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FCC ID cross-reference

FCC ID KR5V21

Fits Acura (2018–2021)

KR5V21 is the FCC ID printed on the label under the fob’s battery cover — on this code we verify fit for Acura (2018–2021). 1 aftermarket replacement is published, all in stock.

See the part
  • Makes
    1
    Acura
  • Models
    2
  • Model years
    2018–2021
  • Frequency
    434
    MHz
  • In stock
    1 / 1
    1 SKU
Will it fit?

Vehicles verified for KR5V21

Acura

2 models
  • ILX
  • TLX

Model years 2018–2021.

Part numbers & specs

Cross-reference data for KR5V21

Cross-references (original part numbers)

1

The original part numbers our aftermarket KR5V21 replacement matches against. Tap a number to copy it.

Electronics

Frequency
434 MHz
Transponder chip
NCF29** / HITAG 3 / 47 CHIP
Buttons
4
Key types
Smart Key
IC ID (Canada)
Visual guide

Four checks before you program

  1. 1

    FCC ID on the label

    The code on the customer's key must read exactly the same.

    This code
    KR5V21
  2. 2

    Frequency

    A remote on the wrong frequency will never talk to the car, even if it looks identical.

    This code
    434 MHz
  3. 3

    Buttons & layout

    Match the button count and the button layout to the original key.

    This code
    4-button
  4. 4

    Transponder chip

    For push-to-start and keyed ignitions, the chip has to match the immobiliser.

    This code
    NCF29** / HITAG 3 / 47 CHIP
Programming guaranteeIf it won't program on the listed vehicle, we refund it and pay the return freight.Terms
Order

Aftermarket replacements for KR5V21

1 of 1 in stock
2018-2021 Acura / 4-Button Smart Key / PN: 72147-TZ3-A21 / KR5V2X (Aftermarket)
Low stock
In stock
CKSSmart Key

2018-2021 Acura / 4-Button Smart Key / PN: 72147-TZ3-A21 / KR5V2X (Aftermarket)

FCC KR5V2X KR5V21 (Superseded)434MHz4-btn2018–2021NCF29** / HITAG 3 / 47 CHIP
Members-only pricing
View details
Quick answers

Quick answers — FCC ID KR5V21

What vehicles use FCC ID KR5V21?

FCC ID KR5V21 is verified in our catalog for Acura (ILX, TLX), model years 2018–2021.

What chip and frequency does KR5V21 use?

KR5V21 keys use the NCF29** / HITAG 3 / 47 CHIP transponder chip and operate at 434 MHz.

Is there a replacement for KR5V21?

Yes — Car Key Source stocks 1 aftermarket smart key replacement for FCC ID KR5V21, sold wholesale to the trade with US & Canada same-day dispatch.

What original part numbers cross-reference to KR5V21?

FCC ID KR5V21 cross-references to original part number 72147-TZ3-A21 — our replacements are matched against these originals.

More Acura FCC IDs we stock

Browse all FCC IDs

Need help confirming fit for KR5V21?

Leave your email and phone — we’ll verify the cross-reference against the vehicle on your bench and reply with the exact SKU. No spam, ever.

So we can call you about fitment or your order.

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