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

How to Program a Car Key: A Step-by-Step Guide
19.06.2024

How to Program a Car Key: A Step-by-Step Guide

Lost Your Car Key Programming? Here's What to Do Have you ever lost your car keys or found yourself with a spare key that doesn’t start your vehicle? While the process of programming a car key might seem intimidating, it’s often simpler than you’d expect. In many cases, car owners can program keys themselves without needing a visit to a dealership. This guide walks you through the essentials of car key programming, helping you save time, effort, and potentially a significant amount of money. Understanding Car Key Programming: The Basics Car key programming is the process of syncing a key with a car's internal computer so it can communicate securely. Modern vehicles use transponder keys or smart keys equipped with chips that emit a unique signal. Without proper programming, these keys won’t function, even if they fit perfectly into the ignition. While older mechanical keys didn’t require programming, today’s advanced systems add a layer of security, reducing the risk of car theft. However, this added sophistication means that replacing or reprogramming a key is no longer as simple as cutting a piece of metal. Quick Tip: Check your vehicle’s owner manual to see if programming your car key is a DIY-friendly process, as some models allow self-programming, while others require professional tools. Step-by-Step Guide to Programming a Car Key Before starting, ensure you have all necessary tools and information: The vehicle’s owner manual. All keys that need programming, including the functional ones. Step 1: Access Programming Mode Start by sitting in the driver’s seat with all the doors closed. Insert the already functional key into the ignition and turn it to the “on” position (do not start the engine). Some vehicles require you to cycle the key between “on” and “off” positions a specific number of times to enter programming mode. Step 2: Add the New Key Once in programming mode, remove the functional key and quickly insert the new key into the ignition. Turn it to the “on” position. The vehicle’s security light may flash to indicate the key has been successfully programmed. Step 3: Test the Key After programming, remove the new key and test it to ensure it can start the car and unlock the doors. Note: Each car manufacturer has unique programming steps. Be sure to consult your owner’s manual or the manufacturer’s website for specific instructions. When Professional Help Is Needed While many vehicles allow for DIY key programming, others require specialized equipment or software that only dealerships or locksmiths can access. This is particularly true for luxury or high-end cars with advanced encryption and security features. If your DIY efforts fail, it’s best to seek help from a certified professional. Visiting a dealership is a reliable, albeit more expensive, option. Alternatively, professional locksmiths often provide programming services at a lower cost, making them a practical choice for many drivers. Costs and Considerations The cost of programming a car key varies significantly based on the vehicle’s make and model. For basic models, self-programming might cost nothing if you already have a functional key. However, professional programming can range from $50 to $300 or more, especially for smart keys or proximity fobs. To minimize costs: Have a spare key : Always keep a functional spare to simplify programming if a replacement is needed. Research costs : Call local locksmiths or dealerships to compare pricing. Empower Yourself with Knowledge Programming a car key doesn’t have to be a daunting task. With the right tools and information, many car owners can handle the process themselves, saving time and money. However, it’s essential to recognize when professional assistance is necessary, particularly for complex key systems. By understanding the basics of car key programming and following a step-by-step approach, you can ensure your vehicle remains secure and functional. So, whether it’s a spare key or a replacement, you now have the confidence to tackle the task or know where to turn for help.

The Ultimate Guide to Car Key Replacement: What You Need to Know
16.04.2024

The Ultimate Guide to Car Key Replacement: What You Need to Know

Locked Out? Here’s What to Do Next Imagine this: you’re rushing to an important meeting or trying to get your kids to school, only to discover you’ve lost your car keys or locked them inside your vehicle. Panic sets in, and the inconvenience seems insurmountable. Losing or damaging your car keys is a frustrating, but surprisingly common problem. Luckily, car key replacement services are more advanced and accessible than ever. But where do you start? From understanding key types to navigating costs and services, this guide breaks down everything you need to know about car key replacement. Understanding Car Key Types: The First Step to Replacement Before diving into the replacement process, it’s essential to identify the type of car key you have. The complexity of your key determines the cost and the effort required for replacement. Traditional Mechanical Keys The simplest and most common in older vehicles. Easily duplicated at hardware stores or locksmiths. Transponder Keys Equipped with a microchip that communicates with the car’s ignition system. Offers enhanced security, as the car won’t start without the correct chip signal. Remote Key Fobs Allows remote locking, unlocking, and other functions like opening the trunk. Replacing a lost or damaged fob can be more expensive due to programming needs. Smart Keys Found in modern luxury cars, these keys provide keyless entry and start. Operate via proximity sensors, making them highly convenient but costly to replace. Each key type requires a different replacement approach, so understanding your key’s functionality is crucial. The Replacement Process: What to Expect Replacing a car key can range from a quick, inexpensive fix to a more involved process requiring specialized tools and expertise. Here's a step-by-step overview of what to expect: Determine Your Replacement Options Authorized Dealership : Best for complex keys, but often the most expensive option. Local Locksmith : Typically faster and more affordable for mechanical keys and some transponders. Online Services : Websites offering key duplication or fob replacements can be convenient, though programming may still require a locksmith. Gather Essential Information Vehicle identification number (VIN) and proof of ownership. Details about the key type and car make and model. Programming and Testing Keys with transponders or fobs often require programming to match your car’s system. A professional locksmith or dealership will ensure the new key functions seamlessly. Costs: How Much Should You Expect to Pay? The cost of car key replacement varies significantly based on the key type, service provider, and your location. Here’s a general breakdown: Mechanical Keys : $10–$50 for duplication. Transponder Keys : $75–$200, including programming. Remote Key Fobs : $150–$400, depending on the car make and model. Smart Keys : $250–$600, with luxury models at the higher end. Factors affecting cost include the car's age, whether you need key programming, and the urgency of the service. Always compare prices across locksmiths, dealerships, and online providers for the best deal. A Global Perspective: Trends and Innovations in Car Key Replacement Car key replacement practices vary worldwide, influenced by technology, availability of services, and local regulations. United States and Europe : Locksmiths and dealerships dominate the market, with online platforms gaining traction for basic duplications. Asia : With the rise of smart keys in markets like Japan and South Korea, dealerships often handle replacements due to proprietary technology. Emerging Markets : Mechanical keys are still prevalent, and costs are generally lower, though advanced key systems are increasingly common. Global trends indicate a shift toward digital and biometric key systems, with smartphone-based replacements and app-controlled access gaining popularity. However, these advancements also raise concerns about cybersecurity and hacking. Tips to Avoid Future Key Emergencies While no one can predict when a key might be lost or damaged, a few preventative measures can save you from headaches down the road: Invest in a Spare Key : Having a duplicate ready can save time and money. Use a Key Finder Device : Attach a Bluetooth tracker to your keyring to locate lost keys easily. Protect Smart Keys : Store them in a signal-blocking pouch to prevent relay attacks. Plan Ahead and Stay Prepared Car key replacement might seem daunting, but with the right knowledge and preparation, it’s a manageable process. Understanding your key type, exploring your replacement options, and taking preventative steps can save you time and money. If you’re facing a key emergency, start by identifying your options and gathering the necessary information. And for the future, consider investing in a spare or upgrading to a more secure system. Losing your car keys may be inconvenient, but it doesn’t have to derail your plans. With modern solutions and a little foresight, you’ll be back on the road in no time.

Car Ignition Switch Problems: Symptoms, Causes, and Replacement Guide
19.11.2025

Car Ignition Switch Problems: Symptoms, Causes, and Replacement Guide

The ignition switch is one of the most important electrical components in any car. When it starts to fail, the symptoms can appear suddenly, seem unrelated, and quickly leave you stranded. This guide explains the real-world signs , the common causes , the most accurate diagnosis steps , and a clear ignition switch replacement guide that helps any driver understand what’s happening and what to do next. If you’re dealing with car ignition lock problems , this article gives you the clarity you need to fix the issue fast and safely. What the Ignition Switch Actually Does The ignition switch has two critical jobs: 1. Electrical power distribution It sends power to the dashboard, fuel pump, ignition system, starter motor, and electronic modules. 2. Starting the engine When you turn the key (or press the button), it bridges electrical circuits, enabling the starter motor to crank the engine. When the ignition switch begins failing, even slightly, it disrupts these circuits. That’s why symptoms can range from flickering dash lights to complete engine shutdown. Symptoms of a Failing Ignition Switch These are the most common, proven symptoms that mechanics use to identify ignition switch problems. 1. Car Won’t Start or Cranks Intermittently If turning the key does nothing—or the engine cranks sometimes but not always—the ignition switch may not be sending power consistently to the starter relay. Typical behavior includes: Silence when turning the key Clicks but no cranking Starts only after multiple attempts Total power loss during cranking This is one of the most classic ignition switch symptoms. 2. Stalling While Driving A failing ignition switch can cut power to the engine while you’re moving . Common signs: Sudden stall for no reason All dash lights go off instantly Engine dies when hitting bumps Engine cuts out but restarts immediately This is dangerous and needs urgent attention. 3. Dashboard Lights Flickering or Turning Off When the internal contacts inside the switch wear out, they create tiny power interruptions. You may see: Speedometer drops to zero Warning lights randomly appear Interior electronics momentarily cut out Radio resets or flickers These short power losses are a major red flag. 4. Key Feels Hot or Hard to Turn If the key is warm after driving, the switch may be overheating internally. If the key becomes difficult to rotate, the ignition cylinder (mechanical part) may be worn — which often leads to switch failure later. 5. Accessories Don’t Work in ACC Mode If turning the key to ACC does not activate: radio wipers power windows heater fan …the accessory circuit inside the switch may be failing. 6. No Sound from the Fuel Pump When Turning the Key You should hear a soft humming for 1–2 seconds. If you don’t, it may mean the ignition switch isn’t powering the pump relay. What Causes Ignition Switch Problems? Ignition switches fail for predictable and well-documented reasons. 1. Internal Wear Over Time Inside the ignition switch are metal contact plates . After thousands of cycles, these contacts burn, corrode, or lose tension. Symptoms develop slowly: random stalling needing to wiggle the key intermittent power This is the most common cause. 2. Heavy Keychains Many drivers don’t realise this: A heavy keychain constantly pulls on the ignition cylinder. Over years, this causes: internal looseness misalignment premature switch failure If your keychain has more than a few items, it may be contributing. 3. Heat and Electrical Overload Faulty relays, worn fuel pumps, or aftermarket accessories can overload the ignition switch. Excess heat damages the internal copper contacts, causing: hot key symptoms partial circuit failure total switch burnout 4. Moisture or Dirt in the Cylinder Moisture or dust causes the mechanical part of the ignition to jam or bind. This forces extra pressure onto the switch every time the key turns. 5. Faulty Key or Worn Key Blade If your key doesn’t rotate smoothly, it can damage both the cylinder and the switch . Worn keys often lead to electrical faults later. How to Diagnose Ignition Switch Problems Accurately Before replacing parts, you should confirm the ignition switch is truly the issue. These steps follow the same logic professional mechanics use. 1. Check if Dashboard Lights Turn On Turn the key to ON without starting the engine. If: no lights come on lights flicker radio stays off …the ignition switch might not be sending voltage. 2. Try Starting with Accessories On Turn the key to ACC. If the accessories work in ACC but the engine won’t start, the “start circuit” inside the ignition switch may be failing. 3. Wiggle Test Gently wiggle the key while: trying to start with ACC on with the engine idling If wiggling makes electronics turn on/off, the switch is internally worn. 4. Bump Test While Driving If the car stalls when hitting bumps or potholes, the switch is losing internal contact momentarily. This is one of the strongest indicators of a failing switch. 5. Test Voltage at the Ignition Switch (Advanced) Using a multimeter, check for: constant power switched power accessory power start signal power If any circuit fails randomly, it confirms an ignition switch fault. If you need a safety reference for electrical testing, you can check the UK Government’s general vehicle safety guidance here: Prevention: How to Avoid Ignition Switch Problems Ignition switch failures can often be prevented with small habits. 1. Keep Your Keychain Light Remove heavy accessories. This reduces stress on the ignition cylinder and switch dramatically. 2. Avoid Resting Hands on the Key While Driving Constant pressure on the key twists the internal contacts. 3. Only Use Correct, Undamaged Keys Bent, cracked, or worn keys can damage: the cylinder the switch the steering lock If your key is worn, replace it before it causes further problems. 4. Address Electrical Problems Early A failing alternator, weak battery, or short circuits can overload the ignition switch. If you notice dim headlights or battery warnings, fix those early. 5. Keep Dust and Moisture Out of the Cylinder Avoid spraying WD-40 or household lubricants into the ignition—it attracts dust. Use proper graphite lock lubricant if needed. Ignition Switch Replacement Guide You should only replace the ignition switch if diagnosis confirms it. Below is a clear replacement overview used by both DIYers and technicians. Note: Procedures vary by vehicle, but the overall steps are similar. 1. Disconnect the Battery Always disconnect the negative terminal. This prevents: accidental airbag deployment electrical shorts damage to modules 2. Remove Steering Column Covers Most cars use simple screws underneath. Once removed, the top and bottom covers split apart. 3. Locate the Ignition Switch Module It is usually mounted behind the ignition cylinder. Depending on the car: it may be held by two screws or secured with clips or integrated into a combined steering lock module 4. Remove the Electrical Connector Ignition switches usually have one large multi-pin connector. Release the locking tab and pull it gently. 5. Remove and Replace the Switch Install the new switch in the exact orientation as the old one. Common mistakes to avoid: misaligning the switch’s internal slot tightening screws unevenly damaging wiring during removal 6. Reassemble and Test Thoroughly After reassembly, test: ACC mode ON mode engine start headlights indicators wipers radio If everything works consistently, the replacement is successful. Is It Safe to Drive with a Bad Ignition Switch? Usually no . A failing ignition switch can: stall the engine suddenly disable power steering shutdown ABS cut power to headlights at night The RAC warns that electrical failures causing engine cut-outs are a serious safety risk. If your switch is failing, get it inspected immediately. FAQ: Car Ignition Switch Problems 1. How much does ignition switch replacement cost? Most replacements cost £80–£300 depending on the vehicle. Some modern cars require coding, making the cost higher. 2. Can a bad ignition switch cause the car to stall? Yes. Loss of electrical contact in the switch can cut power to the engine instantly. 3. Is a failing ignition switch the same as a bad starter? No. A bad starter prevents the engine from cranking. A bad ignition switch prevents power from reaching the starter or other systems. 4. Can a locksmith replace an ignition switch? In many cases, yes — especially for older vehicles. For modern immobilizer systems, a vehicle technician may be required. 5. Can I drive with ignition switch problems? It’s unsafe. The engine can cut out while driving, especially on bumps or turns. 6. Does a bad ignition switch affect accessories only? It can affect: accessories engine start fuel pump dashboard power ECU communication It depends on which internal circuit fails. 7. What’s the lifespan of an ignition switch? Most last between 10–15 years , depending on usage and electrical load. 8. Do push-button cars have ignition switches? Yes — they use an electronic ignition switch module instead of a mechanical one. Failure symptoms are similar. 9. What does a worn key have to do with ignition switch problems? A badly worn key can cause mechanical strain on the cylinder, which then stresses the electrical switch linked behind it. 10. Can I prevent ignition switch issues? Yes — keep your keychain light, avoid forcing the key, and keep electrical systems maintained. For high-quality replacement automotive parts and spare key, visit our shop at mr-key.com .

Can a Locksmith Cut a Key from a Photo or Code?
12.11.2025

Can a Locksmith Cut a Key from a Photo or Code?

Short answer: yes— for many keys, a locksmith can cut accurately from a photo or a code . The details depend on the key type, the quality of the image/data. Key cutting from code vs from photo By code (most precise). A key code (often printed on locks, key tags, or documentation) translates into a series of cut depths called the bitting . On a code machine, a locksmith dials those depths and cuts a new key without the original present . This is the preferred method for many utility keys (e.g., caravan, retro auto, e-bike battery, furniture, mailboxes, ATVs, roof racks, towbars), but also for car keys. By photo (works in many cases). From a clear, square-on image, a trained technician can decode the cut depths and reproduce the bitting. Research has shown keys can be recreated from ordinary or telephoto shots if the profile and scale are known. This is why publishing close-ups of your keys is discouraged. When a photo is “good enough” If you’re ordering car keys cut by photo or utility keys by photo , expect guidelines like: Flat, well-lit, high-resolution image; key blade perfectly side-on. Ruler/coin in frame for scale; entire blade visible, shoulder to tip. For double-sided/laser keys, shots of both sides. Keyway/profile identification (brand/series). Automotive: cutting from photo or code—plus programming Cutting the blade is only step one for modern cars. Since the late 1990s, most vehicles have immobilisers ; the key’s transponder chip must be recognised or the engine won’t start. In practice: Get the correct blank and cut it (photo or code). Program the transponder/remote (OBD or on-board procedures), or pair a proximity fob. Test mechanical operation and ignition start. Main points UK readers should know: Immobiliser/transponder tech became standard in the mid-1990s; without a programmed chip, a correctly cut key usually won’t start the car. A key code specific to your vehicle lets a locksmith/dealer cut precisely without an original; some guides explain where owners can find it. Utility keys we commonly see cut by code If you have the key code , these are routinely cut accurately online: Retro automobile keys (classic patterns; often stamped codes). Caravan & motorhome key s (e.g., ZADI, FAP/FAWO—codes on barrels). E-bike battery keys (e.g., ABUS/AXA series). Furniture, mailboxes keys (office furniture, cam locks). ATV/quad ignition and compartment keys. Roof racks (e.g., Thule N*** series). Towbars (e.g., Westfalia/Brink code series). For these categories, supplying the printed code (from the lock face, key head, manual, or tag) usually yields the fastest, most reliable result compared to photos. Accuracy expectations & limitations What typically works well Flat cylinder keys with standard depth systems (common utility keys). Many car blades (including laser/sidewinder) if the image is clean and scaled. Keys where the lock/brand series is known and the bitting can be derived . What may be restricted or not feasible from a photo Patented/restricted keyways (require authorised proof and controlled blanks). Highly worn, bent, or obscured keys in photos. Complex security keys that need factory or authorised dealer processes. Car keys where programming tokens, PINs, or security codes are required. For security and consumer protection in the UK, look for MLA-approved locksmiths and insist on identity/ownership checks for sensitive work. Real-world risk: why photos can be enough Academic work and well-reported incidents show that key geometry can be decoded from images at surprising distances. Media have covered expensive lock replacements after keys appeared on camera, underlining the practical risk of sharing key images online. Keep your keys out of frame. What an online order typically requires For car keys (photo or code): Vehicle make/model/year, blade type, and VIN if needed for code retrieval. Clear photos (both sides). Programming method: mobile visit, on-site, or mail-in ECU/fob (varies by model). Expect additional steps for remote locking and proximity systems. For utility keys (cut by code): The code from the lock face or original key (e.g., N123 , Z **). Brand or system (Thule, Zadi, Westfalia, etc.). Quantity and turnaround needs (next-day options often available). Speed and success rates By code : fastest and most consistent for; minimal adjustment needed. By photo : slightly more validation and back-and-forth; still accurate when images meet spec. Why choose an online key cutting service like MR-KEY Unlike traditional emergency locksmiths who mainly handle urgent lockouts, MR-KEY specialises in precision key cutting from photos or codes — ideal when you’re not locked out but need an exact replacement or spare . Through our online platform, you can: Order from anywhere in the UK — simply upload a clear photo or enter your key code. Get fast, expert cutting using professional decoding software and calibrated machines. Receive your key by post , ready to use or, for vehicles, to be programmed locally. With MR-KEY, you save the cost and time of a mobile visit while still getting locksmith-level precision. Each key is verified before dispatch to ensure perfect fitting and reliable operation. FAQs Can a locksmith cut a car key from a photo? Often yes, the blade can be cut from a high-quality photo , but modern cars also need transponder/immobiliser programming before the engine will start. Is cutting by code more accurate than using a photo? For most utility keys , yes . A verified key code maps to exact cut depths, making the process highly repeatable and quick. Can someone copy my key from a social media photo? It’s technically possible; public cases and research have shown keys can be decoded from images . Avoid posting close-ups of keys online. What’s the difference between “key cutting,” “key replacement,” and an “emergency locksmith”? Key cutting : the physical milling of a blade (by code/copy/photo). Key replacement : end-to-end service supplying a working key/fob (cutting + programming if needed). Emergency locksmith : rapid response for lockouts or urgent access/security issues. Order your new key today at mr-key.com — fast, accurate, and cut by professionals from your photo or code.

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