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KYMCO AK 550 and CV3 Key Replacement

The AK 550 and the three-wheeled CV3 have no ignition key.

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Quick answerThe AK 550 and the three-wheeled CV3 have no ignition key. Both use KYMCO's KEYLESS main switch, a knob that only works when one of the two remote controls is nearby. A weak remote battery can usually be worked around with the short-range mode, but if both remotes are lost KYMCO's manual sends you to a dealer for inspection or replacement.

KYMCO AK 550 and CV3 key quick facts

  • Each AK 550 is supplied with two KEYLESS remote controls, and the manual says the main switch cannot be activated if the remote is lost.
  • The AK 550 remote takes a CR2450 battery. The CV3 wireless key takes a CR2032.
  • The AK 550 manual warns not to lose the antenna sticker inside the remote case when changing the battery.
  • Short-range mode: hold the back of the remote against the circular mark on the scooter and the main switch can still be unlocked.
  • The AK 550 luggage box opens mechanically by pushing down the main switch and turning it counterclockwise, or electronically from the SEAT button.

KYMCO AK 550 and CV3 key types by year

YearsModelsKey typeChipNotes
2018-presentAK 550, AK 550iKEYLESS remote control, two suppliedyesCR2450 battery. Remote sensing distance is given as roughly 0 to 5 metres, for reference only.
2023-presentCV3KEYLESS wireless key, two suppliedyesCR2032 battery. If the wireless key is flat, it is placed by the circular symbol on the right side of the centre switch set.

A knob instead of a keyhole

KYMCO describes KEYLESS as an electronic master switch that requires no key. On the AK 550 the main switch is a knob with a backlit ring. With a recognised remote in range the ring lights blue with two short beeps and the knob can be turned to ON, OFF or LOCK. With no remote, it does nothing.

The CV3 uses the same concept with a different fob. Its manual calls the fob a wireless key and warns that anyone standing within sensing range while your key is nearby could start the vehicle, so take the key with you when you walk away.

Need a key for your AK 550?

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

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

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When the remote is not detected

KYMCO's manuals list the ordinary causes before any fault:

  • A weak remote battery, which shortens the sensing distance before it stops working altogether
  • Strong radio sources nearby, such as broadcast towers or power plants
  • The remote touching or covered by metal, or sitting next to another keyless vehicle's fob
  • The remote stored in the front or rear storage of the scooter, where the manual says detection may suffer

The short-range backup

Both vehicles have a fallback for a flat fob. On the AK 550 you place the back of the remote, the side without buttons, against the circular mark and operate the main switch; two short beeps confirm it. On the CV3 the wireless key goes near the circular symbol on the right side of the centre switch set. Learn where that mark is before you need it, and carry a spare coin cell on long trips.

One caution from the AK 550 manual: when you open the remote, there is an antenna sticker inside the case. Lose it and the remote may stop working properly.

Lost one remote, or both

Losing one remote leaves you riding on your only backup. Replace it promptly, and ask for the lost one to be removed from the vehicle's memory if that can be done for your model. Losing both is the hard case. KYMCO's guidance for the AK 550 and the CV3 is identical: visit the dealer for inspection or replacement. Call us with the model, year and VIN and we will tell you plainly whether it is something we can handle where the vehicle sits or whether the dealer is the right route.

For any keyless work we ask for photo ID and the registration or title.

Where to find the key code

A keyless remote has no cut pattern to look up. What matters is that the remote is registered to the vehicle. Keep the second remote and your purchase paperwork at home, and have the VIN ready when you ask about a replacement.

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)

KYMCO AK 550 and CV3 key FAQ

What battery does the AK 550 remote use?

A CR2450, according to KYMCO's manual. Watch for the antenna sticker inside the case when you change it.

What battery does the KYMCO CV3 key use?

A CR2032.

My AK 550 remote battery died and I'm away from home. Can I still start it?

Usually. Hold the back of the remote against the circular mark on the scooter and operate the main switch. The short-range mode is there for exactly this.

How do I open the AK 550 seat without the SEAT button?

The manual gives a mechanical method: push down the main switch and turn it counterclockwise to the seat position. The main switch still has to be unlocked by a remote first.

I lost both remotes. What happens now?

KYMCO's manual says to go to the dealer for inspection or replacement. Call us first with the details and we will advise honestly on the options for your vehicle.

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