Key Fob Not Working? Battery, Shell or Programming, and What Can Be Repaired

You press the button and nothing happens. Press it again, closer to the car. Try the other button. Stand at the door and press it like it might take pity on you. A key fob that's stopped working is one of the more annoying ways to start a day, and the first worry is usually cost.

Take a breath. Fobs fail in a handful of ways, and some of those ways are cheap and fast to fix. Sorting out which one you have is half the job.

Start with the battery

The most common cause is also the simplest. The small coin battery inside the fob wears out, usually after a few years. The signs show up gradually: you have to be closer to the car than you used to, or you have to press a button several times, or the little light on the fob dims. Then one day, nothing.

Most fobs take a common coin cell, often stamped with a number on the face of the battery. You can often open the case with a small flat screwdriver or a coin in the seam. Note which way the battery sits before you pull it out. If you're not sure, bring it in and we'll check it with you. Many drivers come in expecting a big repair and leave with a battery.

Then look at the shell

The plastic case takes a lot of abuse. Dropped on pavement, sat on, chewed by a dog, squeezed in a pocket with house keys for years. A cracked case can let in moisture, loosen the battery contacts, and wear out the rubber buttons until they stop touching the circuit board underneath.

If the electronics inside are healthy, the fix can be as plain as moving the working guts into a new shell. That's often cheaper than replacing the whole fob, and it keeps the programmed parts you already have. Buttons worn smooth, cracked corners, and a case that doesn't snap shut are all good reasons to ask about a new shell.

When it's a programming problem

Sometimes the fob looks and feels fine, has a fresh battery, and still does nothing. That can mean the car has lost its connection to the fob. A dead car battery, a jump start or a replaced car battery sometimes knocks the pairing loose. A fob that's been swapped or replaced from another source may never have been paired correctly.

Programming means teaching the vehicle to recognize the fob, and whether it can be done depends on the car and the fob type. Some are straightforward. Others need specific equipment. We program new keys and fobs for vehicles, and it's worth a call to find out what your particular car needs.

What can be repaired instead of replaced

• Dead or weak battery: replace the battery, and in many cases you're done.
• Worn buttons or cracked case: move the working electronics into a new shell.
• Loose or corroded battery contacts: clean or repair them.
• Fobs that lost their pairing: reprogram the fob to the car.
• A broken key blade attached to a fob: the key portion can often be cut separately.

What usually can't be saved is a fob with a failed circuit board, water damage that has eaten the electronics, or a crushed unit. Even then, you might only need a replacement fob programmed to your car, not a whole new ignition.

One customer told us Chris came out on very short notice to repair their key fob. We do mobile service as well as counter work, so if your car is where you can't easily bring a fob to us, say so when you call.

What to bring to the counter

• The fob itself, even if it looks broken. Bring every piece, including any that has come apart.
• Your spare fob or key, if you have one, since it helps with testing and programming.
• The vehicle, when programming is involved, or at least the year, make and model.
• Your registration or other proof that the vehicle is yours.
• A photo ID.

It also helps to tell us what happened. Did it stop gradually or all at once? Was there a dropped phone, a spilled drink, a car battery replacement? Those clues narrow things down fast.

Don't wait for the last fob

If you're down to one working fob, treat that as an alert. Losing or breaking your only one turns a modest job into a more involved one, since there's nothing to copy from. Getting a spare made while the original still works is almost always simpler. Prices vary by vehicle, so call for a quote before you decide.

If your fob has gone quiet, call 509-586-9300 or bring it by 415 W 1st Ave in Kennewick. The counter is open Monday through Friday from 8:00 AM to 5:30 PM, and the phone takes emergency calls around the clock.