Lexus Smart Keyless Entry Remote Fob HYQ14FBA (2013-2020 ES/GS)
Updated June 21, 2026
This is an OEM Lexus proximity smart key fob (FCC ID HYQ14FBA) designed for push-button start vehicles. It allows keyless entry and engine start via radio frequency communication with the vehicle's immobilizer and body control modules. Commonly identified by the "G" marking on the circuit board and part numbers 89904-06170 or 281451-0020, this fob is a direct replacement for factory-equipped systems.
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Function and Operation
The HYQ14FBA smart key operates on a 315 MHz frequency and uses passive proximity detection to lock or unlock doors and enable push-button engine start. It features four buttons: lock, unlock, trunk release, and panic. When the fob is within range (typically 1–2 meters), the vehicle detects its presence and allows the driver to start the engine without inserting a key. The fob also contains a physical emergency key blade that can be used to manually unlock the driver's door if the battery is depleted.
Vehicle Compatibility
This fob is specifically designed for the following Lexus models: ES300h (2013–2018), ES350 (2013–2020), GS200t (2016–2017), GS300 (2018–2019), GS350 (2013–2020), and GS450h (2013–2018). It may also be compatible with certain Toyota models such as the Camry and RAV4 of similar years, but it will not work on Lexus IS or RC series vehicles. Always verify FCC ID HYQ14FBA and the "G" marking on the circuit board before purchase.
Programming and Installation
The fob is typically sold as "virgin" (unlocked) or in used condition. A virgin fob can be programmed directly to the vehicle using a dealer scan tool or aftermarket programming device. Used fobs must first be erased and then reprogrammed, which generally requires a Lexus dealership or an experienced automotive locksmith. Some sellers offer DIY programming kits that include a smartphone app and a programming tool, but professional assistance is recommended for reliable results. If the fob does not include a cut emergency key, a locksmith can cut one from the existing key code.
Common Issues and Diagnosis
The most frequent problems with this fob include a dead internal battery (replaceable CR2032), worn or stuck buttons, water damage, and loss of programming after a vehicle battery change. Symptoms include the vehicle not detecting the fob ("Key Not Detected" message), intermittent locking/unlocking, or the fob not working at all. Diagnosis starts with replacing the battery and checking for physical damage. If the fob still fails, it may need to be reprogrammed or replaced. A used fob that was previously paired to another vehicle will not work until it is erased and reprogrammed.
