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Product Description
The 3 Buttons 6490A3 0536 Model 433MHz Flip Key is a premium aftermarket flip key designed specifically for the Citroen C5. Featuring a compact foldable design, this key solves the problem of bulky traditional keys and is easy to carry in a pocket or purse. It is equipped with a 433MHz frequency and multiple chip options including PCF7961A, HITAG 2, and 46 CHIP, ensuring seamless compatibility with the Citroen C5’s anti-theft and control systems. The three-button layout includes Lock, Unlock, and Trunk, covering all the essential functions for daily use. As a dedicated replacement key, it offers the same performance as the original Citroen key at a more affordable price. The flip key’s durable HU83 key blade and sturdy shell can withstand frequent folding and daily wear, making it an ideal choice for Citroen C5 owners in need of a reliable spare or replacement key.

Parameter | Details |
Model | 0536 |
P/N | 6490A3 |
Key Blade Type | HU83 |
Chip Type | PCF7961A / HITAG 2 / 46 CHIP |
Frequency | 433MHz |
Button Functions | Lock, Unlock, Trunk |
Battery Type | CR1620 |
Production Type | Aftermarket |
Compatible Models | Citroen C5 |
The foldable flip design reduces the key’s size significantly, making it easy to carry without taking up much space. The flip mechanism is smooth and durable, ensuring long-term use without jamming.
With three chip options including PCF7961A, HITAG 2, and 46 CHIP, the key can match different production batches of the Citroen C5, maximizing compatibility for users.
The independent Trunk button allows for quick and convenient opening of the vehicle’s trunk without needing to unlock the entire car, improving daily usage efficiency.
The key uses a CR1620 battery that offers a long service life. Its low power consumption design ensures that the key can maintain stable performance for an extended period.
The Citroen C5 flip key operates through a combination of 433MHz radio frequency transmission and chip identification technology. The key’s internal chip stores a unique encrypted code that is paired with the Citroen C5’s onboard anti-theft system. When you unfold the key and press a button, the internal circuit activates the chip to generate a control signal containing the encrypted code. This signal is then transmitted as a 433MHz radio wave. The vehicle’s receiver captures the signal and sends it to the anti-theft control module for code verification. If the code is authenticated, the control module executes the corresponding command, such as unlocking the doors or opening the trunk. The flip key’s working principle emphasizes high security, as the encrypted chip code prevents unauthorized replication and use. Unlike the ASK modulation used in the Cadillac XT4 key, this flip key uses a more secure frequency hopping technology to enhance signal anti-interference and anti-theft capabilities.
Before using the key, you must have it programmed by a local car locksmith. Programming is essential to synchronize the key’s chip code with your Citroen C5’s system.
Ensure that the key’s P/N (6490A3) and model (0536) are exactly the same as your original key. If you are unsure, send a photo of your original key to customer service for confirmation.
The initialization method for the Citroen C5 remote control is as follows: Turn off the ignition switch → Turn the key to the “M” position of the ignition switch → Immediately press and hold the “Lock” button for more than ten seconds → Close and remove the key. All remote control functions will then be activated.
If the flip key fails to pop out, first manually buckle the key out to a half-folded position. Locate the small pin protruding from the metal root of the key and clamp it with pliers to adjust the flip mechanism. If this issue occurs frequently, it is best to have the key repaired at a professional car key distribution store.
Avoid dropping the key or exposing it to heavy impact, as this can damage the flip mechanism and internal chip.
Replace the CR1620 battery in a timely manner when the key’s signal becomes weak to prevent sudden key failure.
Can I program this flip key by myself at home?
Self-programming is not recommended. The Citroen C5’s anti-theft system requires professional programming equipment to complete the code matching process. A professional locksmith has the necessary tools and experience to ensure successful programming.
What chip type should I choose for my Citroen C5?
The chip type depends on your vehicle’s production batch. You can check the chip type of your original key or consult a local Citroen service center to determine the correct chip option for your vehicle.
What should I do if the flip mechanism jams frequently?
Frequent jamming may be caused by loose pins or worn internal components. You can try adjusting the pin as per the usage tips, but if the problem persists, it is recommended to have the key repaired or replaced to avoid affecting normal use.
Is this flip key compatible with other Citroen models?
No, this flip key is exclusively designed for the Citroen C5. It is not compatible with other Citroen models such as the C3, C4, or C6.
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