BMW C 400 X and C 600 Sport scooters Key Replacement

Quick answerBoth scooters use BMW's EWS immobilizer, so a lost key needs a programmed replacement. The C 600 Sport has a keyed ignition with two ignition keys, and its seat and fuel tank cover are released from the ignition lock itself. The C 400 X comes either with two ignition keys or with optional Keyless Ride, a fob and an emergency key.

BMW C 400 X and C 600 Sport scooters key quick facts

BMW's 2013 US rider's manual for the C 600 Sport says you receive two ignition keys.
On the C 600 Sport the seat release and the tank cover release are integrated in the steering and ignition lock.
The C 600 Sport's left-hand front storage compartment is locked together with the steering lock.
BMW's 2018 US manual for the C 400 X lists two ignition keys, or with optional Keyless Ride one radio-operated key and one emergency key.
On a keyed C 400 X the seat can be unlocked with the ignition key in a lock on the right-hand side trim panel, without switching on the ignition.

BMW C 400 X and C 600 Sport scooters key types by year

Years	Models	Key type	Chip	Notes
About 2012-2015	C 600 Sport	transponder key (EWS), keyed ignition	yes	Two ignition keys. A topcase with a lock for the same key can be ordered. The later C 650 Sport follows on from it; we confirm its key from your VIN.
From around 2018	C 400 X (keyed)	transponder key (EWS)	yes	Two ignition keys. The front storage compartments cannot be locked on this version.
From around 2018	C 400 X (Keyless Ride option)	Keyless Ride radio fob plus emergency key	yes	Ignition, tank filler cap and alarm are controlled with the fob. Seat lock and topcase are operated by hand.

C 600 Sport: everything runs through the ignition lock

On most motorcycles a lost key leaves you with a seat lock and a fuel cap to deal with separately. The C 600 Sport is built differently. Its overview pages show the seat release and the tank cover release as functions of the steering and ignition lock: you press the ignition key down in the lock and turn it to pop the fuel cover, and the seat is released from the same place. The left front glove compartment locks whenever the steering lock is engaged.

The practical result is that one lock controls access to the whole scooter. If the key is lost, or the ignition lock is damaged, you cannot refuel, reach the under-seat storage or get to anything left in the locked compartment. It also means a worn ignition lock on a C 600 Sport shows up as a seat or fuel flap that will not release, not only as a key that is hard to turn.

Need a key for your C 400 X?

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 X: two versions, two seat routines

The C 400 X manual describes both builds side by side. On the keyed scooter you switch on the ignition and press a button to unlock the seat, or you put the ignition key into a separate lock on the right-hand side trim panel and turn it clockwise. On the Keyless Ride scooter the same side lock takes the fold-out blade of the fob.

Keyless Ride on the C 400 X covers the ignition, the tank filler cap and the alarm. The steering lock engages from the button with the bars turned left. BMW notes that the seat locking mechanism and a topcase are operated manually, and the scooter has a marked emergency release for the seat among its under-panel components.

Under-seat storage and the flexcase

Both scooters carry BMW's flexcase, a fold-down extension of the under-seat compartment for parking with helmets inside. The C 600 Sport manual notes that the vehicle cannot be started with the bottom lowered, and the C 400 X shows a display message when the flexcase is open. If your scooter cranks or powers up but refuses to start right after a key was replaced, check that the flexcase is closed before blaming the new key.

Keys locked under the seat are a classic scooter problem. On these two models the seat is tied to the ignition lock or to the fob, so say which version you have and whether any key at all is outside the scooter.

All keys lost on a BMW scooter

The scooter needs a key its EWS recognizes. BMW's manuals say emergency and spare keys are only available through an authorized retailer, who must check the request, and that a lost key can be disabled. That route means getting a scooter with a locked steering head to the dealer.

We work where the scooter is parked. Bring photo ID and the registration or title, and tell us the model, the year and whether it is keyed or Keyless Ride. On the C 600 Sport the first goal is a key that turns the ignition lock, because that alone brings back the seat, the fuel cover and the glove compartment. Programming is done at the scooter where the model allows, and we say so before booking if yours needs the dealer.

Where to find the key code

Neither manual describes a key code tag. BMW supplies keys for these scooters against the VIN after checking ownership.

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 X and C 600 Sport scooters key FAQ

How do I open the fuel flap on a C 600 Sport without the key?

You cannot do it the normal way, because the tank cover release is part of the ignition lock. Once a new key is made, pressing it down in the lock and turning releases the cover as before.

Does the BMW C 400 X have a chip key?

Yes. Both the keyed and Keyless Ride versions use the EWS electronic immobilizer, which only enables a start once the key or fob has been recognized as authorized.

My C 400 X will not start and shows a flexcase message. Is that a key problem?

Probably not. The scooter warns when the flexcase under the seat is open. Close it fully and try again before looking at the key.

Can the C 400 X glove boxes be locked?

On the keyed version BMW's manual says the front storage compartments cannot be locked. Do not leave documents or a spare key in them.

The immobilizer system on this bike

BMW Motorcycle EWS Immobilizer: Keys and the EWS WarningEWS is BMW Motorrad's electronic immobilizer.
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.

More BMW 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.
Scooter Seat and Storage Locks: How They Open and FailScooters open the seat in one of three basic ways: a separate seat lock that takes the ignition key, a seat position on the ignition switch, or an electric button or keyless fob.
Scooter Key Replacement: Shutters, Seat Locks and ChipsYes, a key can be made for almost any scooter, and on most 50cc to 150cc models it is a plain metal key with no chip.
Lost the Key to Your Motorcycle Disc Lock or Chain?Start with the lock maker: most quality disc locks and chains come with a key number or code, and makers such as Kryptonite and Xena supply replacement keys against it.

Where we come to you

Sources

Page last updated November 14, 2026.