A car key fob that suddenly stops working can feel like a small but significant inconvenience, particularly when you’re ready to go. The team at 247 Auto Locksmith has extensive experience diagnosing and resolving key fob issues. Here’s a deep dive into the top reasons why your key fob might stop working, how to tell if it’s failing, and the best steps you can take to get back on the road.
1. It’s (Probably Not) the Battery
Key fob batteries are the most commonly suspected culprit when a fob malfunctions, but it’s not always the cause. The battery in your key fob only operates the remote control features, like locking and unlocking doors or activating your car’s alarm system. However, the chip within the fob that communicates with the vehicle to start the engine doesn’t need battery power—so if your car isn’t starting, the issue is likely unrelated to the key battery.
That said, if remote functions aren’t working (such as pressing the unlock button without response), then a battery replacement might solve the problem. If you’re unsure, we can quickly test and replace your key battery to ensure all functions are restored. Just remember, even if a battery replacement is needed, it’s a quick fix we’re happy to handle at 247 Auto Locksmith.
2. Water Damage: A Hidden Enemy
One of the most common causes of key fob failure is water damage. Whether from accidental exposure to rain, a spill, or even a quick dunk, water and key fobs don’t mix. A fob exposed to moisture may work initially, but over time, internal components can corrode due to the minerals in water. This corrosion is particularly harmful, as it can prevent the fob from functioning altogether or cause erratic performance, such as a short-circuited battery that drains rapidly.
If your key fob has been exposed to water, even briefly, it’s best to have it inspected or replaced sooner rather than later. A water-damaged fob might continue to function for a short time, but corrosion will inevitably take its toll and lead to failure. Avoiding moisture and keeping your key fob dry can go a long way in extending its lifespan.
3. Misconceptions About Key Programming Loss
There’s a common misconception that key fobs can “lose” their programming if the battery dies or is removed. Fortunately, key fobs don’t lose their programming unless deliberately erased. Removing the battery, replacing it, or even not using the key fob for a long period does not affect programming. The only ways a key fob can become “unprogrammed” include:
- Diagnostic Programming Changes: If someone intentionally deletes the fob from the car’s system by plugging it into the OBD (On-Board Diagnostics) port, it will no longer work.
- Vehicle Module Changes: Replacing certain modules in the car, like the Body Control Module (BCM), can reset the key fob programming.
- Incorrect Jump-Starting Procedures: Incorrectly jump-starting a vehicle can interfere with the programming, although this is less common.
If none of these events apply to your vehicle and the key fob still isn’t working, it’s more likely the fob itself is damaged or faulty. We can diagnose this on the spot and let you know if a replacement is necessary.
4. Physical Damage and Wear and Tear
While key fobs are designed for durability, they aren’t immune to physical wear. Over time, frequent use can lead to physical deterioration. Signs of a failing or damaged key fob include buttons that don’t work on the first press, inconsistent starting, the fob casing becoming cracked or buttons falling off. These issues can result in intermittent functionality, with the fob only working some of the time or requiring multiple attempts to activate the car’s features.
When physical damage occurs, a replacement is usually the best solution. At 247 Auto Locksmith, we offer a range of replacement key fobs to suit your needs. Our stock includes genuine, OEM, and aftermarket keys, ensuring that you can find a reliable option for any budget.
5. Replacements Options: Genuine, OEM, and Aftermarket Choices
A damaged or malfunctioning fob often requires a replacement. At 247 Auto Locksmith, we provide a wide variety of new key fobs to match nearly every vehicle make and model, ensuring quality, reliability, and proper functionality. Our offerings include:
- Genuine Key Fobs: For those looking for a direct, original replacement, our genuine fobs are identical to what dealerships offer but with the convenience and cost savings of a mobile locksmith service.
- OEM Key Fobs: Original Equipment Manufacturer (OEM) fobs provide the same quality as genuine parts but often at a lower price.
- Aftermarket Key Fobs: Ideal for those on a budget, aftermarket fobs are affordable and compatible with a wide range of vehicles.
Used key fobs are generally not reliable due to compatibility issues, so we focus on high-quality, new options that provide security and long-term usability.
6. The Convenience of a Mobile Locksmith Service
A faulty key fob doesn’t mean you have to wait for dealership availability or tow your car to a shop. With 247 Auto Locksmith’s mobile service, our trained locksmiths come to you—whether you’re at home, at work, or even stranded roadside. Our same-day service can have your replacement fob ready in as little as an hour, saving you both time and the hassle of getting to a dealership.
We also make payment easy, accepting all major cards, cash, and offering transparent pricing without hidden fees. And for peace of mind, all our key replacements come with a 6-month parts and labour warranty, ensuring you receive high-quality service with reliable aftercare.
Don’t Let a Faulty Key Fob Slow You Down!
When your key fob stops working, let 247 Auto Locksmith handle it for you. With prompt, expert service and a range of replacement options, we’re dedicated to getting you back on the road without delay. Contact us at 07921365247, email garry@247autolocksmith.co.uk, or reach out on WhatsApp. We’re here to ensure your key fob issues are resolved with ease and expertise.