Honda & Acura Key Fob Replacement: Types, FCC IDs, and Programming

Replacing a Honda or Acura key fob comes down to three things: identifying which fob family the vehicle uses, matching the exact FCC ID and board version, and pairing the new fob to the immobilizer. The good news for anyone sourcing these daily is that Honda has used a relatively small set of fob platforms over the past two decades. The catch is that those platforms look nearly identical from the outside, and a fob that matches on button count alone will often refuse to program. This guide covers the fob families, the FCC IDs you'll see most often, what programming actually involves, and what replacement typically costs.

Honda and Acura Fob Families at a Glance

Honda's key hardware breaks into four broad families. Knowing which one you're holding tells you most of what you need before you ever look up a part number.

• Separate remote plus transponder key — common on early-2000s Civics, Accords, and Odysseys: a plain chipped key for the ignition and a detached button remote for the doors.
• Remote head key — the remote buttons are molded into the head of a bladed key. This was the dominant Honda format through the mid-2010s and stayed on base trims for years after.
• Smart key (proximity fob) — push-button start, keyless entry, and a hidden emergency blade inside the shell. Standard on most Honda and Acura models from roughly 2013 onward.
• Acura Driver 1 / Driver 2 smart fobs — many Acura proximity fobs are labeled by driver number and tie into seat and mirror memory. Either number will start the car, but customers notice when the memory feature stops matching, so match the driver number when you can.

If you only take one thing from the table, take the battery column: remote head keys almost always run the thin CR1616, while smart keys run the CR2032. Mixing those up is the most common reason a "dead fob" complaint turns into a second service call. Our Honda key fob battery guide walks through opening each shell without cracking it.

Common Honda and Acura FCC IDs

These are the IDs that cover a large share of the Honda and Acura vehicles on the road today. Treat this as a starting point, not a guarantee — always confirm against the customer's original fob or the vehicle build before ordering.

• OUCG8D-380H-A — separate button remotes on many early-to-mid-2000s Accords, Civics, Pilots, and Odysseys.
• N5F-S0084A — 2006–2011 Civic remote head keys.
• MLBHLIK-1T — remote head keys on 2007–2013 CR-V, Fit, Insight, and related models.
• N5F-A05TAA — 2013–2015 Accord and Civic remote head keys on lower trims.
• MLBHLIK6-1T — 2013–2015 Accord and Civic smart keys.
• KR5V1X — smart keys on the 2015–2016 CR-V and Pilot family.
• KR5V2X — the workhorse: 2016–2020 Civic, CR-V, Pilot, Ridgeline, and Odyssey smart keys, in several board versions.
• KR5T4X — 2022-and-newer Civic and related platforms.
• M3N5WY8145 — 2007–2013 Acura MDX and RDX smart keys.

Why the FCC ID Alone Isn't Always Enough

The FCC ID guarantees the radio hardware is legal on the same frequency — it does not guarantee the fob will pair with a specific car. KR5V2X is the classic example: it spans multiple board versions across different models and years, and a Civic board will not necessarily program to an Odyssey even though the label matches. Button count and layout matter too — a five-button Odyssey fob with power-door buttons is a different part than a four-button CR-V fob under the same ID.

So match in this order: FCC ID first, then part number or board version, then button count and layout. If the customer still has the original fob, the label inside the shell settles it — our guide to finding the FCC ID on a key fob shows where to look. If the original is lost, run the year, make, and model through our fob lookup tool and it will narrow the catalog to exact-fit matches.

Programming: What It Actually Takes

Honda pairing falls into three buckets, and the vehicle's age tells you which one you're in.

1. Onboard remote programming — many early-2000s Hondas accept a key-cycle and button-press sequence to enroll the door-lock remote. This only pairs the remote functions; the transponder chip in the key still needs a tool.
2. Tool-based pairing with a working key — the standard job on remote head and smart-key vehicles. A mainstream programmer connects over the OBD port and adds the new fob in a few minutes. Our key programmer comparison covers which tools handle Honda well.
3. All-keys-lost — with no working key, the immobilizer has to be accessed the long way. Expect more time, and on some newer models, extra steps to get the system into learn mode. Procedures vary meaningfully by model and year, so check coverage for the specific vehicle before quoting.

For a general walkthrough of onboard versus tool programming, see how to program a key fob.

What Replacement Typically Costs

Prices vary by market and by platform, but these are typical ranges seen in the trade:

• Aftermarket fob hardware at wholesale commonly runs from the low teens for older remotes to the $30–$60 range for current smart-key platforms.
• Dealer replacement including programming is often quoted in the $150–$400+ range for a smart key, depending on model.
• Locksmith replacement all-in — fob, cutting the emergency blade, and pairing — typically lands between $120 and $250 for a smart key, less for remote head keys. All-keys-lost jobs price higher because of the added time.

The spread between hardware cost and job price is exactly why Honda work is bread-and-butter volume for mobile locksmiths: the platforms repeat constantly, and a small stocked range covers a large share of calls.

FAQ

Can a car owner program a Honda fob themselves? On many early-2000s models, the remote functions — yes, via the onboard sequence. The transponder chip and any smart key require a diagnostic tool, so those jobs go to a locksmith or dealer.

Are aftermarket Honda fobs reliable? Quality varies by supplier, which is why matching by FCC ID and board version matters more than brand claims. A correctly matched aftermarket fob programs and performs like the original on these platforms.

What battery does a Honda key fob take? Remote head keys almost always use CR1616; smart keys use CR2032; older separate remotes typically use CR2025. When a recently replaced battery dies fast, check the shell for moisture damage or worn contacts.

Do Acura Driver 1 and Driver 2 fobs really matter? Both will program and start the vehicle. The driver number links to seat and mirror memory, so matching it keeps that feature working the way the customer expects.

Car Key Source stocks exact-fit aftermarket smart keys and remote head keys for Honda and Acura, matched by FCC ID and part number, with same-day dispatch by 4 PM ET from our Florida warehouse. Approved trade accounts get wholesale pricing on the platforms above — or run a vehicle through Find My Fob to pull the exact match in seconds.