CAS3 Semi-Intelligent Remote Car Key Fob for BMW Vehicles with Three Frequency Options

This CAS3 semi-intelligent remote control car key serves as a replacement or additional spare for compatible BMW models, designated by the model number HU92. The key fob is supplied as a blank, non-programmed unit that requires professional automotive locksmith services for cutting the metal keys, programming the transponder chip, and synchronising the remote functions. A critical specification is the radio frequency: the remote is available in 315MHz, 433MHz, or 868MHz variants. You must select the frequency that matches your specific BMW vehicle's factory-installed remote entry and central locking system to ensure the buttons will communicate correctly with your car after programming.

Features and Construction

The CAS3 key is designed for functionality and durability, incorporating specific materials and a multi-part design.

Material and Build

The key fob employs a hybrid construction, utilising a metal copper core for structural integrity and internal electrical contacts, housed within a moulded plastic casing that forms the external shell and button interfaces. This combination aims to provide a solid feel while protecting the internal electronics. The remote features a standard three-button layout for controlling central locking, boot release, and panic alarm functions, consistent with many BMW remote systems.

Size and Practical Fit

The product is identified by the model number HU92, which indicates its compatibility profile with a range of BMW vehicles. The key is supplied with three separate, uncut metal keys, providing multiple blanks for cutting or for keeping as spares. The remote's physical dimensions are designed to match OEM specifications for ergonomics and pocket carry. The critical technical fit is the radio frequency; choosing the correct 315MHz, 433MHz, or 868MHz option is essential for the remote to pair successfully with your vehicle's receiver.

Uses and Placement

This product addresses specific scenarios for BMW owners requiring a replacement or additional car key.

Event or Professional Use

The primary professional use case is as a replacement key ordered through automotive locksmiths, dealerships, or key specialists. It provides a cost-effective alternative to purchasing a key directly from a BMW dealer. The locksmith will cut the supplied metal blanks to match your car's lock cylinder, program the embedded transponder chip to allow the engine to start, and sync the remote buttons to operate the central locking and alarm. The availability of three frequency options allows the professional to source the correct component for a wider range of BMW models and production years.

Everyday Home Use

For the vehicle owner, this key serves as a practical spare. Once professionally cut and programmed, it functions as a fully operational remote key for daily use—locking, unlocking, and starting the car. Having a spare key mitigates the risk and high cost associated with being locked out with only one key or losing your sole key. The inclusion of three metal blanks offers value, as one can be cut for immediate use while the others are kept as future backups or given to another driver.

Benefits and Buying Value

The value of this product lies in its specification-matched compatibility and the practical advantages of having a spare key.

Reuse and Low Maintenance

The product itself is not typically "reused," but its purchase enables the continued use of your vehicle by providing a functioning key. Maintenance is minimal; the key fob may require a standard CR2032 or similar battery replacement in the future, which is a user-serviceable task. The metal and plastic construction is designed for regular handling. The primary maintenance consideration is ensuring you select the correct frequency at the time of purchase to avoid compatibility issues post-programming.

Why Choose This Product

This CAS3 key is a suitable choice for BMW owners needing a replacement or spare key who are working with a professional automotive locksmith. Its clear model identification (HU92) and the availability of three specific radio frequencies (315MHz, 433MHz, 868MHz) help ensure you get a component that is technically compatible with your car. The inclusion of three blank keys adds practical value. It is important to understand that this is a component requiring professional installation and programming; it is not a plug-and-play product and will not work straight out of the box.