Hyundai 4-Button Remote Key Fob (FCC ID OSLOKA-423T) – Key Details

Programming a Hyundai 4-Button Remote Key Fob (FCC ID OSLOKA-423T) requires access to professional-grade diagnostic equipment capable of communicating with the Hyundai body control module over OBD-II. The enrollment sequence begins by placing the vehicle in programming mode through a specific ignition cycle or scan tool command, then initiating the RF handshake between the module and the remote. Locksmiths registering this device must confirm the existing remote count in the BCM before adding a new unit, as overwriting existing slots can deactivate previously paired remotes. A Hyundai 4-Button Remote Key Fob (FCC ID OSLOKA-423T) enrolled correctly will trigger audible lock/unlock confirmation from the vehicle and respond within the expected operating range. Replacement units of this fob are widely available in both OEM and aftermarket configurations, and the Hyundai 4-Button Remote Key Fob (FCC ID OSLOKA-423T) remains one of the more commonly serviced Hyundai remotes in the locksmith trade.

Hyundai 4-Button Remote Key Fob (FCC ID OSLOKA-423T) Specifications

The remote operates at a frequency of 315 MHz, which is the standard RF band used across many Hyundai models sold in the North American market. Its four-button layout provides Lock, Unlock, Panic, and Trunk Release functions — a configuration that covers all the primary keyless entry operations Hyundai Elantra owners rely on daily. The FCC ID OSLOKA-423T is registered with the Federal Communications Commission and can be verified through the FCC’s public equipment authorization database, which is a useful step for locksmiths confirming that an aftermarket unit is a legitimate match before programming.

The housing of this fob follows Hyundai’s standard mid-2010s remote shell design, with a rounded body and rubberized button pad. Battery access is typically through a rear cover that pries apart along a seam, revealing a standard CR2032 coin cell. Replacing the battery does not affect the remote’s programmed pairing with the vehicle; the stored rolling code data is retained in non-volatile memory inside the remote’s circuit board.

Vehicle Compatibility

Based on validated fitment data, this remote is confirmed compatible with the Hyundai Elantra model years 2015 through 2020. This covers both the fifth-generation Elantra (2015–2016 model years) and the sixth-generation Elantra (2017–2020), indicating that Hyundai carried forward the same keyless entry architecture across a generational platform change — at least for the standard remote entry system paired with a traditional ignition key.

Automotive locksmiths should note that while the FCC ID confirms RF compatibility, some trim-level variations within the Elantra lineup may have shipped with proximity-based smart key systems instead of this traditional remote. Verifying the customer’s existing remote or checking the vehicle’s BCM configuration before ordering a replacement unit avoids mismatches.

Programming Procedures and Tool Requirements

Enrollment of the OSLOKA-423T remote into a Hyundai Elantra typically involves a diagnostic scan tool with Hyundai-specific software support. Tools such as the Autel IM608, Smart Pro, and similar advanced key programmers include Hyundai remote registration functions. The general workflow involves connecting to the vehicle’s OBD-II port, navigating to the immobilizer or keyless entry module, selecting the remote registration function, and following on-screen prompts to place the new fob into pairing mode.

Some technicians report success using a manual on-board programming method for this generation of Elantra remotes, which involves a timed sequence of ignition on/off cycles followed by pressing a button on the remote within a defined window. However, the availability and reliability of manual methods can vary by model year and production date. When in doubt, scan-tool-based programming offers the most consistent results and provides diagnostic confirmation that the remote has been accepted by the BCM.

After programming, a functional test should confirm all four buttons respond correctly: doors should lock and unlock with audible feedback, the trunk release should actuate the latch, and the panic alarm should sound the horn and flash the lights. Range testing from approximately 30 to 50 feet away from the vehicle helps verify proper RF output from the newly enrolled unit.

OEM vs. Aftermarket Considerations

The OSLOKA-423T is available in genuine Hyundai OEM form as well as from multiple aftermarket key remote manufacturers. OEM units carry a higher price point but guarantee factory-matched RF characteristics and button feel. Aftermarket alternatives often cost significantly less and, when sourced from reputable manufacturers, program identically to the original. The circuit board and RF transmitter inside aftermarket versions must still comply with the FCC ID’s specifications to be legal for sale in the United States, which provides a baseline of signal quality assurance.

For vehicle owners, the choice between OEM and aftermarket often comes down to budget. A locksmith can program either type using the same procedure, so the programming cost does not change based on which version of the fob is supplied. Owners should be aware that some dealerships may decline to program third-party remotes, making a mobile locksmith a practical alternative for aftermarket unit enrollment.

When to Contact a Locksmith

Vehicle owners needing a replacement remote for their 2015–2020 Hyundai Elantra should consider contacting a qualified automotive locksmith rather than defaulting to a dealership visit. Mobile locksmiths equipped with the appropriate scan tools can program the OSLOKA-423T on-site, often at a lower total cost than dealership service departments charge. This is especially convenient for owners who have lost their only remote and need service at their vehicle’s location rather than arranging a tow to a dealer.

Locksmiths specializing in Hyundai vehicles will also be able to inspect the existing key and remote system, verify which keyless entry configuration the specific Elantra trim uses, and recommend the correct replacement product before any parts are ordered — eliminating the trial-and-error that sometimes occurs when owners attempt to source remotes independently online.