Honda NX500 Key Replacement

Quick answerThe NX500 sold in the United States uses an ordinary cut key. Honda's 2025 owner's manual for the US and Canada has no immobilizer section, so a replacement key is cut to the bike and needs no programming. The same key works the ignition, the fuel cap and the lock for the one-piece seat.

Honda NX500 key quick facts

Honda's 2025 NX500 owner's manual for the US and Canada lists two ignition keys and a key tag carrying a key number and a bar code.
That manual has no HISS or immobilizer section and no immobilizer indicator.
The NX500 has a single one-piece seat released by a key lock, where its CB500F and CBR500R siblings have a bolted front seat and a keyed rear seat.
The helmet holder and tool kit are under the seat, and the helmet set wire is kept in the tool kit.
Honda warns NX500 owners not to lock the key in the compartment under the seat, because the seat latches by itself when pushed down.

Honda NX500 key types by year

Years	Models	Key type	Chip	Notes
2024-2025	NX500	mechanical cut key	no	Two keys and a bar-coded key tag from new. No immobilizer section in Honda's 2025 owner's manual for the US and Canada, which also covers the CB500F and CBR500R.
Varies	NX500 first sold outside the US	may be a transponder key (HISS)	varies	Honda's 2024 European manual for its 500 twins has a HISS section, so equipment differs by market. A HISS light on the dash of an imported bike means the key has a chip.

What kind of key the NX500 has

The NX500 arrived for 2024 as the adventure-styled member of Honda's 500 twin family. In the US it shares one owner's manual with the CB500F and CBR500R, and that manual describes the key in a single short passage: two ignition keys, one key tag with a key number and a bar code, and advice to store the spare and the tag somewhere safe. Nothing in it mentions a coded key, a chip, or an immobilizer light.

For you that means the key is a piece of cut metal and nothing more. A copy that is cut accurately starts the engine, and a bike with no keys left does not need any electronic part replaced.

Need a key for your NX500?

Call or text with the year and where the bike is parked.

Call (619) 775-1858 Text your year, make and model

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One seat, one lock, and what is under it

This is where the NX500 differs from its siblings. The manual marks most storage items as either NX500 or except NX500.

Seat: put the ignition key in the seat lock, turn it clockwise, and pull the seat back and up. It locks again on its own when pressed into place.
Helmet holder: under the seat, used with the helmet set wire
Tool kit: under the seat, held by a rubber strap, with the helmet set wire inside it
Document bag: strapped to the underside of the seat
Fuel fill cap: under a small lock cover on the tank, opened with the ignition key turned clockwise
Steering lock: part of the ignition switch, set by pushing the key down and turning to LOCK with the handlebar turned fully left

Small habits that prevent a lockout

Because the seat latches without the key, it is possible to drop the key into the tray while packing and push the seat shut on it. Honda prints a caution about exactly that. If it happens, the fix is opening the seat lock, not replacing anything.

The fuel cap holds the key until the cap is pushed down and locked, so a key that will not come out at the pump usually means the cap has not latched. Press the cap closed fully before pulling on the key.

Honda also notes that a metal key holder can mark the area around the ignition switch, which is worth knowing on a bike you plan to keep tidy.

If every NX500 key is gone

Honda's manual says that with all keys and the key tag lost, the dealer will probably have to remove the ignition switch assembly to read the key number. That requires getting a bike that cannot be started or unlocked to the dealership.

The alternative is having the key made where the bike is parked. We check photo ID against the registration or title, cut a key to fit the NX500's locks, and try it in the ignition, the fuel cap and the seat lock before we leave. If you still have the key tag, tell us when you call, since the key number on it saves time.

Where to find the key code

The key number is printed on the key tag supplied with the two keys, next to a bar code. Honda's manual tells you to keep the tag with the spare key, away from the bike. Without the tag or a key, Honda says the number is found by removing the ignition switch assembly.

What to have ready

Have this ready when you call or text

Year, make and model of the bike
Where the bike is parked
Whether you have any working key, a broken key or a key code
Photo ID and registration or title (we verify ownership before making a key)

Honda NX500 key FAQ

Is there a chip in the Honda NX500 key?

Not on the US model. Honda's 2025 owner's manual for the US and Canada describes two plain ignition keys and a key tag, with no immobilizer system. A bike first sold in another country can be different, so check the dash for a HISS light if yours is an import.

I shut my key under the NX500 seat. What now?

It is a known risk on this bike, since the seat locks itself when pushed down and Honda warns about it in the manual. The answer is a locksmith visit to open the seat lock, which gets your key back with nothing replaced. Keeping the spare at home rather than under the seat avoids a repeat.

Can a locksmith duplicate my NX500 key, or must I go to Honda?

Either works. Honda's own manual says to take the spare key and the key tag to your dealer or a locksmith for a duplicate. There is no programming step on the US bike, so the copy only has to be cut correctly.

Does the NX500 use the same key setup as the CB500X it replaced?

Both are plain-key bikes in the US. The NX500's own manual shows one key for the ignition and steering lock, the fuel fill cap and the single seat lock.

The immobilizer system on this bike

Honda HISS Immobilizer: Keys, Lost Keys and the Warning LightHISS, the Honda Ignition Security System, is Honda's chip-key immobilizer: the engine only starts when the bike recognizes a coded chip in the key.

More Honda models

Services for this bike

Locked Your Keys Under the Motorcycle or Scooter Seat?Keys get locked under the seat because most seats latch shut with a push and need no key to close.
When to Get a Spare Motorcycle Key, and Why NowGet a spare motorcycle key as soon as you are down to one working key.
How to Find Your Motorcycle Key CodeA motorcycle key code is a short number or letter-number code that tells a locksmith or dealer how to cut a key for your locks.
Motorcycle Helmet Lock Keys: Factory Holders and Add-OnsMost factory helmet holders use the ignition key, either directly in a small lock on the side of the bike or indirectly, because the helmet hangs on a hook that the locked seat or trunk traps.

Where we come to you

Sources

Page last updated November 14, 2026.