en
0

Shopping Cart

closeCart
€0.00

How to Protect Your Car Key Fob from Relay Attacks

  • /
  • Blog
  • /
  • How to Protect Your Car Key Fob from Relay Attacks
Post Name
25.04.2025

Car theft has entered the digital age — and unfortunately, so have the thieves. As car manufacturers move toward keyless technology, a new type of threat has emerged: the relay attack. Unlike traditional break-ins, this high-tech method allows criminals to steal a vehicle without touching the keys — or even breaking a window.

Imagine this: your car is parked safely outside your house. Your key fob is inside, hanging on a hook by the front door. You're fast asleep. But outside, two individuals with small electronic devices are working together. One stands near your front door, scanning for a signal from your key fob. The other waits by your car. Within seconds, your key’s signal is captured, extended, and transmitted to your car. It unlocks, starts, and drives away — and you might not notice until morning.

This is not science fiction. It's called a relay attack, and it's one of the fastest-growing vehicle theft methods worldwide.

Why Relay Attacks Are So Effective

The key to this technique is exploiting the constant communication between your car and its fob. Most keyless entry systems are designed for convenience — you don’t even need to press a button. The car automatically detects the presence of the key fob and unlocks when you approach.

This convenience is exactly what makes it vulnerable. Relay devices — which are cheap, portable, and easy to use — can mimic the signal and trick the car into thinking the key is nearby, even when it’s inside your home.

Security experts have raised the alarm about this method for years, but many drivers still don’t realize how easily their vehicles can be accessed. In the UK alone, keyless car theft now accounts for more than 90% of vehicle thefts involving high-end models, according to the AA. And with the rise of online tutorials and black-market tools, the problem is growing globally.

So, What Can You Do to Stay Safe?

Fortunately, protecting your vehicle doesn’t require advanced tech or a huge investment — just awareness and a few smart habits.

One of the most effective ways to block relay attacks is also the simplest: store your keys in a signal-blocking container. Often called a Faraday pouch or Faraday box, this lined case prevents radio signals from escaping. When your keys are stored inside, they can’t be scanned or cloned, no matter how close a thief gets to your home.

Placement also matters. Many drivers leave their keys near the front door or on an entryway table — spots that are easy to access from outside. Moving your keys to the center of your home, an upper floor, or even a metal box can reduce signal exposure dramatically.

Some newer key fobs allow you to manually disable the signal when it’s not in use. This feature is often hidden in the manual and rarely mentioned by dealers. Taking a moment to learn whether your key supports this — and how to activate it — can make a big difference.

It’s also worth checking whether your vehicle’s software is up to date. Many automakers periodically release firmware updates that strengthen encryption or reduce signal range. In some cases, updates can even detect and block suspicious unlock attempts.

And while it may seem old-fashioned, physical security still works. Devices like steering wheel locks or gear shift immobilisers can be powerful visual deterrents. Even if a thief manages to unlock your vehicle, the sight of a bulky lock inside may be enough to send them looking for an easier target.

If you're looking for practical solutions beyond GPS, check out our blog: Do Car Keys Have GPS? What You Need to Know About Key Tracking.

In summary, here are a few key takeaways to keep your keys and vehicle safer:

Store your fob in a signal-blocking pouch or metal container

Keep keys away from entry points like doors or windows

Disable keyless signals if your fob supports it

Update your car’s firmware regularly

Use visible anti-theft devices as a deterrent

Looking Ahead: Smarter Cars, Smarter Drivers

Relay attacks are part of a larger trend — one where modern technology makes life more convenient, but also creates new risks. Just like we’ve learned to secure our phones and passwords, we now need to think about how we secure our vehicles.

As carmakers explore more secure solutions — like Ultra Wideband (UWB) tech and biometric verification — drivers still need to take responsibility for their vehicle’s safety. The tools are already out there, and many of them cost less than a meal out. It’s not just about avoiding theft; it’s about peace of mind.

So next time you get home, before tossing your keys on the hallway table, take a second to think: are they really safe there?

Related Posts

Inside a Key Rescue: How to Salvage a Wet or Flooded Car Key
10.07.2025

Inside a Key Rescue: How to Salvage a Wet or Flooded Car Key

Water damage is one of the most common – and most stressful – problems car key owners face. Whether your key fell into a puddle, went through the wash, or was simply caught in a downpour, it can stop working in an instant. But does water exposure always mean you need to buy a new key? Not necessarily. In many cases, a quick and proper response can save your key, restore its function, and spare you an expensive replacement. This guide walks you through how to rescue a wet or flooded car key, what not to do, and how to know when it’s beyond repair. How Car Keys Get Wet Modern car keys, especially keyless remotes and fobs, aren’t designed to be waterproof. Even small amounts of moisture can cause damage if the internal components are exposed. Some of the most common causes of water-damaged keys include: Being left in clothing and run through the washing machine Falling into sinks, toilets, or puddles Exposure to rain, snow, or slush Dropped at the beach or near pools Stored in damp gym bags or jackets Once water enters the key shell, it can corrode the circuit board, damage the battery, or short-circuit the transponder chip. What to Do Immediately After Getting Your Key Wet The first few minutes after exposure are critical. Acting quickly can mean the difference between a working key and a dead one. 1. Remove the Key from the Water Take the key out of the water as quickly as possible. The longer it sits, the more damage can occur inside. 2. Open the Key Shell If your key has a removable shell, gently open it using a small screwdriver or plastic tool. This allows you to access the internal parts and dry them properly. If you’re unsure how to open it, look up a video or guide specific to your car model. 3. Take Out the Battery Immediately remove the battery. A wet battery in contact with electronics can cause short circuits and corrosion. Do not reinstall the same battery later; it may be compromised. 4. Dry the Internal Components Gently pat all visible parts dry with a lint-free cloth. Do not use paper towels, as they can leave behind fibers. Then allow the key to air-dry using one of the following methods: Option A: Use Silica Gel or Desiccant Packs Place the opened key and all components in an airtight container with silica gel packets. Leave it sealed for at least 24 to 48 hours. Option B: Use Uncooked Rice If silica gel isn’t available, uncooked rice can work as an alternative. Place the key in a bowl of rice and cover it completely. Leave it for 2 to 3 days. Do not use a hair dryer, microwave, or place the key near a heater. High heat can warp the plastic shell and damage sensitive electronics. After Drying: Will the Key Work Again? After a full drying period, insert a new battery and test the key. In many cases, it will begin working again — especially if water exposure was brief and the board was not damaged. If the key still doesn’t respond, try the following steps: Inspect the circuit board for corrosion or residue Try replacing the outer shell if buttons feel worn or unresponsive Check if the vehicle recognizes the transponder chip If none of these steps work, the internal chip or electronics may be permanently damaged. When to Replace the Key Sometimes the damage goes beyond what cleaning and drying can fix. You’ll likely need a full replacement if: The key no longer sends a signal The LED light doesn’t flash when pressing buttons There is visible corrosion on the circuit board The transponder chip fails to communicate with the vehicle Buttons are physically damaged or unresponsive The key was underwater for an extended time In these situations, replacing the key is often the most reliable solution. Don’t Wait Until It’s Too Late – Keep a Spare Key If you’ve experienced water damage once, there’s a good chance it could happen again. Keeping a backup key stored in a safe, dry location is one of the best precautions you can take. You can find replacement key shells, blades, batteries, and fully programmed keys for most vehicle brands at mr-key.com . Investing in a spare can save time, money, and stress. Final Tips for Car Key Water Damage Act fast and remove the battery as soon as possible Use silica gel or rice for slow, safe drying Avoid heat, rubbing, or shaking the electronics Replace the shell if it’s worn, cracked, or damaged If in doubt, test with a new battery before replacing the entire key Need Replacement Parts? Whether you need a new shell, battery, or a complete key, visit mr-key.com to find compatible parts for a wide range of vehicles. Our selection includes: Key shells for all major brands CR2032 batteries Key blades and electronics Fully assembled remote keys with chip and programming options If your key has been exposed to water, don’t panic. With the right steps, many keys can be rescued — and if not, we’re here to help you find the right replacement.

Lost Your Motorcycle Key? Here's What To Do
21.11.2025

Lost Your Motorcycle Key? Here's What To Do

Losing your motorcycle key is stressful, but the solution is almost always simpler than riders think. Whether you’re dealing with a chipped key, a worn ignition, or a code you can’t find, there are clear steps you can follow to get back on the road fast. This guide explains how replacement motorcycle keys really work — from cutting and key codes to immobilizer compatibility — with examples from real motorcycle brands and models. What to Do First When You Lose Your Motorcycle Key Act quickly but stay calm. Most motorcycles can be re-keyed or cut from code without replacing expensive parts. Check for the key code. Look for a small alphanumeric code stamped on the ignition, seat lock, fuel cap, or original key tag. If available, a new key can be cut in minutes. Confirm your key type. Bikes like the BMW C600 Sport, C650GT, G310R , Suzuki Boulevard , Yamaha YZF-R1 , or Honda CB/CBR/CRF may use different blanks, cuts, or chips. Decide between a dealer or emergency locksmith. Dealers rely on VIN lookups but may take days or weeks. A locksmith can often produce a working key on-site. If the key was stolen, secure the bike. A locksmith can re-key the ignition or erase the lost transponder from your system. Cutting a New Motorcycle Key: How It Actually Works Motorcycle keys fall into three categories: mechanical , transponder (chipped) , and keyless fobs . Replacing them works differently for each. Mechanical Keys (most Honda, Yamaha, older Suzuki, Vespa, Piaggio) These are simple metal keys. They can be cut even if you lost the original — locksmiths read the code or decode the lock. Examples from your catalogue with mechanical key options: Honda : CB Series, CBR Series, CRF, FourTrax, Goldwing, XR/XL Yamaha : YZF-R1, YZF-R6, XJR400, FJR1300, SR400 Suzuki : Boulevard (S40/S50), Intruder (700/750/800/1400), Madura, Savage Vespa / Aprilia / Ducati / Piaggio : ZADI key ranges C5001–C6475 These can be cut to code and shipped via replacement key delivery . Transponder Keys (chipped) Modern bikes often use embedded RFID chips. A new key must be: Cut to the correct mechanical pattern Programmed to the bike’s immobilizer or ECU Examples with chip or immobilizer systems: Suzuki models using 4D60 DST40 chips Indian / KTM / Honda ZADI-system motorcycles Newer BMW Motorrad models A dealer or well-equipped locksmith can program transponder keys. Many quoted ECU replacements are unnecessary — a good locksmith can usually pair a new chip directly. Keyless Fobs Some Harley-Davidson and BMW models use proximity fobs. Losing one often immobilizes the bike entirely. Replacements require programming, and towing may be necessary. Examples from your listings: Harley-Davidson saddlebag and fob-linked models (LL226–LL450 range) BMW keyless systems on touring and maxi-scooter models Where Key Codes Are Found (and Why They Matter) Key codes are the fastest, cheapest way to get a replacement key. They define the exact cut pattern. Common key code locations: Ignition barrel underside Seat or helmet lock Fuel cap inner plate Owner’s manual or original key tag ZADI-based systems (used by Vespa, Aprilia, Ducati, Piaggio, Indian, KTM ) typically use numeric ranges like C5001–C6475 , which Mr-Key can cut perfectly. If no code is present, a locksmith can decode the lock manually — no need for new hardware. Dealer vs. Emergency Locksmith: Which Is Better? Dealers Can order keys by VIN Often slow and expensive May insist on full ignition or ECU replacement Useful for rare models or restricted fobs Emergency Locksmiths Faster and mobile Cheaper than dealerships Can cut by code, impression, or lock decoding Can program many transponders without ECU replacement For many riders — especially with models like Honda CB/CBR , Yamaha YZF , Suzuki Intruder , BMW G310R , Vespa/Aprilia/Piaggio — locksmiths are the most efficient choice. Examples of Motorcycles Mr-Key Supports BMW C600 Sport C650GT G310R Honda CB Series CBR Series CRF Series FourTrax Goldwing XR / XL Honda ATV (A00–A99 / B00–B99 codes, 1983–2022) Yamaha YZF-R1 YZF-R6 XJR400 FJR1300 SR400 Suzuki Boulevard S40 / S50 Intruder 700 / 750 / 800 / 1400 Madura Savage 4D60 DST40 transponder models Harley-Davidson Saddle Bag LL226–LL450 Keyless fob models Vespa / Aprilia / Ducati / Piaggio ZADI key codes C5001–C6475 Multiple standard ignition and seat locks KTM / Indian Supported in ZADI Indian/Vespa/KTM/Honda product line How to Avoid Losing Your Key Again Make a spare immediately and store it safely. Add a bright keychain or Bluetooth tracker. Know your emergency start PIN (for keyless bikes). Keep your key code and VIN stored separately from the bike. The AA advises riders to secure spares and document key numbers. FAQ Can a locksmith make a motorcycle key without the original? Yes. Locksmiths can cut by code or decode your ignition/lock manually. Can I get a new key using my motorcycle’s VIN? Dealers can often retrieve the factory key code from the VIN, though delays are common. What if my lost key had a chip? You’ll need both cutting and immobilizer programming. Locksmiths handle this for most brands. Do I need to replace the ignition? Rarely. Only if the key was stolen and security is compromised — not because the key is lost. Need a Replacement Motorcycle Key Fast? If you need a mechanical, transponder, or ZADI-system motorcycle key — or a code-cut replacement delivered to your home — we specialize in fast, professional solutions. Visit our shop at mr-key.com to order a replacement key or request an emergency locksmith.

Why Your Car Remote Isn’t Working and How to Fix It
07.01.2025

Why Your Car Remote Isn’t Working and How to Fix It

Car remotes have become an essential part of modern vehicle ownership, offering convenience and added security. However, when they stop working, it can lead to frustration and delays. If you’ve ever faced a malfunctioning car remote, don’t worry—you’re not alone. Here’s a guide to help you understand the common reasons why your car remote might fail and how you can fix the issue quickly and affordably. 1. Dead Battery: The Usual Suspect One of the most common reasons for a non-functional car remote is a dead battery. Over time, the small coin batteries in your remote lose their charge, making the remote unusable. Signs of a Dead Battery: Reduced range, inconsistent functionality, or complete failure to respond. How to Fix It: Replace the battery with a compatible CR-type coin battery. Check your car manual or the remote’s casing for the correct battery type. Pro Tip: Always keep a spare battery in your glove compartment to avoid getting stranded. 2. Signal Interference: The Invisible Barrier Signal interference can block communication between your remote and your car. This can happen in areas with high electromagnetic activity or if the remote’s signal is weakened. Common Causes: Proximity to cell towers, Wi-Fi routers, or even other key fobs . How to Resolve It: Move closer to your car and try again. Change your location if you’re in a crowded parking area. Keep your remote away from other electronic devices that might cause interference. Prevention Tip: Avoid storing your car remote near electronics when not in use. 3. Remote Needs Reprogramming Sometimes, a car remote loses its programming, which is essential for communicating with your car. This can happen after battery replacement, electrical system resets, or software glitches. Signs Your Remote Needs Reprogramming: The buttons don’t respond, or the remote only works intermittently. What You Can Do: Check your car manual for DIY reprogramming instructions. If DIY methods fail, consult a professional locksmith or your car dealer for assistance. Pro Tip: Always reprogram your remote immediately after replacing its battery to avoid compatibility issues. 4. Physical Damage: More Than Just Wear and Tear Daily use, accidental drops, or exposure to moisture can damage your car remote, leading to malfunction. The internal components, such as the circuit board, are particularly sensitive. Signs of Damage: Cracks on the casing, loose buttons, or water ingress. How to Address It: For minor issues, replace the remote casing or repair loose buttons. If the circuit board is damaged, you’ll need a replacement remote. Preventative Measures: Use a protective key cover to shield your remote from damage. Keep your remote away from water and extreme temperatures. 5. Faulty Car Receiver: The Problem Isn’t Always the Remote In some cases, the issue lies with your car’s receiver rather than the remote. If the receiver is damaged or malfunctioning, it won’t recognize signals from the remote. How to Diagnose: If multiple remotes fail to work with the same car, the receiver might be the issue. Test your remote on a similar vehicle, if possible, to rule out the remote as the problem. How to Fix It: Consult a professional mechanic to inspect and repair the car’s receiver system. General Tips to Keep Your Car Remote Functional Prevention is better than cure, especially when it comes to car remotes. Here are some tips to avoid future issues: Regular Maintenance: Inspect your remote periodically for wear and tear. Store It Safely: Keep your remote in a safe, dry place to avoid accidental damage. Backup Plan: Always have a spare key or remote handy for emergencies. Invest in a Tracker: Attach a Bluetooth tracker to your remote for easy location if it gets misplaced. When to Seek Professional Help While many car remote issues can be resolved with DIY methods, some problems require professional assistance. If your remote still doesn’t work after troubleshooting, consult a locksmith or an automotive specialist. They can help with repairs, replacements, and reprogramming at an affordable cost. Don’t Let a Faulty Remote Slow You Down A malfunctioning car remote can be a hassle, but most issues are fixable with a little know-how. Whether it’s a dead battery, signal interference, or physical damage, understanding the root cause will help you resolve the problem efficiently. With proper care and maintenance, your car remote will continue to offer the convenience and security you rely on every day.

What to Do If You Lose Your Car Keys While Travelling?
10.11.2025

What to Do If You Lose Your Car Keys While Travelling?

1. Why this happens and why you must act fast Losing car keys while travelling is more common than you might assume. Whether it’s slipping out of a beach bag, leaving them at a café or dropping in transit, your vehicle becomes vulnerable. In addition, modern keys increasingly contain electronic transponders , chips or fobs—meaning replacement cost and complexity shoot up. When you’re away from home, both the stress and the stakes increase: you may face towing, expensive replacements or worse — being stranded. The sooner you act the less time you give for theft, theft-of-opportunity or further cost escalation. 2. Immediate steps when you realise your keys are missing a) Stay calm and retrace your steps Start by pausing. Panic hampers clear thinking. Consider the last time you remember using your keys: in the car, on unloading luggage, at hotel reception. Retrace your route slowly. As RAC advise, this step often resolves the problem without cost. b) Search systematically Check all pockets, bags, seats, coat hangers, beach bags, under cushions, in and around your car. If you’re staying somewhere temporarily, check hotel rooms, fuelling stations, parking lots. As one travel-site suggests: “Go through all your pockets… look around all surfaces in your hotel room”. c) Contact places you visited Call restaurants, cafés, shops, airport parking or hotels where you parked the vehicle. Key finders are often handed in. d) Assess risk of theft If you suspect the keys were stolen (pick-pocket, hotel burglary or unattended vehicle) you should alert local police and your insurance provider—once a key is missing, your vehicle security is compromised. e) Secure the vehicle If the vehicle is parked in an insecure location, consider moving it (if possible) or arranging towing. Leaving it locked but unattended increases theft risk. 3. How to use replacement key delivery services Replacement key delivery refers to services that cut and program a new car key and deliver it (or have it fitted) to your location—whether your holiday base, airport car park or home driveway. Steps to follow: Have vehicle details ready: make, model, year, registration number, VIN if available. Choose service: For UK and travel users, many auto-locksmiths offer mobile services that come to you. Confirm delivery logistics: Where is the vehicle parked? Will you be present when the key is delivered or fitted? If abroad, is the company able to support your location? Understand key type: Basic mechanical, transponder chip key, keyless fob—all vary in price and logistics. Check old key de-activation: A top provider will delete the lost key’s code so it cannot be used in future—critical for security. Why this is often your best path while travelling Going via your vehicle manufacturer dealer is often slower and pricier — as UK guide notes: “The quickest and least expensive way … is via an auto locksmith.” In a foreign locale, a mobile specialist or key-delivery service saves towing the vehicle and waiting for factory part shipment. 4. Hiring an emergency locksmith: what to look for When you’re locked out or stranded, an emergency locksmith (24-hour) can be your lifeline. But not all are equal. Checklist: Confirm they specialise in auto locksmith / car key replacement , not just domestic locks. Ask for credentials (affiliation with industry body). Insist on proof they will delete/pair the key to your vehicle (so lost key becomes useless). Understand travel/overseas call-out charges. Before arrival, ask for an estimate and payment process (card, cash etc.). Some holiday locales only accept cash. Stay with your vehicle in a safe public place. If you are on a remote vacation site, move to well-lit area before the locksmith arrives. Typical process: The locksmith arrives, verifies ownership (ID + logbook/V5C). They cut and/or program a key, or fix the lock/immobiliser if required. You pay for service and receive the new key — vehicle is back on the road. 5. Insurance, roadside cover and overseas travel issues Insurance/key cover Do you have lost key cover? Most UK car insurance policies don’t include lost keys as standard. You might need a premium add-on. If you claim, your no-claims bonus may be affected. Breakdown/roadside assistance Your breakdown provider (e.g., Motorway or RAC ) may offer key services, but often their vans don’t carry full key-programming equipment. So an auto locksmith still may be needed. Travelling abroad Check if your insurance/cover extends to the country you’re in. Confirm language support and local currency charges with any service you call. If you rented the car: contact the rental company immediately — they may have specific protocols for lost keys (often expensive). 6. Special cases: rental vehicles, keyless entry & fobs Rental vehicles When you lose the keys to a hire car abroad, you are likely to be liable for high fees. Rental companies will likely charge for towing and replacement, not just the locksmith. According to travel forums: “We do not offer coverage for lost keys… The replacement fee of $125 for lost key.” Call the rental agency, follow their instructions, and keep all receipts. Keyless / smart keys & modern cars Most vehicles since 2000 use transponder chips or keyless systems. Replacement these can cost several hundred pounds—UK guides show typical range from £100–£300 or more depending on brand. When you lose a keyless fob, you may need the original still in possession or need the vehicle brought to the dealer. Factor this potential delay into your travel plans. Single key left If you only have one remaining key, treat it as your last key. Get a spare made ASAP once you’re home so you’re not in the same situation again. 7. Preventative measures for your next trip Always carry a spare key at home or with a trusted person. Use a tracker (such as an AirTag or Bluetooth key-tracker) on your keyring. UK blogs suggest this simple tech helps locate lost keys. Establish a routine spot where you place your keys at the start of every journey. If you have old keys (house + car), don’t mix them during travel. Note down your vehicle details (make, model, registration, VIN) in your phone before travelling—so you’re ready if you need a replacement. For holiday car hire, take a photo of the key and keep the rental company’s emergency phone number saved. FAQ Q: What happens if I lose my only car key and I’m abroad? A: You’ll need to contact an auto locksmith or dealer who can cut and program a new key. Have vehicle details ready. Expect cost and waiting time to increase since you have no spare. Q: Can I just use a dealer to replace the key? A: Yes, but often it’s slower and more expensive . UK guides claim mobile auto locksmiths are typically faster and cheaper. Q: How long does replacement take? A: For many modern cars, the physical key can be cut quickly, but programming and blank arrival may take days. Dealers might take up to weeks. Q: Will my car insurance cover a lost key? A: Only if you have key-cover added or your insurance includes it—not standard. Check your policy. Claiming may affect your no-claims status. Q: What should I do if I lose the key and my car is locked in a remote place? A: First make sure you are safe. Then use your breakdown/roadside cover to move the vehicle to a safe area if needed. Then call an emergency auto locksmith to attend and provide a replacement. Need a reliable solution now? Visit our shop at mr-key.com to discover how we can cut and deliver replacement car keys swiftly—even when you’re travelling.

Logo
More options Accept all Reject all
This website uses cookies

We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners who may combine it with other information that you’ve provided to them or that they’ve collected from your use of their services.

Chat with us