Included | No — purchase separately |
| Battery Access | Tool Required |
| Logo Included | No |
Before You Buy – Important Information
- This is a complete smart key with all electronics included — not a shell only
- Keys are not supplied with logos
- Battery is NOT included — please purchase a compatible coin battery separately
- Confirm your BMW uses a CAS4 or FEM immobiliser system — your locksmith can verify via VIN or diagnostic scan
- Confirm your key uses the HU100R blade (reversed profile) before ordering
- Your locksmith must have specialist CAS4/FEM equipment with HITAG Pro support — standard locksmith tools are unlikely to be sufficient
- Remote reference is HUF 5663 — verify this matches your current key if possible
- Programming must be performed by a qualified automotive locksmith or mechanic with specialist BMW equipment
- This key cannot be self-programmed
Disclaimer: This product is an aftermarket compatible replacement key, distributed as a substitute for the original manufacturer's product. It is not produced by, authorised, endorsed, or approved by BMW Group. The word "BMW" and all system names are used solely to indicate vehicle compatibility.