Keymall Lexus Smart Key Fob Replacement — 4-Button HYQ14ACX (314.3 MHz) with Battery & Uncut Blade

Keymall's 4‑button smart key fob is an aftermarket replacement remote that fits specified Lexus models using the HYQ14ACX (271451-5290 GNE) board and operates at 314.3 MHz.

This Keymall replacement remote is built to match the form and function of factory keyless entry transmitters for many Lexus RX, GX, LX and CT series vehicles from roughly 2008–2016. It ships as a complete remote with battery, circuit board, and an uncut key blade so a locksmith can cut and program it to your vehicle. Because this is an aftermarket unit, it does not carry Lexus logos or factory back stamping; confirm your original remote's board code and frequency before ordering to ensure compatibility.

How do I confirm this remote matches my Lexus?

Before purchasing, compare the identifiers on your existing remote. This Keymall unit uses the GNE board marked 5290 and the FCC ID HYQ14ACX; the operating frequency is 314.3 MHz. Visual and code matches prevent buying the wrong key.

• Check the board for letters "GNE" or the numbers "5290."
• Verify the FCC ID HYQ14ACX on your original remote if visible.
• Confirm you need a 4‑button remote (Lock, Unlock, Trunk, Panic).
• Match the key blade shape and slot style to the included blank.

What does the package include and what needs doing after delivery?

The remote arrives as a full unit ready for a professional cut and programming; it includes the battery and internal electronics so you won’t need to transfer parts from an old key. Dealers often limit programming to genuine OEM remotes, so a qualified locksmith is usually the best choice for cutting and programming.

• Included: one Keymall key fob with uncut key blank and CR2032 battery installed.
• Not included: dealership logo, factory back stamping or factory programming service.
• Required: key cutting and vehicle programming by a locksmith or compatible programmer.
• Tip: confirm programming compatibility before cutting the blade to avoid wasted cutting fees.

Which Lexus models and years are supported by this remote?

This replacement is compatible with a range of Lexus models that used the HYQ14ACX/GNE board layout. Compatibility lists are a guide because the same model/year can have multiple remote types—always verify the board and button layout on your original remote.

• RX350: 2009–2015
• RX450 / RX450h: 2010–2015
• GX460: 2010–2016
• LX570: 2008, 2010–2013
• CT200h: 2011, 2013–2016

What technical details and limitations should I be aware of?

Keymall's remote follows the referenced part and board numbers and uses a CR2032 cell. Because it’s an aftermarket product, it intentionally omits OEM branding and back‑plate markings. Verify part numbers and ensure your vehicle accepts aftermarket programming before committing.

• Specification highlights: FCC ID HYQ14ACX, Board 271451‑5290 GNE, Part No. 89904‑48191, Frequency 314.3 MHz.
• Buttons: Lock, Unlock, Trunk, Panic (4 buttons).
• Battery: CR2032 included; cutting and programming required by a locksmith.
• Aftermarket note: no Lexus emblem or factory part number on the backside.

Who this is for: This Keymall remote is aimed at Lexus owners who need a direct aftermarket replacement for a lost, damaged, or nonfunctional factory key fob and who can access a locksmith or independent programmer for cutting and pairing. It’s ideal if your original transmitter shows the GNE/5290 board or HYQ14ACX identifiers and you want a full remote that includes battery and internal electronics without OEM branding.