BMW C 400 GT and C 650 GT scooters Key Replacement

Quick answerBMW's maxi scooters use the same EWS immobilizer as its motorcycles. The C 400 GT manual describes Keyless Ride with one radio-operated key and one spare key, while the C 650 GT manual describes a keyed ignition with two ignition keys. On both, the under-seat storage is behind the key system, so a lost key usually means a locked seat as well as a scooter that will not start.

BMW C 400 GT and C 650 GT scooters key quick facts

The C 400 GT manual says you receive one radio-operated key and one spare key.
On the C 400 GT the seat is released with a button when the ignition is on, or with the unfolded key in a lock on the right-hand side trim panel.
With a flat fob battery, the C 400 GT is started by holding the key against the battery cover at the antenna.
The C 650 GT manual says you receive two ignition keys.
On the C 650 GT, locking the handlebars also locks the left stowage compartment.
The C 650 GT shows EWS with an exclamation mark and a yellow warning light when the immobilizer is active.

BMW C 400 GT and C 650 GT scooters key types by year

Years	Models	Key type	Chip	Notes
From around 2019	C 400 GT	Keyless Ride fob plus spare key	yes	Ignition, fuel filler cap and alarm work with the radio-operated key. The C 400 X shares the platform; we confirm its key from your VIN when you call.
Keyed version	C 650 GT	transponder key (EWS), keyed ignition	yes	Two ignition keys. If your scooter has a button in place of a key slot, tell us when you call.

C 400 GT: Keyless Ride on a scooter

The C 400 GT manual describes Keyless Ride as the only key system. The ignition, fuel filler cap and alarm all work with the radio-operated key, and the steering lock engages with an audible click when you press and hold the button with the handlebars turned left. The manual warns that if the key goes out of range, for example inside the top case, the scooter cannot be started.

The seat is the lock owners ask about most. With the ignition on, a button releases it. With the ignition off, you unfold the key blade from the fob, insert it into a lock on the right-hand side trim panel and turn it clockwise. The seat lock and top case are otherwise locked and unlocked by hand.

Need a key for your C 400 GT?

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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C 400 GT with a flat or lost fob

If you lose the radio-operated key on a journey, the manual says the spare key will start the scooter. If the fob battery is empty, you hold the spare key or the fob against the battery cover at the antenna position, with the key touching the cover. The fob takes a CR 2032 battery. A lost fob can be barred by a BMW retailer if you bring all other keys, and it can be reactivated later if it turns up.

C 650 GT: keyed ignition with EWS

The C 650 GT manual describes a conventional ignition switch and steering lock with two ignition keys. Locking the handlebars also locks the left stowage compartment, which is worth knowing if that compartment will not open. BMW says the top case can be fitted with a lock that opens with the same ignition key.

When the immobilizer is active, the general warning light shows yellow and EWS with an exclamation mark appears on the display. The manual's cause is a key that is not authorized or disrupted communication between the key and the engine electronics. Its remedies are to remove all other ignition keys from the ring, use the second key, and have a defective key replaced.

Lost every key to a BMW scooter

Scooter owners tend to keep the registration under the seat, which is exactly where you cannot reach it with no key. Opening the seat is part of the visit, and we still need to see photo ID and proof of ownership before a key is made. The replacement is then cut and programmed to the scooter at the curb or in your garage where the model and year allow it, so tell us exactly which scooter you have. The dealer alternative is a key ordered against the VIN plus transport for a scooter that may have its steering locked.

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)

BMW C 400 GT and C 650 GT scooters key FAQ

How do I open the C 400 GT seat with the ignition off?

BMW's manual says to insert the unfolded radio-operated key into the lock on the right-hand side trim panel and turn it clockwise. With the ignition on, a button does the same job.

Where do I hold the key to start a C 400 GT with a dead fob?

Against the battery cover at the antenna position, according to BMW's manual. The spare key works the same way.

What does EWS mean on my C 650 GT display?

The immobilizer has not accepted the key. BMW's manual says to take other keys off the ring and try the second key before having the key replaced.

My registration is locked under the seat. Can you still help?

Yes. We open the seat as part of the visit, then check your photo ID and registration before making the key.

The immobilizer system on this bike

BMW Keyless Ride: Lost Fob, Flat Battery and Emergency KeyKeyless Ride replaces the ignition lock on many BMW motorcycles with a button and a radio-operated key that only has to be within about 3 feet of the bike.
BMW Motorcycle EWS Immobilizer: Keys and the EWS WarningEWS is BMW Motorrad's electronic immobilizer.

More BMW models

Services for this bike

Motorcycle Key Fob and Keyless Ignition ProblemsMost keyless motorcycle problems come down to a weak fob battery, a fob the bike is not reading, a damaged fob or a lost one.
Motorcycle Gas Cap, Seat or Steering Lock Stuck? What to DoStuck gas cap, seat and steering locks on motorcycles usually come down to grime or corrosion in an exposed cylinder, a worn key, a stretched seat cable, or parts under tension that hold the latch closed.
Proof of Ownership for a Motorcycle Key in CaliforniaA legitimate California locksmith will ask for photo ID plus the motorcycle's registration or title before making a key, because state law requires locksmiths to record your ID, the bike's VIN and registration details, and your signature for every vehicle key they originate.
Signs Your Motorcycle Ignition Switch Is FailingA motorcycle ignition switch is two parts in one housing: a lock cylinder that reads the key and an electrical switch that powers the bike.

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Sources

Page last updated November 14, 2026.