Acura ILX / RLX / TLX 4-Button Smart Key – KR5V1X – 315 MHz – ID47

Acura ILX / RLX / TLX 4-Button Smart Key – KR5V1X – 315 MHz – ID47

Aftermarket replacement smart key for select Acura ILX, RLX, and TLX vehicles equipped with the KR5V1X proximity and push-to-start system.

This 4-button smart key operates in the North American 315 MHz frequency range and features an ID47 / HITAG3-compatible transponder system. The remote provides Lock, Unlock, Trunk Release, and Panic functions.

This KR5V1X family is available under multiple Acura OEM part-number and memory configurations. Always verify the original FCC ID, frequency, button configuration, OEM part number, memory configuration, and vehicle application before ordering or programming.

Key Features

• FCC ID: KR5V1X
• Frequency: 315 MHz
• Nominal Frequency Specification: 313.8 MHz
• Transponder Chip: ID47
• Chip Configuration: PCF7953X-compatible aftermarket
• Transponder Technology: HITAG3-compatible
• Button Count: 4
• Button Layout: 3+1
• Button Functions: Lock / Unlock / Trunk Release / Panic
• Key Type: Smart Key
• Proximity / Keyless Go: Yes
• Push-to-Start: Yes
• Battery: CR2032
• Emergency Key Profile: HO01
• Emergency Key Included: Yes
• Manufacturer Type: Aftermarket
• Condition: New

Product Information

• Compatible Make: Acura
• Application Type: Smart Remote / Proximity / Immobilizer
• Vehicle System: Proximity / Push-to-Start
• Transponder: ID47 / PCF7953X-compatible aftermarket
• Transponder Technology: HITAG3-compatible
• Power Source: Battery Powered
• Battery Size: CR2032
• Emergency Key Profile: HO01
• Emergency Key Included: Yes
• Programming: Dealer / Locksmith Programming Required
• Remote Features: Keyless Entry, Proximity Entry, Power Lock, Trunk Release, Panic Mode

The replacement family includes three important Acura part-number configurations:

• 72147-TZ5-A01 = Driver 1 / Memory 1.
• 72147-TZ5-A11 = Driver 2 / Memory 2.

OEM Cross-Reference:
72147-TX6-A22 / 72147-TZ3-A01 / 72147-TZ3-A11

Vehicle Compatibility

Acura

• ILX: 2016–2018
• RLX: 2016–2020
• TLX: 2015–2017

Important: KR5V1X is used across several Acura and Honda smart-key configurations. FCC ID alone is not sufficient to determine compatibility. Verify the original FCC ID, frequency, four-button Trunk configuration, OEM part number, and vehicle application before ordering or programming.

Programming & Compatibility

This smart key requires professional programming to the vehicle's immobilizer and proximity system before use.

The ID47 / HITAG3-compatible transponder and remote functions must be registered using compatible Acura / Honda locksmith or dealer programming equipment.

The emergency insert key must also be cut to match the vehicle for mechanical door access.

Because the KR5V1X FCC family is used across several configurations—including Acura remotes with Trunk and other Acura applications with Hatch—button configuration must be verified and should not be inferred from FCC ID alone.