Hyundai Remote Key Fob FCC ID OKA-320T – Specs & Fitment Guide

Operating at 315 MHz on the North American band, the Hyundai Remote Key Fob (FCC ID OKA-320T) provides keyless entry functionality for select mid-2000s Hyundai key & lock service vehicles. This unit is registered with the FCC under the identifier OKA-320T, which distinguishes it from other Hyundai/KIA OEM Smart Key Fob – ID47 Chip, 433.92 MHz remotes that may share a similar housing but operate on different protocols. The Hyundai Remote Key Fob (FCC ID OKA-320T) is a standalone remote — meaning it transmits lock and unlock signals to the vehicle’s body control module but does not integrate an immobilizer transponder within the same shell. For locksmiths and vehicle owners sourcing a replacement, verifying the FCC ID printed on the back of the device is the fastest way to confirm the correct part. A properly paired Hyundai Remote Key Fob (FCC ID OKA-320T) should restore full keyless entry operation without any dashboard warning indicators.

Vehicle Compatibility for the Hyundai Remote Key Fob (FCC ID OKA-320T)

Based on validated fitment data, this remote is compatible with the following Hyundai Smart Key Fob – ID8A Chip, TOY49 Blade | Key Guide model and year range:

• Hyundai Tucson — model years 2004, 2005, 2006, 2007, 2008, and 2009

The first-generation Tucson (JM platform) used this fob as its factory keyless entry remote throughout its production run. If the vehicle originally came equipped with power door locks and a remote entry system, the OKA-320T is the correct FCC-matched replacement. Owners of Tucson models from this era should note that later-generation Tucsons (2010 and beyond) moved to different remote platforms with updated FCC IDs, so cross-compatibility does not apply across generations.

315 MHz Frequency and Signal Protocol

The fob transmits at 315 MHz, the standard frequency allocation for keyless entry remotes sold in the United States and Canada during this period. Hyundai’s body control module in the 2004–2009 Tucson listens on this frequency for rolling-code signals from enrolled remotes. Rolling-code technology means the transmitted signal changes with each button press, preventing simple replay attacks. If the remote loses synchronization with the vehicle — for example, after pressing the buttons many times while out of range — a re-sync procedure may be required rather than full reprogramming.

This device should not be confused with 433 MHz variants sold in European and certain Asian markets. Installing a 433 MHz remote on a North American Tucson will result in complete non-function, regardless of whether the FCC ID housing appears identical. Always confirm the 315 MHz specification before purchasing.

Physical Identification and Inspection

The OKA-320T remote uses a compact, rounded housing typical of Hyundai remotes from this era. The FCC ID is printed or laser-etched on the rear case, usually near the battery compartment. To inspect or replace the battery, the housing splits along a seam that can be opened with a small flathead screwdriver or a coin. Inside, a single CR2032 coin-cell battery (or equivalent, depending on the specific production batch) powers the remote’s circuit board.

Common signs of a failing remote include reduced operating range, intermittent response, or complete non-function. Before assuming the remote itself has failed, battery replacement should be the first troubleshooting step. Corroded battery contacts inside the fob are another frequent issue on units that have been in service for over a decade, and cleaning the contacts with isopropyl alcohol can restore function in many cases.

Programming and Enrollment Procedures

Enrolling this remote to a 2004–2009 Hyundai Tucson typically involves an on-board programming sequence — a series of ignition-cycle and button-press steps performed at the vehicle. Some model years within this range allow self-programming by the vehicle owner, while others may require a locksmith or dealer diagnostic tool to enter programming mode. The specific steps can vary by production date and trim level, so consulting a verified programming reference for the exact model year is advisable before beginning.

Automotive locksmiths working with the OKA-320T should note that Hyundai’s on-board programming for this generation often supports enrollment of up to four remotes per vehicle. When a new remote is programmed, previously enrolled units typically remain active unless a full remote-erase procedure is performed first. This is an important consideration when a customer has lost one remote and wants to ensure a found or stolen unit cannot access the vehicle — in that scenario, all remotes should be erased and only the customer’s current units re-enrolled.

OEM vs. Aftermarket Considerations

Original equipment remotes carrying the OKA-320T FCC ID are manufactured to Hyundai Motor Company specifications and use the exact rolling-code algorithm expected by the Tucson’s receiver module. Aftermarket clones are available at lower price points, and many of them reference the same FCC ID on their packaging. Quality varies significantly among aftermarket units: some perform identically to the OEM part, while others may exhibit reduced range, inconsistent button feel, or shorter battery life due to lower-grade components.

For locksmiths advising customers, the practical recommendation is to verify that any aftermarket remote actually transmits at 315 MHz and supports the correct rolling-code protocol before attempting enrollment. A remote that pairs successfully but drops out of sync frequently is a hallmark of a protocol mismatch or inferior oscillator stability in the transmitter circuit.

When to Contact a Locksmith

Vehicle owners who are uncomfortable performing on-board programming themselves, or who encounter a Tucson that does not respond to the standard programming sequence, should contact an automotive locksmith experienced with mid-2000s Hyundai vehicles. Diagnostic scan tools can confirm whether the body control module is receiving the remote’s signal and whether the rolling-code counter has fallen out of expected range. A qualified technician can also diagnose whether the issue lies with the fob, the vehicle’s antenna, or the body control module itself — saving the owner from purchasing unnecessary replacement parts.