Introduction
This manual provides comprehensive instructions for the Keylessbest KR5TXN7 replacement key fob remote control. Please read this manual thoroughly before attempting to use or program the device to ensure correct operation and to avoid potential issues.

Image: Front view of the Keylessbest KR5TXN7 5-button key fob remote control.
Vehicle Compatibility
The Keylessbest KR5TXN7 key fob remote control is compatible with the following Infiniti vehicle models and years:
- 2020-2023 Infiniti Q50
- 2020-2022 Infiniti Q60
Important: Before purchase and programming, verify that the FCC ID (KR5TXN7) and part number (285E3-6HE6A) on the back of your original key match the specifications of this replacement key fob. The appearance of your original key should also be similar to the product shown.

Image: Visual representation of compatible Infiniti Q50 and Q60 models, highlighting the key fob's FCC ID and frequency.
Package Contents
Each Keylessbest KR5TXN7 package includes the following components:
- Key Fob Shell (x1)
- PCB Board (x1)
- Uncut Key Blade (x1)
- Lithium Battery (CR2032) (x1)
- Chip (4A) (x1)

Image: Exploded view of the key fob components, including the shell, circuit board, uncut key blade, battery, and transponder chip.
Setup and Programming
This is a brand-new, unprogrammed key fob. Programming is required for it to function with your vehicle. There are two primary methods for programming:
1. Professional Programming
It is strongly recommended to have your key fob programmed by a professional locksmith or an authorized dealership. They possess the specialized tools and expertise to correctly program the key fob to your vehicle's immobilizer system.
If your vehicle has been modified with an aftermarket electronic system, professional assistance is essential.
2. Self-Programming (If Applicable)
Some vehicles may allow for self-programming. Please check the programming instructions on the manufacturer's website: programyourfob.com. If you are unable to find specific instructions for your vehicle model or year on the website, or if programming attempts fail, professional assistance from a locksmith or dealer is necessary.
Video: This video demonstrates the general process of programming a Keylessbest car key fob, including checking vehicle information on the programming website and the need for professional assistance if self-programming is not possible or fails.
Key Blade Cutting
The included key blade is uncut. You will need to take it to a local professional locksmith for cutting to match your vehicle's ignition or door lock.
Operating the Key Fob
The Keylessbest KR5TXN7 key fob features 5 buttons for various functions:
- Remote Start: Typically indicated by a circular arrow icon. Press to remotely start your vehicle (if equipped).
- Lock: Indicated by a closed padlock icon. Press to lock all vehicle doors.
- Unlock: Indicated by an open padlock icon. Press once to unlock the driver's door, press twice to unlock all doors.
- Trunk/Hatch Release: Indicated by a car icon with an open trunk. Press and hold to open the vehicle's trunk or hatch.
- Panic: Indicated by a red speaker icon. Press and hold to activate the vehicle's alarm system.

Image: Detailed view of the key fob buttons and their corresponding functions.
Maintenance
Battery Replacement
The key fob uses one CR2032 lithium battery. If the remote's range decreases or it stops responding, the battery may need replacement. To replace the battery:
- Carefully disassemble the remote key fob, typically by prying apart the two halves using a small flat-head screwdriver or a specialized tool.
- Remove the old CR2032 battery, noting its orientation (positive (+) side up).
- Insert a new CR2032 battery with the positive (+) side facing up.
- Reassemble the key fob, ensuring all components are securely in place.
Video: This video demonstrates the steps for disassembling the key fob, replacing the battery, and reassembling it, followed by a functional test.
Troubleshooting
- Key Fob Not Responding: Ensure the battery is correctly installed and has sufficient charge. If the issue persists, the key fob may not be properly programmed to your vehicle.
- Programming Failure: If you encounter difficulties during self-programming, or if the key fob does not function after programming, it may indicate a compatibility issue or require professional programming. Contact a certified locksmith or dealership for assistance.
- Reduced Range: A weak battery is the most common cause of reduced operating range. Replace the CR2032 battery.
Specifications
| Feature | Detail |
|---|---|
| Brand | Keylessbest |
| Model Name | KR5TXN7 |
| Number of Buttons | 5 |
| FCC ID | KR5TXN7 |
| Frequency | 434MHz |
| Chip Type | 4A |
| Battery Type | 1 CR2032 (included) |
| Key Blade Type | HU100 Blade (uncut) |
| Product Dimensions | 3.15"L x 1.57"W |
| Item Weight | 1.76 ounces |
| Material | Metal, Plastic |

Image: Internal components of the key fob, including the PCB board and chip, with frequency and chip type verification.
Warranty and Support
Specific warranty details for this product are not provided in the available information. For warranty inquiries, technical support, or further assistance, please contact Keylessbest directly through their official channels or the retailer from whom the product was purchased.