Locked Keys in the Trunk: What to Do and Which Options Fit Your Car
The short answer
If your keys are locked in the trunk, the fastest fix is usually a spare key or a remote unlock through the manufacturer's connected-car app, if your vehicle supports one and the service is active. If neither is available, the next steps depend on one key question: is the passenger cabin locked or unlocked? An open cabin often lets you reach the trunk through an interior trunk release or fold-down rear seats. A fully locked car generally calls for roadside assistance, a qualified automotive locksmith or the dealer.
What works for your car depends on its body style, model year, trim and features, so treat the options below as general guidance and confirm details in your owner's manual or with the manufacturer.
First check: can it actually happen on your car?
Many vehicles with keyless entry (a key fob that the car detects nearby without pressing a button) are designed to sense when the fob is inside the trunk and may refuse to latch the trunk or may reopen it. This behavior varies by manufacturer and model, and it is not guaranteed. A weak fob battery, signal interference or a fob tucked inside metal or bulky items can prevent detection. Older vehicles and those with traditional keys generally have no such safeguard.
If the cabin is unlocked
Look for a trunk release button or lever inside the cabin, often near the driver's left knee, on the driver's door or on the floor beside the driver's seat. Some releases only work when the ignition is on, which may not be possible without the key. Try the trunk button on the dashboard or the vehicle's touchscreen menu, if equipped. Check whether the rear seatbacks fold down from inside the cabin. Some cars have pull tabs or straps at the top of the seatbacks; others place the release levers inside the trunk, which makes this route unavailable. Look for a center pass-through (sometimes behind the rear armrest) that may give enough access to reach small items. In hatchbacks, wagons and SUVs, the cargo area is typically open to the cabin, so you can often reach the keys by climbing over or folding the rear seats.
If the whole car is locked
Use a spare key or spare fob. If someone else has it, having them bring it is usually the least costly and least risky option. Use a manufacturer app or connected service that offers remote unlock. This typically requires the account to be set up in advance and, on many vehicles, an active subscription. Call roadside assistance. Coverage may come from your auto insurance policy, an auto club membership, a credit card benefit or a manufacturer roadside program that often accompanies new-vehicle warranties. Check your own policy for what lockout service includes. Contact an automotive locksmith. Ask whether they handle your make and model and whether they can open the vehicle without damage. Contact a dealer. A dealer can often cut and program a replacement key from the vehicle identification number (VIN) with proof of ownership, but this usually takes longer and costs more than a lockout service, and modern keys with transponder chips require programming to start the car.
What to avoid
Avoid prying at doors or using a slim jim, a thin metal tool once common for unlocking cars. Modern doors contain wiring, side-impact sensors and sometimes airbag components that can be damaged. Breaking a window should be a last resort reserved for genuine emergencies, such as a child or pet trapped inside in dangerous conditions; in that case, call emergency services first.
Don't count on the trunk lock or the hidden key blade
Many modern cars have no external keyhole on the trunk lid, so there may be no mechanical way in from the outside. Many key fobs also contain a hidden mechanical key blade for emergencies, but that does not help when the fob itself is in the trunk.
A note on the interior trunk release
US passenger cars with trunks are equipped with a glow-in-the-dark emergency release inside the trunk so a person trapped inside can open it. It is designed for escape from inside, not for retrieving keys from outside the car.
Preventing a repeat
Keep a spare key in a secure place or with a trusted person, not hidden on the car. Set up the manufacturer's app and any remote unlock features before you need them. Confirm what lockout coverage your insurance, auto club or warranty provides. Replace a weak fob battery promptly, especially if your car relies on fob detection to prevent trunk lockouts.
Gaps in this guide
No verified data was available on specific models, service prices, response times or subscription terms. Which interior releases, seat-folding mechanisms and remote features your car has depends on its make, model year and trim, so your owner's manual and the manufacturer or dealer are the authoritative sources for your vehicle.
