Audi allows you to lock and unlock your car remotely while sitting in the vicinity of your car, thanks to its keyless entry remote starter. You can also start your Audi with the push of a button on your key fob even when you are out of the car.
But this convenience can convert into a troubling situation for you if your key fob become unresponsive. It not only puts you in an embarrassing situation but also prevents you to unlock your car remotely and start it.
To fix all these issues I have made a detailed guide after researching the root cause and finding their possible fixes.
These will help you to get out of the trouble of the Audi key fob not working.
Let’s dig in.
How to Fix Audi Key Fob Not Working?
Audi key fob not working issue occurs commonly due to the dead or improperly placed battery. But this issue can also arise due to transmitter or receiver issues, water damage, signal interference, worn-out buttons or disconnected remote which requires reprogramming.
1. Dead Battery:
The dead battery of your Audi key fob is the leading cause of unresponsiveness. Most batteries last almost 2-3 years depending upon the brand and the shelf life of the battery.
Shelf life means the time for which a new battery can be stored without being inserted into a key fob or any other equipment.
Normally, when the batteries are about to die they give indications by decreasing the key fob range of operation. Additionally, lock and unlock buttons will become unresponsive sometimes in addition to the remote start button.
You should replace your Audi key fob battery with a compatible battery with the same size, voltage, and other specifications.
The details of your Audi car’s key fob are given on the official website you can check out the compatible key fob battery from there.
If your key fob battery is dead then your car engine will not start when you press the Push start button.
In this case, you have to touch your key fob with the push start button to make the transponder in the key fob work.
Doing this will start the engine, if not then you should check out the specific pattern and place of touching the key fob in your cars’s owner manual.
2. Battery Not Inserted Properly:
The Audi key fob battery is a coin-shaped cell and both sides are different from each other. One is positive and the other is negative pole.
If the battery is placed wrongly with the negative side attaching a positive point then the key fob will not work at all.
You should keep in mind that in case of a misplaced battery, all the functions of the key fob will not work, even the LED light on the key fob will not light up.
To solve this you will have to open the key fob once again after replacing the battery described in the previous section. After opening the battery now face up the coin-shaped cell and put your key fib halves together.
After doing that your key fob should be working fine. But if it is still not responding to the key press then follow the steps given below.
3. Loose Battery Connections:
Sometimes with usage and replacing the key fob battery by inexperienced hands, its clips might get loosened. These clips are crucial to complete the circuit of the battery.
If the clips are loose and not making tight contact with the batteries then the circuit will not complete and your key fob will not work properly.
To cater to this problem and solve the issue of the Audi key fob not working follow the steps given below.
- Open your key fob by prying in between the halves.
- Check if the battery is loose in the hub.
- If it is loose then you will have to take a little piece of paper and insert it behind the clip.
- Doing this will firmly connect the clip to the battery and will eliminate the gap.
- After this close your key fob and it will work fine.
4. Dead 12 Volt Battery of Audi:
12 Volt batteries in the cars lasts long so there is a very less chance that if you have bought your Audi recently and its battery is dead. This occurs very rarely with newer cars.
But if your Audi is older than 2 years then you will have to worry about its 12 Volt battery. Because 12 batteries can die after 2 years if not properly maintained. To avoid this you should regularly maintain your car battery.
If your Audi 12 volts battery is dying then it will notify you by behaving differently. Sometimes all functions will work and sometimes not.
Your headlights, indicators and key fob will start to become unresponsive on different occasions. When you unlock your Audi with the key fob and try to remote start it, it will not work.
You should go to the service center and get your battery checked by an expert. There might be a simple issue of loose terminals or the gravity of your battery is low.
They will replace the acid in your battery and will charge it properly and your battery will become good to work again.
But in severe cases, you might need to replace your battery with the newer one if your battery is dead.
5. Water Damage to the Key Fob:
Sometimes while jumping in the pool or enjoying the rain on a trip you might forget to cover the key fob in your pocket and consequently, it gets wet.
Despite being water resistant your Audi key fob can get damaged by the water if the seals are broken.
If some inexperienced hands replaced the battery and don’t close the key fob properly then your key fob can get damaged by the water and you will be stuck with the issue of the Audi key fob.
If water managed to get inside your Audi’s key fob follow the steps given below.
- Open your car’s key fob.
- Remove the battery.
- Clean the components with a soft cloth if it’s dropped in water.
- If it is dropped in some other liquid use the isopropyl alcohol for cleaning and all the components dry for at least 2 hours.
- After this assemble your key fob and try to make it work.
- If it is still not working then you will have to get it checked by an expert and probably you will have to buy a new one.
6. Faulty Receiver of your Audi:
Sometimes due to an electrical fault, your receiver module becomes unresponsive which is causing this issue of the key fob. You may notice that your key fob is new and working perfectly but your car isn’t responding to its commands.
This is because the receiver module in the car is not recognizing the signal coming from the key fob.
To cater to this issue you have to get it diagnosed by an expert who will check the error code and determine the area of malfunctioning.
7. Faulty Immobilizer of your Audi:
If your receiver module is working fine which can be indicated by the light flashes of your car when you press the unlock button. But after that when you press the push start button your car will not remotely start.
This is due to the issue with the immobilizer. The immobilizer in your car works as an anti-theft system and prevents the car from being started when an unauthorized attempt is made.
This issue can be resolved by diagnosing the fault using the OBD tool which will give you the exact location of the fault and then the technician will handle your case perfectly.
8. Signal Interference:
Sometimes the signal interference close to your car might be disrupting the signals to reach the car. This interference object can be due to poor weather or strong radio signals.
You start your car manually in such cases and try to PARK your car away from electromagnetic interference.
9. Key Fob Require Reprogramming:
Sometimes after a battery replacement your key fob lost the connection with the car. In this case, you will have to pair your key fob with your Audi again with the help of an instrument called an OBDII Scanner. If you are not an expert in that you can see a technician to do it for you.
If key fob is still glitching, then I will recommend buying a new one. [Buy from LockSmith]
10. Resetting the Key Fob System:
Another issue that can arise in your Audi key fob is a bug in your key fob system. This bug is causing the issue of the Audi key fob.
To rectify this issue you will have to reset your remote key system.
Unfortunately, resetting the key fob system is not easy and not universal as well. Every model has its own specific steps to do that but luckily you can do it by following the steps given below.
- Open your Audi’s hood.
- Find the 12-volt battery.
- Disconnect the negative terminal first.
- Then disconnect the positive terminal.
- Now, turn on all the electrical equipment such as headlights and horn for a few minutes to drain all the stored current.
- Wait for 10 minutes after doing all these steps.
- After that connect the positive terminal first and then the negative terminal.
I’m Zeeshan Younis, and I’ve been driving offroad vehicles, motorcycles, and jeeps since I was a kid, I love nothing more than exploring the outdoors in my Jeep, Motorcycle ATV, and UTV. I grew up in a small town in New Mexico, and that’s where my love for vehicles started. There were no paved roads where I lived, so we had to drive on dirt trails to get around. These days, I still enjoy getting out into nature as often as possible. But now, I also take along friends who also love spending time outdoors on motorcycles and offroading vehicles.