It appears there might be some confusion regarding the 2007 Acura Rdx Key Fob, specifically concerning whether the blade contains a chip. Let’s clarify the components and functionality of your key.
Your Acura RDX key is actually composed of two distinct and crucial parts working in tandem:
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The Remote Transmitter: This is the battery-powered component, often referred to as the “clicker,” responsible for the convenience of remotely locking and unlocking your vehicle’s doors. This part can be detached from the main key body. You have the option to replace or add extra remote transmitters, even sourcing them from places like eBay. It’s important to note that while you can program up to seven remote transmitters, they must all be programmed together in one session. This system solely controls the door locks and is completely separate from the engine ignition system.
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The Ignition Immobilizer: This component is essential for starting your Acura RDX. It comprises the mechanical key blade itself and an integrated transponder (the chip). This unit is physically screwed into the main body of the key. To use a replacement key, like one purchased from eBay, for ignition, you need to detach this blade/transponder unit from the replacement key and swap it with your original, already programmed blade/transponder unit. This is precisely why using the blade from your original key makes the eBay key function correctly for starting the engine.
If you’ve lost your original blade/transponder unit, simply replacing the remote transmitter portion will not suffice for starting your car. In such cases, all keys, both original and any replacements, must be re-registered through a Honda dealership. They utilize the Honda Datalink System to reprogram the immobilizer transponders. This process is specifically for enabling engine start functionality and is independent of the remote door lock operation.
Lastly, it’s worth noting that even the valet key for your 2007 Acura RDX includes a transponder and would also require re-registration if it needs to be used for ignition after a key system reset or loss of the original transponder.
