Where to store your spare keyless car key at home

Store a spare keyless car fob as carefully as your everyday key: away from the car, exterior doors and windows, inside a fully closed signal-blocking case intended for that fob. Not using a spare does not establish that its radio function is switched off.

A useful arrangement starts with household habits: how many keys exist, where each returns after a trip and who checks that its case is closed. An RFID or Faraday car-key case is useful when used consistently rather than left empty in a drawer.

Account for every key first

Count the physical fobs belonging to the vehicle. Include another driver's key, a rarely used spare and keys supplied by a previous owner. Phone-based digital keys are separate: enclosing a physical fob does not affect them.

After buying a used vehicle, check how many keys remain registered to it. If some were not handed over, discuss removal or reprogramming with the vehicle representative or a qualified specialist. A pouch in your drawer cannot protect against a working key held somewhere else.

A simple household list is enough; it needs no passwords or sensitive vehicle information. Its purpose is to give the second key a consistent home. Do not display the list beside an entrance or label the outside of the case with unnecessary vehicle details.

Choose a consistent place at home

A hook beside the front door is convenient, but not a good starting point for key storage. Choose somewhere farther from the vehicle, exterior doors and windows. Police advice combines sensible location with a shielding pouch, so use the measures together.

There is no universal number of metres that guarantees security in every home. Vehicle position, walls and key systems differ. A repeatable routine and completely closed case are more useful than guessing that a key is far enough away.

Keep the spare where you can find it when needed, rather than on a visible shelf beside a window. Avoid storing it with a note identifying the vehicle's location. If several people use the keys, a clear agreement reduces the chance of one fob remaining unprotected inside a bag.

One shared case or separate cases?

A case can hold several keys only if all fit fully inside its shielding compartment and do not prevent correct closure. Being able to force the lid down is not sufficient. Rings and accessories must not protrude through the opening or stretch the lining.

Separate cases can simplify life for different drivers, while a spare stays at home. A larger shared storage option can suit one fixed location, but test it with the actual combination of keys you intend to keep inside. A larger exterior does not establish usable internal space.

For example, the Tech-Protect KLR400 listing gives overall dimensions of 12 × 9.6 cm. These do not confirm room for two thick fobs. The Wozinsky WBS-20 specifies an internal cavity of 1.8 × 8.6 × 4.5 cm, which you can compare with your measured key.

Agree a simple arrival routine

1. Check that the vehicle is locked before walking away.
2. At home, take the key out of your coat or bag and return it to the agreed place.
3. Use the correct compartment, keep accessories clear of the opening and close the case completely.
4. After lending or returning a key, confirm that the spare is back in its place.

This need not become an elaborate daily checklist. One consistent action on arrival is enough. A cramped case or awkward closure makes regular use harder, so ease of use and adequate space are practical selection criteria.

Before ordering, compare soft and rigid car-key cases, then follow our step-by-step Faraday pouch check when you start using them.

Periodically test the spare itself

Do not only check the everyday fob. Test each key separately: the car should recognise it without the case, while the tested passive function should stop working when it is enclosed correctly. Keep other physical and digital keys outside the test area.

If the spare battery is flat, failed unlocking does not demonstrate shielding. Check the key first. Record the test date rather than an imagined expiry date: condition and closure matter, not simply the passage of time.

Avoid improvised storage assumptions

Do not use a microwave oven as a key store; someone could accidentally operate the appliance. A refrigerator is not a key-storage solution either. An ordinary metal container should not be assumed to shield a fob simply because it is metal.

Remember the limits. A shielding case does not prevent physical key theft, disable a key held by someone else or replace the vehicle's security system. Different measures address different risks. Follow the vehicle manufacturer's information when choosing additional protection.

Frequently asked questions

Does a spare need protection if I never use it?

Yes. Lack of use does not establish that a keyless fob's radio function is off. Check the vehicle manual and arrange suitable storage.

Can both keys share one case?

Only if both fit fully inside the shielding compartment, allow complete closure and have been tested in that combination with the vehicle.

Is moving the key away from the door sufficient?

Distance helps, but there is no universal guaranteed distance. Police guidance also recommends a signal-blocking pouch.

Does a fob case protect a digital key on my phone?

No. The case only affects objects enclosed inside it. Manage phone-based key settings separately using the vehicle instructions.

Start by accounting for all keys and agreeing a convenient storage place. Then choose cases with adequate space and test each key separately.

Sources: PSNI: main and spare key storage; West Yorkshire Police: reprogramming and keyless security. Reviewed on 15 October 2026. The AI-generated cover illustrates a storage idea.