Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't Working
Key fobs can have issues with time, like an inability to function. While some issues might require expert attention, most can be resolved at home.
The first step is typically to replace the battery. Most fobs use flat watch-style batteries that are readily available at hardware stores or auto parts stores.
Dead Battery
When a key fob battery dies, it can be a major hassle especially if you're far from home. There are solutions to get your car back on the road in case you're keyless entry system isn't working.
The first thing to check is to see if the buttons on the key fob are working. If they do not, the problem could be in the car's locks.
If your keys will not unlock, you may find a mechanical slot in the trim around your door handles or on your vehicle (consult the owner's manual). Insert the mechanical key and try again. If this doesn't unlock the door, certain cars have an application that lets you unlock the door remotely. For example the FordPass Connect app, myChevrolet mobile app, and myMazda app permit owners to open their doors using their smartphones. These apps are charged monthly subscription fees.
It is also important to ensure that your key fob does not drain your car's batteries by being plugged into them. A dead fob can drain your battery quickly, especially if it is used to control your phone or TV while you are watching.
The key fob should be held right up to your car's start button may cause the key fob that has an empty battery. It's a quick fix that will save you a trip to the dealer or even select Interstate All Battery Center locations.
You can also determine whether your key fob is actually dead by trying it in another vehicle that has push-button ignition. If it fails it's likely that the battery requires replacement. This is why it's a good idea keep a spare key fob in the bag or purse.
Damaged Buttons
If your key fob doesn't have the ability to open doors or start your car remotely, it's possible that one or more of its buttons are damaged. The key fob may contain an electronic circuit board that has "contact pads" for each button, and these little pads are coated with an electrically conducting film which wears down over time. This wear could cause your device to respond more slowly, or even not respond at all.
The contact pad on the car keyfob is easily replaced using a flat-head screwdriver. If the case is damaged or badly smashed it will be difficult to open. You'll have to take it to an auto shop to repair the fob.
It's not unusual for a key fob to be thrown around, trampled upon or exposed to water. All of these can cause physical damage to keys, such as bending or snapping them.
This can also affect the internals of the fob, which could lead to malfunction. This is why it's always an ideal idea to keep a spare key fob in your wallet or pocket in case you accidentally damage the one you own.
Examine the battery first to determine if your key fob buttons aren't responding in the way they should. Key fobs don't require a special type of electronic device. They use the same two-dollar battery that is used in hearing aids and watches. They are sold in drug, hardware and online stores.
If the battery is working it's likely that the buttons are dirty or worn out, and can be easily cleaned using a damp cloth to wipe them clean. If remote key repair not responding, you can test a different key fob to determine if the issue is with yours or with a specific type of car key fob. If the other fob functions then it's likely your key fob has to be reprogrammed, or possibly replaced entirely.
Reprogramming
The world of fobs for car keys is more complex than the myths that surround it suggest. Basic fobs function using radio frequency signals that are unique to each car. The fobs need to be correctly programmed to allow unlocking and starting the vehicle. Reprogramming a key fob not as simple as pressing several keys. It is usually handled by the dealer.
The process of reprogramming a fob depends on the make and model year of your car and it's essential to consult the owner's manual to get step-by-step instructions. Some manufacturers, like Mercedes, use proprietary technologies that only dealers are capable of creating a new key fob, and then sync it to your vehicle. Some independent shops may also offer this service, so make sure to check reviews and prices prior to choosing the right shop.
Certain models of cars erase all other fobs if they're programmed again. This means that you'll need to have any extra fobs programmed by a professional. This is a costly proposition particularly if you're just one functional fob. Even if the mechanical key won't work to start your vehicle, it's a great idea to have a backup option that can open the doors and trunk.
If you decide to attempt to reprogram your fob on your own, be prepared for a gruelling journey. You'll be disappointed with the numerous guides on the internet that promise success. A lot of these guides were written by people who have no experience and are based on unsubstantiated statements. Some of them even claim that you can program your own car key fob in just a few clicks, which is very misleading.
Most key fobs are secured by a plastic clip that's easy to loosen, however, the battery is located inside the circuit board, which means you'll have to carefully pry it out using a tool. Once you get inside, you'll be able to find the button cell battery which is typically a small watch battery that can be found at a variety of pharmacies or home improvement stores. The replacement of the battery is generally an easy process, but it's always a good idea to test first before replacing the entire device.
Replacement
There are several ways to fix a broken or malfunctioning car key fob. An easy fix could be as simple as replacing the battery or programming the key fob however a more extensive repair might be required. It is also helpful to keep a spare fob in case one is lost or stolen.
Most modern key fobs contain the physical key in addition to the electronics they use, which makes them both more expensive and more difficult to replace than traditional keys. key fob repairs include a remote starter. Therefore, it's important to know that it could take up to an hour to have an alternative key fob cut and programmed for your vehicle.
Fobs communicate with the car receiver using a tiny radio transmitter that is mounted on the circuit board. Pressing the button triggers the transmitter, which sends an RF signal that is unique to the car's receiver. The receiver recognizes and compares the signal to preprogrammed codes. This allows the driver to unlock the vehicle and start it from a distance without inserting the key into the ignition or turning the lock.
If your fob's buttons aren't working or responding intermittently, they may be damaged by water. You may be able to repair the fob by taking it apart and looking for any damaged or unresponsive buttons. If this doesn't solve the issue, you can try reprogramming the fob or purchasing an entirely new fob.
You should check with a local auto dealer or a locksmith prior purchasing a replacement keyfob to ensure that it is compatible with the security system of your vehicle. Aftermarket fobs can be cheaper however, you must research brands and read reviews prior to trying to program them yourself. While some fobs are able to be replaced by a reputable locksmith, others require special equipment for programming that can only be used by a vehicle dealer or auto technician.