2019–2020 Acura RDX Smart Key Remote / 4-Button / FCC ID: KR5T21 / PN: 72147-TJB-A01 / 433 MHz (OEM)
Fits2019 Acura RDX,2020 Acura RDX
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Low stock — 5 or fewer left. Order soon.
Volume pricing on this SKU
1–4 units
Wholesale
5–9 units
Save 5%
10–24 units
Save 10%
25+ units
Save 15%
Order by 4 PM ET — ships today
Ships from Ontario — Shipped to all 50 states from our Ontario facility — one freight price, quoted at checkout
Makes
Models
Years
2019–2020Confirm the exact fit by FCC ID or part number before ordering.
Ships unprogrammed. Like any replacement key, it has to be programmed to the vehicle before it will operate. Programming method, tooling and PIN access vary by vehicle, year and platform, so we don't publish per-vehicle procedures or tool compatibility here — match the part on the codes below and use your usual process for that platform. Not sure? Email the trade desk with the VIN or year/make/model before you order.
If it won't program on the listed vehicle, we refund it and pay the return freight. Two conditions only: the vehicle matches this listing, and the part comes back in resaleable condition — a blade cut only to turn the ignition for the programming attempt doesn't void it. Reply with the vehicle, the tool you used and the error, and we send the return label. Read the guarantee.
Specifications
- Brand
- Acura
- Type
- Smart Key
- FCC ID
- IC (Canada)
- Part number
- Chip / transponder
- ID47
- Frequency
- 433 MHz
- Buttons
- 4
- SKU
FCC ID: KR5T21 IC: 7812D-T21 OEM Part Number: 72147-TJB-A01 Frequency: 433 MHz Chip Type: ID47 Memory Slot: Driver 1 Battery: CR2032 (pre-installed) Buttons: Lock, Unlock, Hatch, Panic Emergency Key Blade: Included (Aftermarket EKB-ACU-1554, uncut) Test Key: HO01 Condition: Brand New OEM
Best-Price Guarantee
Found it cheaper? We'll match it.
See the same in-stock part advertised for less by another Canadian or U.S. trade supplier? Send us the listing before you order and we'll match the price — we'd rather earn the reorder than lose it over a dollar.
- Same item, in stock, from a verified trade supplier
- Current advertised price — send the link or a screenshot
- Excludes clearance, liquidation, auction and obvious pricing errors
How to verify this smart key fits
- Check the FCC ID on the customer's existing smart key — it is printed on the case, often under the battery cover — against KR5T21.
- On Canadian-market remotes the IC certification number should read 7812D-T21.
- Match the part number 72147-TJB-A01.
- Confirm the frequency is 433 MHz — remotes on a different frequency are not interchangeable even when the shell looks identical.
- The transponder chip is ID47.
- Count the buttons: this smart key has 4.
- Find the vehicle in the 2-row fitment table on this page; year ranges and trims matter.
Look it up by code or vehicle
- FCC ID KR5T21 — every part we list under this code, with fitment
- Acura keys & remotes
- Acura RDX keys & remotes
Guides for this part
- Nissan & Infiniti KR5 Smart Keys: KR5S180144, KR5TXN by Year
- Honda 72147 Part Numbers: Reading the Suffix (TGV, TK8, T43, TJB)
- Acura Key Fob Replacement: FCC IDs, 72147 Part Numbers & Programming
- Honda & Acura Key Fob Replacement: Types, FCC IDs, and Programming
- Where to Find the FCC ID on a Key Fob (and Why It Guarantees Fit)
- 315 vs 433 vs 902 MHz Key Fobs: How to Tell and Why It Matters
If it doesn't program, it's on us
Every listing carries its FCC ID, part number and cross-references, so you can match the part in your hand before you order — and the trade desk will confirm it with you if you're not sure. If a key or remote you bought for the vehicle we listed it against still won't program, tell us within 30 days of delivery: we refund it and we pay the return freight. Two conditions, both fair — the vehicle matches the listing, and the part comes back in resaleable condition.
Confirm the exact part by FCC ID / part number / cross-reference
Won't program on the listed vehicle? We refund it and pay the return freight — 30 days from delivery
30-day hassle-free trade returns
Fits the same vehicles
Original Lishi HO01/HON66 Honda & Acura 2-in-1 Pick & Decoder
2006-2013 Acura / Honda Civic / 4-Button Remote Head Key / N5F-S0084A (Aftermarket)
2007-2008 Acura TL / 4-Button Flip Key / PN: 3511-306 / OUCG8D-439H-A (AFTERMARKET)
