A key fob that stops working is usually one of three things: a worn coin battery, a fob the car no longer recognizes (it needs reprogramming), or a fob that is damaged or lost (it needs replacing). The battery is the easiest check and usually the first suspect. WOW Locks handles all three in Austin. Call (844) 969-5625.
Below: what each symptom points to, a three-minute battery check, and the signs it is time to call.
What a Failing Fob Looks Like, and What Each Sign Usually Means
A fading fob rarely quits all at once. Shorter range, several presses, or a slow response usually point to the battery. A car that ignores a fob with a fresh battery points to pairing. A cracked case or water points to replacement. Match your symptom in the table, then try the cheapest fix first.
| What you notice | Usually points to | Try first |
|---|---|---|
| Range keeps shrinking | Weak battery | Replace the coin cell with the same type |
| You press the button several times | Weak battery | Same battery check, then test again |
| No light and no response at all | Dead battery, or a broken contact | Open the case, check the cell and the contacts |
| Works at the door, but the car will not start | Battery is not the problem; the car is not reading the chip | Hold the fob against the start button, then check your owner’s manual |
| Nothing changes after a new battery | Fob not paired to the car | Call us for reprogramming |
| Cracked case or water damage | Damaged fob hardware | Plan on a replacement fob |
Our local technicians program fobs on site when the vehicle supports on-site programming, and we confirm that on the call. If your table row says pairing or replacement, the car key replacement page shows how that job works.
The Three-Minute Battery Check (Do This Before You Call)
Open the fob, read the number printed on the coin cell, and replace it with the same type, positive side facing the way the old one sat. Capacity differs between CR2032, CR2025 and CR1632, so match the label. Wrong polarity can stop the fob working or drain it early. Follow the steps below.
- Find the seam or slot on the fob. Many have a small notch for a coin or a flat tool.
- Pry the case open gently. Note which way the old cell faces before you lift it out.
- Read the code on the cell, such as CR2032. Check your fob’s label or owner’s manual too.
- Seat a cell of the same type, positive side as marked, and press the case shut.
- Test the lock and unlock buttons from a few steps away, then try starting the car.
Safety first: keep loose coin cells away from children and pets. If one is swallowed, go to the emergency room right away and call the National Battery Ingestion Hotline at 1-800-498-8666. More at poison.org/battery.
Dead Remote Battery, but the Car Still Starts? Why Buttons and Chip Are Separate
The remote buttons run on the fob battery. The chip that lets the engine start is passive: the car’s reader powers it when the fob is held close, so a flat battery can kill the buttons yet still start many cars. The exact method varies by make, so use your owner’s manual.
A university paper on vehicle immobilizers describes the same split. The start chip is a passive part energized by the reader, and the battery-powered transmitter handles lock and unlock. One automaker’s own page tells a driver with a dead smart key battery to press the start button with the fob held right against it. That is one maker’s method, not a rule for every car.
The buttons need the battery. The start usually does not.
If your car starts this way, you have a battery problem and not a pairing problem. Swap the cell and the buttons should come back. Many cars also have a built-in metal key hidden in the fob, so you can still open the door.
When the Fob Is Fine and the Surroundings Are Not (Interference, Pockets, Garages)
Radio noise can mimic a dead fob. Strong transmitters nearby, metallic window tint, a phone in the same pocket, or another fob close by can cut range. Try a different spot, pull the fob away from the phone, and use the built-in key for the door. If it works elsewhere, the fob is fine.
Keyless remotes in the US operate in a narrow radio band. A Stanford course page puts it near 315 MHz, and one Toyota bulletin lists a smart key band of 312.15 to 314.35 MHz. These are the usual causes of a fob that seems dead for a moment:
- A phone or keys riding in the same pocket as the fob
- Another vehicle’s fob used close by
- Metallic window tint
- A strong radio source nearby, such as a transmitter tower or a broadcast antenna
- A battery that is low but not yet dead, which makes range worse in busy spots
Try the fob in a quiet spot a few steps from the car. If range returns, the fob is healthy and the place was the problem.
A Fresh Battery and Still Nothing: Signs the Fob Needs Reprogramming
If a correct new battery changes nothing, or a replacement fob does nothing, the car probably has not learned the fob. Reprogramming pairs the fob with the car’s computer. Some makes need every key present for it. We program fobs on site when the vehicle supports it, and programming a fob you already hold is quoted on the call.
Here is what the job needs from you:
- Every fob you have for the car, working or not
- Photo ID and proof you own the car
- The year, make, model and trim
One automaker’s manual says every key must be present when a new key is programmed, which is why we ask for the full set. If you want a second fob before one fails, read how to make a spare while one still works.
When Replacing the Fob Is the Honest Answer
Replace the fob when the case is cracked, the board has seen water, the buttons are worn through, or the fob is lost. Reprogramming cannot revive broken hardware. If this was your only key and it is gone, that becomes an all-keys-lost job with its own guide. If the fob works but the car will not start, rule out the ignition.
Two branches to know about. Lost the only fob? Start with what to do when you lose your only car key. Fob is fine and the car still will not turn over? Read about ignition cylinder problems, because the part that fails may be the ignition and not the key.
A tired fob that still half works is the cheapest moment to act. Waiting for it to quit completely usually means you find out in a parking lot.
Austin Heat, Cup Holders and Valet Handoffs
In Austin the fob lives in a hot car, a cup holder or a valet’s hand. Do not leave it on a sunlit dash, keep it off the ring with your phone, and hand a valet the minimum. A dead fob in a downtown garage or an apartment lot ends in a no-start or a lockout, so keep the built-in key reachable.
Think about where fobs actually go wrong here. A valet stand on South Congress or a downtown garage hands your fob to a stranger. Apartment lots at Mueller and the Domain mean a fob rides in a bag with a phone and a laptop. A parked car in July turns the cup holder into an oven. Three habits help:
- Keep the fob out of direct sun, not on the dash or seat
- Give a valet only the key they need, not your whole ring
- Test your spare and swap the battery before a road trip, every time
If the fob dies and you end up locked out, a lockout is $89, covered in how much a car lockout costs in Austin. The lockout service page explains the call. For the hot-car case, see what to do first when keys are locked in a hot Austin car.
What to Have Ready When You Call (and the Rate-Card Lines That Apply)
Have the year, make, model and trim, the symptom, whether the car starts, how many fobs you hold, and your ID. Published lines are remote only $60, keyless entry remote $70, remote head key $100 and push-to-start fob $100 to $300, on top of the $120 base fee. Battery swaps and programming a fob you own are quoted on the call.
The published lines at a glance, before tax and add-ons:
- Base fee for car key replacement: $120
- Remote only: $60
- Keyless entry remote: $70
- Remote head key: $100
- Push-to-start fob: $100 to $300, range varies by make and model
Fob battery swaps, programming a fob you already own, after-hours work and distance are quoted on the call before a technician is dispatched. For totals by key type, read the full price breakdown by key type or the flat-rate price list. The same rate card applies statewide, and you can see the Austin service area we cover. For any car work, the automotive locksmith page lists what we do.
WOW Locks LLC is insured and bonded and holds Texas DPS (TOPS) license B10595301.
Fob acting up? Call (844) 969-5625 with your year, make and model, or send the details through request service.