Yamaha Smart Key: Code Card, Lost Fob and Emergency Mode

Quick answerYamaha's Smart Key System is a keyless fob that lets you switch on, start and unlock the bike or scooter without inserting a key. Each one is backed by a number, called the smart key emergency code on US paperwork and the identification number in the owner's manual. Yamaha says that if the smart key and that number are both lost, the entire smart key system has to be replaced, and that the company keeps no record of the number.

Yamaha Smart Key quick facts

Yamaha's 2021 US dealer bulletin names the Star Venture, Star Eluder, XMAX and TMAX as smart key models.
The bulletin says these models are supplied with one smart key and a card containing the smart key emergency code.
Yamaha states that it does not keep a record of the emergency code. The dealer is told to write it on the predelivery inspection sheet and in the owner's manual.
XMAX owner's manuals say the identification number is on the card and also on the inside of the smart key itself.
The TMAX manual says up to six smart keys can be registered to one vehicle, through a Yamaha dealer.
XMAX owner's manuals give the smart key's operating range as about 80 cm, roughly 31.5 inches, from the main switch.

Which bikes have Yamaha Smart Key?

Years	Models	Notes
2018 and later	Star Venture, Star Eluder	Named as smart key models in Yamaha's 2021 US dealer bulletin.
Smart key model years	XMAX	Yamaha's US site says the Smart Key System enables keyless starting, fuel tank and storage compartment access, and the handlebar lock.
Smart key model years	TMAX	Named as a smart key model in Yamaha's 2021 US dealer bulletin. The mechanical key is stored inside the smart key body, and what comes in the set can vary by market.

How the Smart Key works for the owner

The owner's manual puts it simply: the smart key system allows you to operate the vehicle without inserting a mechanical key. Keep the fob on you, and when it is within range the vehicle confirms it and lets you turn the main switch for a few seconds while the smart key indicator light is on. The manual gives the range as about 80 cm from the main switch, and it also describes an answer-back function that helps you find the vehicle in a parking lot.

The fob has its own on and off switch. If the smart key is turned off, the vehicle cannot be operated even when the fob is within range, which catches people out after the fob has been bumped in a pocket or bag. Pressing the switch for one second turns it back on.

What came with the bike: fob, mechanical key and number card

Yamaha's US dealer bulletin describes the set as one smart key, also called a key fob, and a card containing the smart key emergency code. XMAX owner's manuals describe one smart key, two mechanical keys and one identification number card, and tell owners to keep one mechanical key and the card in a safe place away from the vehicle. On the TMAX the mechanical key pulls out of the smart key body and slides back in after use. What you received can vary by model and market, so check your own manual.

The number is the part that matters. The manual says it is printed on the card and can also be found on the inside of the smart key itself. Yamaha's bulletin tells dealers to write it in the key number box on the predelivery inspection sheet and legibly in the owner's manual, and adds that Yamaha does not keep a record of this information.

Find the card now and store it with your title, not under the seat.
Check the owner's manual and your sales paperwork for a handwritten code.
If you bought the bike used and got no card, ask the seller, then ask the original dealer whether the predelivery sheet is on file.

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What the manual says about a lost smart key

If a smart key is lost, the manual says to contact a Yamaha dealer immediately to prevent the vehicle from being stolen. If you still have the identification number, you are in a recoverable position: the manual describes an emergency mode that lets the vehicle be turned on and the engine started when the smart key is lost, damaged or has a dead battery, using the identification number and the mechanical key. The steps are in your owner's manual, and the mode cancels itself if they are not completed in time.

If the smart key and the number are both gone, Yamaha's wording is that the entire smart key system will need to be replaced. The dealer bulletin calls that the only way to remedy the situation and a costly solution. This is the worst case on any Yamaha we work on, and we will tell you plainly when you are in it.

What you have	Where you stand
Working smart key, no card	Fine for now. Read the number from inside the smart key and record it.
Number card, no smart key	Emergency mode is described in the manual. A replacement smart key is registered through a Yamaha dealer.
Neither smart key nor number	Yamaha says the entire smart key system must be replaced.

Fob battery and warning signs

The manual puts smart key battery life at approximately two years, depending on use, and notes that the battery can run down even when the fob is away from the vehicle. A fob that sits where it constantly receives radio waves will discharge quickly. Replace the battery when the smart key system indicator light flashes for about 20 seconds as the vehicle is first turned on, or when the indicator on the fob no longer lights. If a fresh battery does not fix it, Yamaha says to have a dealer check the vehicle.

Do not store the smart key in a storage compartment on the vehicle. Vibration and heat can damage it.
Keep it away from strong magnets and from electric medical equipment.
Do not drop it, bend it, get it wet, or try to modify it.

Dealer route versus mobile locksmith

Spare smart keys are a dealer item in Yamaha's manual: it says to see a Yamaha dealer regarding spare smart keys. Replacing a whole smart key system is also dealer parts work. Where we help is the rest of the job: sorting out which situation you are actually in, mechanical keys, a seat or storage lock that will not open, and lock repair on the scooter itself. Have your photo ID, registration or title, the VIN, the number card if you have it, and any key or fob that came with the bike, working or not.

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)

Yamaha Smart Key FAQ

What is the Yamaha smart key emergency code?

It is the number on the card that came with your smart key, called the identification number in the owner's manual. It is what lets the vehicle be started in emergency mode and what stands between a lost fob and a full system replacement.

Can Yamaha look up my smart key code from the VIN?

Yamaha's own dealer bulletin says it does not keep a record of the code. The selling dealer may have written it on the predelivery inspection sheet or in your owner's manual, so check both.

I lost my XMAX smart key but still have the card. What now?

Keep the card safe and read the emergency mode section of your owner's manual, which covers starting the scooter with the identification number and the mechanical key. Then see a Yamaha dealer about a replacement smart key.

My Yamaha smart key is not being detected. Is it broken?

Check first that the fob has not been switched off, then replace its battery. The manual says the fob has an on and off switch and that battery life is about two years.

How many smart keys can a Yamaha have?

The TMAX owner's manual says up to six smart keys can be registered for the same vehicle, and that spare smart keys are arranged through a Yamaha dealer.

Models with Yamaha Smart Key

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Services that can help

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Page last updated November 14, 2026.