Benelli TNT300 and 302S Key Replacement

Quick answerBenelli's 300 class twins, the TNT300 and the 302S that followed it, use a plain cut key for the ignition, the steering lock and the fuel cap. The US manuals describe no chip or code card. The battery and tool bag are under the seat, so a working key matters for more than starting. A lost key can be cut at the bike.

Benelli TNT300 and 302S key quick facts

The TNT300 manual locks the steering by turning the handlebars all the way left, then pressing in and turning the ignition key all the way left.
On both bikes the fuel cap opens by inserting the key and turning it clockwise; the tank holds about 16 litres.
The battery is under the seat on the TNT300 and the 302S, and the 302S manual locates the fuse next to the battery.
The tool bag is under the seat cushion on the TNT300 and in the seat cushion area on the 302S.
The manual for the related BN302 lists the same key for opening the saddle.

Benelli TNT300 and 302S key types by year

Years	Models	Key type	Chip	Notes
From around 2017	TNT300	cut key	no	Ignition with an ON and a LOCK position, fuel cap opened with the key. No immobilizer in the US manual.
From around 2019	302S	cut key	no	Faired successor on the same twin. The key locks the steering with a push and a turn and opens the fuel cap.

The twins and their manuals

The TNT300 was one of the two models that brought Benelli back to US showrooms, a naked bike with a 300 cc parallel twin and a trellis frame. The 302S is the faired version that came later on the same engine. SSR Motorsports publishes a separate owner's manual for each, and the two agree on the key. There is an ignition switch with an on position and a lock position, and a fuel tank cap that takes the ignition key.

The TNT300 manual puts the purpose of the lock position in plain words: with the bars turned fully left and the key pressed in and turned, the handlebars are locked to prevent theft, and turning the key to the right unlocks them. The 302S manual describes the same motion and ends with take out the key, in this condition the vehicle has been locked.

Need a key for your TNT300?

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Under the seat: battery, fuse and tools

Both manuals send you under the seat for nearly everything.

Battery: under the seat on both models. The removal steps begin with taking the seat off.
Fuse: the 302S manual says it is located next to the battery.
Tool bag: stored with the seat cushion.
Air filter: reached by removing the seat, fuel tank and side covers.

Push, then turn

The steering lock on these bikes needs the key pushed into the switch before it will turn to the lock position, and the 302S manual says to press the key in with proper force. If you are used to a lock that simply turns, it is easy to twist first and push second, and then the key takes the strain.

The 302S manual adds a safety note: do not turn the key toward lock while riding.

When every key is missing

A TNT300 or 302S with no keys is a mechanical job. After checking photo ID and the registration or title, we make a key from the ignition lock on the bike and confirm that it also works the fuel cap and the seat release. If a previous owner fitted a different ignition switch, the fuel cap may be on another key, and we will tell you what we find. Let us know if the battery is flat too, since it sits under the seat.

Where to find the key code

Neither US manual has a key number page or describes a key tag. Check the original keys for a stamped number and the dealer's delivery paperwork. If nothing turns up, a key is made from the locks on the bike.

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)

Benelli TNT300 and 302S key FAQ

Does the Benelli 302S have an immobilizer?

The US owner's manual describes a plain cut key, an ignition switch and a steering lock, and does not mention an immobilizer, code card or fob.

Are the TNT300 and 302S keys the same?

They are the same kind of key on closely related bikes, but each key is cut for one bike's locks.

How do I lock the steering on a TNT300?

Turn the handlebars fully to the left, press the key in and turn it all the way left, then remove it. Turning the key to the right unlocks the bars.

Where is the battery on a 302S?

Under the seat, with the fuse next to it. That is why a lost key and a flat battery together need the key sorted first.

More Benelli models

Services for this bike

Motorcycle Steering Lock Explained: How It Works and JamsA steering lock, called a fork lock by Harley-Davidson, is a bolt that holds the front end turned to one side so the bike cannot be wheeled away in a straight line.
Worn or Bent Motorcycle Key: Signs, Risks and the Right FixA worn motorcycle key shows up as a key that needs wiggling, works in one lock but not another, or works worse than the spare.
Lost Your Only Motorcycle Key? What to Do NextIf you lost the only key to your motorcycle, a new one can almost always be made, but the route depends on whether your bike uses a plain metal key, a chipped transponder key, or a keyless fob.
Honda Smart Key Indicator Flashing: Gold Wing Owner GuideOn the Gold Wing described in Honda's 2018 US owner's manual, the Honda Smart Key indicator should come on briefly when the ignition switch is turned on and then go out.

Where we come to you

Sources

Page last updated November 14, 2026.