BMW airheads and K 75, K 100, K 1100 Key Replacement

Quick answerClassic BMWs, meaning the air-cooled R 65, R 75, R 80, R 90 and R 100 boxers and the K 75, K 100 and K 1100, use plain mechanical keys with no transponder. A lost key can be cut to the bike's existing locks without any programming. The usual complications are age-related: worn locks, bikes that have collected several different keys over the decades, and luggage on its own numbered key.

BMW airheads and K 75, K 100, K 1100 key quick facts

None of these bikes has an electronic immobilizer: BMW's EWS came to its motorcycles in the mid-2000s.
Original BMW keys of this era were steel, and airhead key blanks and classic K bike key blanks interchange.
The key code usually came on a flexible plastic tag supplied with the original keys.
The steering head lock on airheads is a separate lock from the ignition; one BMW steering lock part is listed for /6 models through the K 100.
BMW tour bags with flat latches carry their own key number, stamped on the latch and visible after opening it.

BMW airheads and K 75, K 100, K 1100 key types by year

Years	Models	Key type	Chip	Notes
1970-1973	/5 airheads (R 50/5, R 60/5, R 75/5)	uncoded ignition and lights key	no	The /5 ignition key has no coding. Other locks on the bike use cut keys.
1974 to the mid-1990s	R 65, R 75, R 80, R 90 and R 100 airheads	mechanical cut key (steel)	no	Coded keys with a key code on a plastic tag when new.
1980s and 1990s	K 75, K 100, K 1100	mechanical cut key	no	Locks on a K 75 include the ignition switch, steering head lock, seat latch, fuel filler, saddlebags and top case.

Steel keys and why some shops turn them away

BMW's original keys for these bikes were steel, not the nickel-plated brass most key machines see all day. Long-time airhead references note that many locksmiths will not cut steel keys, which is why owners so often end up with soft brass copies that wear fast and start sticking within a few years. The same references note that airhead blanks and classic K blanks are the same family, so a shop that is set up for one can do the other.

We cut these keys at the bike. If you have an original steel key in good shape, bring it. If all you have is a third-generation copy, we would sooner work from the lock or the key code than duplicate the wear.

Need a key for your R 80?

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

Call (805) 429-8452 Text your year, make and model

Or read first: all services · common questions · about us · contact details

How many locks, and do they match?

A classic BMW has more locks than its age suggests, and after forty or fifty years they do not always answer to one key.

Ignition: on the /5 a simple uncoded key works the ignition and lights; later airheads and all K bikes use a coded key
Steering head lock: a separate lock at the steering head that can be stiff if it has not been used in years
Seat latch and fuel filler: on the K 75 the low seat latch and the fuel filler share one type of lock cylinder
Saddlebags and top case: factory luggage on K bikes has its own cylinders; airhead tour bags have latches with a stamped key number

Finding the code on a bike this old

When these motorcycles were new, the key code came on a flexible plastic tag with the keys, and a dealer could order a coded key already cut. Some dealers can still special-order old coded keys. In practice the tag is usually long gone, and the ignition lock may not even be the one the bike left the factory with.

So the first step on a visit is to see what is actually on the motorcycle. We check each lock, note which ones share a key, and tell you whether the set can be brought back to a single key or whether a tired lock is better replaced. Luggage latches are handled by their stamped number.

Lost keys, barn finds and estate bikes

A classic BMW often turns up with no keys: a project bought without them, a bike inherited from a relative, or one that sat in a garage for twenty years. Because there is no chip, the job is purely mechanical. We confirm ownership with photo ID and the title or registration, make a key to the ignition, then work through the steering lock, seat, fuel cap and luggage in the order that matters to you.

Paperwork is often the slower part on older bikes. If the title is not yet in your name, have the bill of sale and whatever transfer documents you hold, and tell us when you call. A seized steering head lock or a damaged ignition switch can be repaired or replaced during the same visit, and on a bike this age it is worth budgeting for at least one lock that needs more than a key.

Where to find the key code

Originally on a flexible plastic tag that came with the keys. BMW luggage latches carry their own number stamped on the latch. If the tag is lost, the key is made from the lock.

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 airheads and K 75, K 100, K 1100 key FAQ

Does a BMW R 100 or K 75 need a programmed key?

No. These bikes were built long before BMW fitted an immobilizer to its motorcycles. A correctly cut key is all that is needed.

Why did the hardware store refuse to copy my airhead key?

Original BMW keys of that era are steel, and many shops will not cut steel blanks. A brass copy works for a while but wears quickly. We cut keys for these bikes on site.

My K 100 has three different keys. Can it go back to one?

Often, yes. Locks get swapped over the years, especially seats, fuel caps and luggage. We check which cylinders can be matched to the ignition key and which are better replaced.

Is the /5 ignition key really the same for every /5?

The /5 ignition and lights key has no coding, so it is not a security key in the modern sense. The steering lock and other locks on the bike are separate and do use cut keys.

More BMW models

Services for this bike

Vintage and Classic Motorcycle Keys: Codes, Blanks, WearA key can usually be made for a vintage motorcycle even when no original survives, because these are plain mechanical locks with no chip.
Bought a Used Motorcycle With No Key? Here's What to DoA used or auction motorcycle without keys can usually get new ones, but plan on the full all-keys-lost process and bring the signed title or other transfer paperwork plus photo ID, since a locksmith or dealer has to tie you to the VIN.
Rekey Motorcycle Locks or Just Cut a New Key?Cutting a new key replaces the key you lost, while rekeying changes the locks so the old key no longer works.
Lost Keys and Lost Title or Registration in CaliforniaIf the registration and title are gone along with the keys, replace the paperwork first.

Where we come to you

Sources

Page last updated November 14, 2026.