What to Do If You Lose Your Car Keys

Losing your car keys is one of those situations that goes from mild irritation to genuine stress surprisingly fast. One moment you are reaching into your pocket or bag. The next, nothing. The feeling is familiar to most drivers — and the good news is that it is almost always resolvable, usually the same day, without a main dealer booking or a recovery truck.

This guide covers exactly what to do, in the right order, from the moment you realise the keys are gone.

Step 1: Stop and Search Properly Before Doing Anything Else

This sounds obvious, but it is worth doing methodically before making any calls. Keys have a way of turning up in places that make no immediate sense. Check these before assuming the worst:

Every pocket you were wearing, including inside pockets and jacket linings
Between and under sofa cushions if you were recently at home
The ignition — especially if you have more than one vehicle
Coat pockets from the previous day or week
Surfaces at any location you visited in the past few hours
Your bag lining — keys fall through tears in the fabric regularly

If you were out somewhere — a pub, restaurant, shop or gym — call them. Keys handed in at a counter tend to stay there. Most businesses keep found keys for several days.

If you have a keyring tracker such as an Apple AirTag or Tile, check the app immediately. These are increasingly common and can pinpoint a key’s last known location before the battery ran out.

Step 2: Accept That the Key Is Gone and Understand Your Options

If a thorough search has not produced the key, move on. Time spent searching past a reasonable point is more expensive than the resolution. You have three realistic options.

Option A: Call Your Breakdown Provider

The AA and RAC both offer key assistance as part of some membership tiers. If you have breakdown cover, call your provider first and ask whether lost-key assistance is included. Some policies cover the cost of a locksmith or key replacement; others will arrange recovery to a dealer.

Check your policy before calling. If lost-key assistance is included, use it. If not — or if the wait time is significant — an independent auto locksmith is almost always faster and less expensive.

Option B: Call a Specialist Auto Locksmith

An IMI-qualified mobile auto locksmith carries the diagnostic and programming equipment to cut and programme a replacement key at your vehicle — wherever it is. No towing required, no dealer booking, no waiting for an appointment window. The locksmith comes to you.

For most common makes and models, a mobile auto locksmith can programme a fully working replacement key at your location within 30 to 75 minutes of arrival. For more complex key systems — such as the BMW CAS module on E-series cars or the Land Rover KVM module on the Defender L663 — the process takes longer but is still carried out at your vehicle. This is almost always faster than a dealer route.

Option C: Contact Your Main Dealer

A main dealer can replace and programme a key for your vehicle using manufacturer OBD diagnostic equipment. However, the dealer route typically involves:

A booking slot that may be 5 to 14 days away
Requiring the vehicle to be present at the dealership — meaning recovery if it is stranded
Significantly higher labour rates than an independent specialist
Proof of ownership documents required before they begin

If your vehicle is under warranty and key replacement is covered, or if your insurance covers the cost, the dealer route may be appropriate. In most situations, it is not the fastest or most cost-effective option.

Step 3: Gather This Information Before You Call

Whether you are calling a breakdown provider, a locksmith or a dealer, having the following ready speeds everything up considerably.

Your Vehicle Details

Make, model and year of manufacture
Registration plate
Fuel type (petrol, diesel, hybrid, electric)

Your Key Situation

How many keys does the vehicle currently have? Zero means all-keys-lost programming — a different process with different equipment requirements
What type of key is it? Blade key, flip key, remote fob, or push-button smart key?

Your Location

Exact street address, postcode, car park name or nearest landmark
Whether the vehicle is accessible (not in a restricted multi-storey, for example)

Step 4: Confirm the Price Before the Locksmith Travels

A reputable mobile auto locksmith will give you a fixed price on the phone — before they set off. This is the professional standard. If a locksmith refuses to quote a price until they arrive at the vehicle, treat that as a warning sign.

The price should cover everything: the visit itself (no separate call-out fee), all labour, the key blank and programming, and testing before they leave. There should be no additions for out-of-hours calls, specific makes, or being in a car park rather than on a residential street.

What Happens When the Locksmith Arrives

A professional mobile auto locksmith follows a consistent process at your vehicle.

1. Identity Verification

Before any programming begins, a professional will verify that you are the registered owner or authorised user. The DVLA vehicle information check can confirm registration details. You may be asked to show a driving licence, V5C logbook or insurance documents. This is a legal requirement — do not use any locksmith who skips this step.

2. Blade Cutting (Where Applicable)

For blade-and-transponder keys, the locksmith uses a mobile key cutting machine to cut a new blade to your vehicle’s specific profile. Common profiles include HU101 (Ford and Land Rover Freelander 2), HU162T (VW, Audi, SEAT and Škoda post-2013), HU92 (BMW E-series) and TOY43 (Toyota). For smart key and proximity key systems, no physical blade cutting is needed.

3. OBD Programming

The locksmith connects to your vehicle’s OBD2 port using brand-specific diagnostic equipment. The new key’s transponder chip — or the smart key’s rolling code credential — is programmed to your vehicle’s immobiliser ECU or Body Control Module. For all-keys-lost situations, an all-keys-delete sequence first clears any previously recorded credentials before the new key is added.

4. Full Testing

A professional will not leave until the key is fully tested — door lock, boot, central locking remote and ignition (or push-button start). If anything is not working correctly, they resolve it before asking for payment.

5. Payment on Completion

Payment is taken after the key is working, not before. If a locksmith asks for payment upfront, consider that a concern.

Does Your Car Make Affect What’s Involved?

Yes — significantly. The key system your vehicle uses depends on the manufacturer, model and year. Here is a brief summary of the most common makes we cover across Exeter and Devon:

Ford — PATS immobiliser across five generations. Most common profiles: HU101 and Tibbe. Ford Transit van all-keys-lost is one of our most frequent callouts across Devon’s trade sector.
Volkswagen — VAG IMMO system. HU66 on older models, HU162T on MQB platform (Golf MK7+, Polo MK6). MQB key sync faults are common after a flat battery or battery change.
Vauxhall — GM IMMO platform on pre-2019 models. PSA/Stellantis BSI module on 2019+ models including Corsa F and Astra L.
Toyota — Toyota TPMS. TOY43 blade on most models. Smart key (PEPS) on post-2018 Yaris MK4, RAV4 MK5 and C-HR.
BMW — Three generations: EWS on older E-series, CAS module on E87, E90 and E60, FEM/BDC on F-series. G-series uses BDC2 with Comfort Access smart key.
Mercedes-Benz — HU64 blade across most models. W204/W212 EZS fault is a known hardware issue (the module, not the key, fails). Sprinter van all-keys-lost is the most frequent commercial Mercedes callout we attend.
Audi — VAG group. MQB platform (A3 8V/8Y, Q3, TT 8S) and MLB platform (A4 B9, A6, Q5, Q7, R8) use completely different OBD protocols — the correct equipment for one will not work on the other.
Land Rover — Ford PATS/HU101 on Freelander 2 and Discovery 3/4. JLR KESSY on Range Rover L405 and RR Sport L494. KVM module on Defender L663 is the most complex current Land Rover key system.

We cover all car brands listed on our brands page — including Nissan, Kia, Hyundai, Renault, Peugeot, Citroën, SEAT, Škoda, Jaguar, Volvo, MINI, Mazda and more.

Get a Spare Key Now to Prevent This Happening Again

The single most effective way to avoid a lost-key situation becoming a major problem in future is to have a spare key programmed now.

A spare key cut and programmed at the same time as a replacement key costs significantly less than an all-keys-lost job further down the line. Most drivers have one working key and assume that is sufficient. The cost of adding a second is modest; the cost of losing the only key is substantially higher.

Spare car key cutting and programming is one of our most commonly requested services — and one of the most cost-effective decisions you can make after resolving a lost-key situation.

Where We Cover in Exeter and Devon

We come to your vehicle wherever it is parked. Residential driveway, supermarket car park, Devon country lane or trade premises — we attend.

See our full areas covered page for the complete coverage map.

Frequently Asked Questions

Can I still drive my car if I’ve lost one key but have another?

Yes — if you still have one working key, the car is fully functional. The lost key is primarily a security concern if it went missing somewhere linked to your vehicle. In that situation, consider having the lost key’s credential deleted from the vehicle’s immobiliser and a new spare programmed. We can carry this out at your location.

What if I’ve lost all my car keys?

All-keys-lost programming is a service we carry out regularly. It requires a different process from adding a key when a working key is present — we programme the new key directly from the vehicle’s ECU via OBD without needing an existing key. For some newer makes with advanced security, the method differs slightly. Call us with your make, model and year and we will confirm the method and give you a fixed price.

Do I need to report a lost car key to my insurer?

Not necessarily. A lost key is not itself an insurance event unless the vehicle is subsequently broken into or stolen. However, many insurance policies include key cover as a standard or optional add-on — check your policy documents before calling your insurer, as a lost key may be a qualifying claim.

Do you come out of hours for lost car keys?

Yes — we operate 24 hours a day, seven days a week including bank holidays. The same fixed price applies regardless of the time. There is no out-of-hours surcharge. See our 24-hour auto locksmith service for more detail.

How can I avoid losing my keys again?

Three practical measures help significantly:

Have a spare key programmed — the most important step
Fit a keyring tracker such as an Apple AirTag or Tile Mate to your keyring
Keep your vehicle’s registration plate, make and model noted in your wallet — this speeds up any locksmith or breakdown call considerably

Call Us Now — 01392 925673

Available 24 hours. Tell us your make, model and location. We give you a fixed price before we travel and come directly to your vehicle — no call-out fee, no recovery needed.