Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't Working
Key fobs can have issues over time, such as the loss of functionality. While some issues might require professional attention, many can be resolved at home.
The battery replacement is usually the first step. Most fobs are powered by flat watches-style batteries that can be easily found at auto parts or hardware stores.
Dead Battery
If the battery for a key fob fails, it can be a major inconvenience especially if you're far from home. However, there are options to get back on the road even the vehicle's keyless entry system isn't working.
One of the first things to check is to determine if the buttons on the key fob work. If they aren't it could be a problem with the car's locks.
If your keys do not unlock, there may be an electronic 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 fails to unlock the door, some vehicles have an application that lets you unlock the door remotely. For instance the FordPass Connect app, the myChevrolet mobile app and myMazda app allow owners to unlock the doors using smartphones. However, these apps require a monthly cost.
Also, make sure that your key fob does not drain your car's batteries by resting on them. A dead key fob can drain your battery fast, especially if it is used to control your phone or TV while you are watching.
A key fob that's low on battery can be started by holding it until you hit the start button. It's a simple fix that can save you a trip to the dealership or to select Interstate All Battery Center locations.
You can also determine if your key fob is actually dead by testing it in another vehicle with push-button ignition. If it's not working, the fob battery probably requires replacement. It's a good idea keep a spare key fob in your purse or backpack.
Damaged Buttons
If your key fob doesn't have the ability to unlock doors or start your car remotely, it's likely that one or more of its buttons is damaged. Your key fob is equipped with an electronic circuit that has "contact pads" which are covered by an electrically conductive film. This film wears off over time. The wear may cause your fob to react slower, or not respond at all.
The contact pad on a car keyfob can be easily replaced using the flat-head screwdriver. If the case is damaged or badly damaged it may be difficult to open. You'll have to take it to an auto shop to get the fob repaired.
It's not uncommon for a key fob to be dropped on hard surfaces, walked on, or exposed to water. All of these incidents can cause physical damage, such as breaking and snapping keys.
This could also cause internal damage to the fob and result in an issue. It's a good idea, that's why you should always carry an extra fob in your purse or in your pocket in case the one you're using breaks.
Make sure the battery is charged first if your key fob buttons are not responding like they should. Be aware that key fobs aren't a special type of electronic device - most of them run on the same two-dollar batteries that are used in hearing aids and watches, which are readily accessible at drug stores, hardware stores, and on the internet.
If the battery is functioning properly the buttons could be dirty or worn out. You can easily clean them using a damp cloth. If they're still not responding, test a different key fob to determine if the issue is related to yours or with a specific type of car key fob. If the other key fob works it is possible that yours needs to be reset or replaced.
Reprogramming
The secret world of fobs for car keys is more complex than the myths that surround it suggest. Basic fobs operate with radio frequency signals that are specific to each car. The fobs must be programmed correctly in order for them to open and start the vehicle. Unfortunately the process of reprogramming a fob isn't as simple as pressing a few buttons, and with very few exceptions it has to be done by the dealer.
The procedure for reprogramming the fob is dependent on the manufacturer and model year of your vehicle and it's essential to read the owner's manual for step-by-step instructions. Certain manufacturers, like Mercedes have proprietary technology that only dealers are able to create 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 selecting a shop.
Certain car models erase all other fobs once they've been programmed, meaning you'll need to get any additional fobs programmed professionally. This is an expensive proposition especially if you're only down to just one working fob. It's always recommended to have a spare mechanical key you can use to open the trunk and doors even if it doesn't start the car.
If you decide to attempt to reprogram your fob yourself, be prepared for a frustrating journey. There are many guides online that promise to work, but you'll likely be disappointed. A lot of these guides were written by people with no experience in this area and often are founded on unsubstantiated claims. Some even claim that you can program your own car key fob in just a few clicks, which can be very false.
The majority of key fobs are held by a plastic clip which is easy to remove, however, the battery is located inside the circuit board, which means you'll have to carefully pry it out using a tool. Once car keys repairs get inside, you'll be able locate the button cell battery, which is typically a tiny watch battery that can be purchased at a variety of pharmacies or home improvement stores. Removing the battery is typically a straightforward procedure, and it's always a good idea to test first before replacing the entire unit.
Replacement
There are a variety of ways to fix a broken or malfunctioning car key fob. It may be possible to repair the issue quickly by replacing the battery or reprogramming your key fob. However an extensive repair may be needed. It can also be helpful to keep a spare fob in the event that one is lost or stolen.
Modern key fobs are more expensive and harder to replace due to the fact that they have a physical key and electronic. car key repair include remote starters. It's important to understand that it can take up to an hour to cut and program a replacement fob for your vehicle.
Fobs communicate with the car receiver using a tiny radio transmitter on a circuitboard. By pressing a button, the transmitter transmits an RF signal specific to the car receiver. The receiver detects and compares the signal with preprogrammed codes. This allows the driver to unlock the car and start it from a distance, without putting the key in the ignition or turning the lock.
If the buttons on your key fob aren't working or responding intermittently, they could be damaged by water. It is possible to fix the fob by taking it apart and looking for any damaged or unresponsive buttons. If this does not solve the problem, try reprogramming it or purchasing an entirely new fob.
You should check with an auto dealer in your area or a locksmith before purchasing a replacement keyfob to ensure it's compatible with the security system of your vehicle. There are many aftermarket fobs cheaper, but it's important to look up the brands and read reviews prior to attempting to program them. Some fobs can be changed by an accredited locksmith, but other models require programming equipment that only a car technician or dealer is able to use.