BMW CAS3 semi-intelligent remote car key replacement fob, three-button metal and plastic construction, compatible with 315MHz, 433MHz and 868MHz frequency models, includes one key.
BMW CAS3 semi-intelligent remote car key replacement fob, three-button metal and plastic construction, compatible with 315MHz, 433MHz and 868MHz frequency models, includes one key.
BMW CAS3 Semi-Intelligent Remote Car Key Replacement for 315MHz, 433MHz & 868MHz Models
This CAS3 semi-intelligent remote key fob serves as a direct replacement part for compatible BMW vehicles. It is designed for owners who need a new or spare key, matching the specific technical requirements of the CAS3 security and locking system. The key is built from a stated combination of metal copper and plastic, and its functionality is defined as 'semi-intelligent,' indicating it handles standard remote commands. Crucially, it is confirmed to support the 315MHz, 433MHz, and 868MHz radio frequencies, covering a range of BMW models. As a replacement part with the HU92 model number, it provides a focused solution, arriving as a single unit ready for professional servicing to sync with your car.
Features and Construction
The key is defined by its technical compatibility and material build, offering a practical replacement based on the manufacturer's original specifications.
Material and Build
The construction uses metal copper and plastic. The metal copper component likely forms the core structural element of the key blade and internal electronic housing, providing necessary rigidity. The plastic material moulds the outer casing, creating the familiar fob shape that houses the three buttons and protects the internal circuitry. This material combination aims to deliver a balance between the durability needed for a daily-use item and the precise moulding required for ergonomic button placement and brand styling.
Size and Practical Fit
While exact dimensions are not provided, the key is described as having a three-button layout, which is a standard configuration for BMW remote fobs of this era. Its 'semi-intelligent' designation suggests it replicates the form and core function of the original equipment, designed to fit comfortably in hand and pocket. The key is supplied as a single unit, confirming it is a complete fob assembly rather than just internal components, requiring subsequent cutting and programming to become vehicle-specific.
Uses and Placement
This product has a single, clear primary use case: to replace a lost, damaged, or non-functioning original key for a compatible BMW vehicle.
Event or Professional Use
The key's sole purpose is for vehicle access and operation. Its primary 'event' is the professional programming and cutting session conducted by a qualified automotive locksmith or BMW dealership technician. This process synchronises the key's electronic transponder with the car's CAS3 immobiliser system and cuts the metal blade to match the door and ignition locks. Successfully programmed, it then functions identically to the original for daily unlocking, locking, and boot release.
Everyday Home Use
Once programmed, this key transitions into an essential everyday item. It serves as a primary or spare key for starting your BMW, locking and unlocking the doors remotely, and potentially activating the alarm system. The robust metal and plastic construction is intended to withstand the physical demands of being carried and used regularly. Having a fully functional spare key also provides practical security and convenience, preventing lockouts and offering a backup should the primary key be misplaced.
Benefits and Buying Value
The value of this product lies in its specific compatibility and role as a complete replacement unit, avoiding the need for more complex vehicle security modifications.
Reuse and Low Maintenance
As a physical key fob, it is inherently reusable. There are no consumable parts; the value is in the long-term service it provides once programmed. Maintenance is minimal, typically limited to occasional battery replacement for the remote circuit (battery type not specified in source) and general care to avoid physical damage. The built quality using metal and plastic aims to support this longevity under normal use conditions, making it a one-time purchase for ongoing access.
Why Choose This Product
This key is chosen for its confirmed technical specifications. The critical decision factors are the stated compatibility with BMW CAS3 systems, the support for the 315MHz, 433MHz, and 868MHz frequencies, and the HU92 part number match. It provides a straightforward replacement path. Choosing this specific part ensures you are getting a component designed to the correct electrical and physical protocol for your vehicle, which is essential for successful programming and reliable operation, compared to generic or incorrectly specified alternatives.
