Reasons Why Your Nissan Qashqai Key Fob Won't Work
The Qashqai has a distinctly SUV feel due to its larger dimensions. Moreover, the 19-inch wheels on Ti and ST-L models can be firm at times. The front tyres may lose grip on rough surfaces, and its CVT might occasionally exhibit wrist-flexing torque steer.
This is usually caused by dead batteries that can be replaced in a matter of minutes. Be sure that the replacement battery is of the same voltage, size, and specification.

Water Damage
Water damage is among the most common causes for an Nissan keyfob to display the "key ID wrong" message. The rubber seals on the key fob guard the chip's electronics, but prolonged exposure to moisture can cause it to stop working effectively. This is usually the case when you drop your key fob in the ocean or into a swimming water pool, but it could occur if it becomes wet due to soapy hands or rain.
If your key fob has been exposed to water for a lengthy time, it may need to be cleaned using isopropyl alcohol or electronic cleaner. It may also need to be sent to a specialist to be repaired or replaced.
If your key fob require replacement the process is simple. Make sure you have the proper multipack (CR2032 3V). Open the back and front cases using an abrasive screwdriver. You'll need to take out the clips that hold the metal together and pull out the old battery, and then insert the new one. Reassemble the fob and replace the mechanical key. Verify that it is working correctly. If it doesn't it, you'll need to bring it to a Nissan dealer or professional auto locksmith to replace the key chip. Fortunately the chip isn't normally damaged by exposure to water and therefore this shouldn't be a huge expense.
Dead Coin Battery
Another reason that the reason your Nissan Qashqai key fob might not work is because the coin battery has gone dead. They typically last for 3 to 5 years but can go bad in time, particularly if the fob is dropped frequently. You could replace the battery but ensure it's the same voltage and same size as the previous. If you replace the battery, it may cause the key to be assigned a different key ID. This could prevent it from being connected to your vehicle.
The most efficient method to change the battery inside the Nissan Qashqai Key Fob is to pry it open with an small screwdriver that has a flat head. The screwdriver needs to be inserted into a small cut on the bottom of the key fob. Make sure to gently twist the screwdriver to divide the two halves. Then, remove the old CR2025 button cell battery and insert the new one after confirming its location on the fob.
Before you put the new battery into place ensure that there is no water damage or dirt on the terminals. If there is, wash the terminals with a tiny amount of isopropyl alcohol. You should also make sure the pole cables are plugged in correctly - they should be connected to the negative and positive poles of your battery, respectively.
Fault Diagnosis
If your Nissan Qashqai key fob stops working after exposure to clean tap water or rain, it may be an indication of a chip issue inside. The battery replacement won't fix this issue, and you'll have to buy the new key fob. If you dropped the key fob on the ground and it stopped working immediately it is likely because it damaged the internal chip. If you clean the chip with isopropylethanol and paper towels, then replace it in the key fob, you can generally get it back to working.
Key ID Incorrect is a common error that you can see on the dashboard of your car. This means that the vehicle cannot recognize the key fob and will not allow it to start the engine. This can happen in various ways, including water damage, problems that are undetectable in the circuitry of the key fob or RFID interference.
If the battery that powers 12 volts in your key fob is dead or not providing enough electrical current, it will stop working. This will affect your Nissan Qashqai's remote keyless system, central locking and the ability to start the engine using the key fob. If you are unable to lock or unlock the door by hand you must check the batteries on the key fob to make sure they are in good condition. Try re-inserting the battery to reset the transmitter.
Reprogramming
If the key fob was not submerged in saltwater it should return to life with a simple rinse of clean water. You can also clean the electronic component using isopropyl or electronic cleaner. If none of these work, you may have to replace the key fob.
If your Nissan Intelligent Key still does not function, there could be a connection issue between it and your vehicle. Start by turning the ignition key but not beginning the car. Repeat this process until the hazard lights flash twice. Then, turn the car off and take away the keys.
Open the fob compartment in your vehicle's fob compartment. It's usually on the door jamb or the handle of the driver's door. Find the small "program" button and press it. Once the process is completed you will hear the sound of a chime.
Now that your Intelligent Key is relinked to the car now is the time to try it out. Click all the buttons on the key while standing at a distance away from the car. If the lights flash and the horn squeaks this means that the key has successfully linked to the Nissan. G28 can also try testing it in close proximity.