Reasons Why Your Nissan Qashqai Key Fob Won't Work
The Qashqai's large dimensions give it an SUV-like feel. Its ride on 19-inch alloy wheels in Ti and STL versions can also be firm. Its front tyres can also lose grip on rough surfaces, and its CVT might occasionally exhibit wrist-flexing torque steer.
This is generally caused by an unresponsive coin battery that is easily replaced in just a few minutes. Make sure the battery you replace is of the same voltage, size and specification.
Water Damage
One of the most frequent reasons a Nissan key fob will give the "key ID is incorrect" message is due to water damage. The rubber seals on the key fob are designed to protect the chip's electronic circuit, but prolonged exposure to moisture could cause it not to work correctly. It's common to see this if your key fob was dropped in the ocean or in a pool. However, it can happen when it gets wet due to rain or soapy hand.
If your key fob is exposed to water for a lengthy period of time, it could need to be cleaned using isopropyl alcohol, or electronic cleaner. In addition, it may require the attention of an expert to repair or replace it.
If your key fob does need to be replaced, the procedure is relatively simple. Make sure you have the correct multipack (CR2032 3V). Then, open the front and back cases using a small flathead screwdriver. Remove the metal clips, remove the battery, and then replace it. Reassemble the fob and replace the mechanical key. Check that it works properly. If it doesn't, you will need to go to your local Nissan dealer or an expert locksmith to replace the chip that controls the key. Fortunately the chip isn't often damaged by water exposure, so this should not be a major expense.
Dead Coin Battery
The coin battery is a second common reason for why your Nissan Qashqai remote key fob won't work. These batteries last three to five years, but may fail over time if the fob has been frequently dropped. You can replace the battery, but be sure to use the same voltage and the same size as the original. If you use a different battery it may cause the key to have an incorrect key ID, that could hinder it from pairing with your vehicle.
The most efficient method to change the battery on the Nissan Qashqai Key Fob is to open it with an incredibly small screwdriver. In the screwdriver, push it into a small notch at the bottom of the fob, and twist gently to separate the two halves of the key fob. Remove the old CR2025 battery and replace it with a new one, noting the position of the old one within the fob.
Examine the terminals for dirt or water damage prior to installing the new battery. If not, clean car key repair using small amounts of isopropyl alcohol. You'll also want to make sure the pole cables are connected correctly - they should be connected to the positive and negative poles of the battery respectively.
Diagnostics of a fault
If your Nissan Qashqai's keys fob stops functioning after exposure to clean tap or rain water, this could indicate that there is a problem with the internal chip. Changing the battery won't fix this issue, and you'll have to buy a new key fob. If the key fob has stopped working after dropping it, it's likely that the chip inside was damaged. It is usually possible to get the key fob back to work once again if it is removed and clean the chip using paper towel and isopropyl alcohol and then insert it back in.
One common error you might see on your car's dashboard is "Key ID Not Correct." This means that the car cannot recognize the key fob and will not allow it to start the engine. The problem can be caused by a variety of factors including water damage, undetectable problems in the circuitry of the key fob or RFID interference.

If the 12 volt battery in your key fob is dead or not providing enough electrical current, it will stop working. This will affect the Nissan Qashqai's remote keyless system, central locking and the capability to start the engine with the key fob. Check the battery in the key fob in case you are not able to lock and unlock your door manually. You could also try re-inserting the battery to reset the transmitter.
Reprogramming
If the key fob was not submerged in saltwater it should be revived with a simple rinse of clean water. You can also clean the electronic chip using isopropyl or electronic cleaner. If these methods don't work, it may be time to replace the entire key fob with a new one.
If your Nissan Intelligent Key still does not work, it may be a problem with the connection between it and your vehicle. Start by turning the ignition switch without starting the vehicle. Keep doing this until you see the danger lights flash twice. Then, turn the vehicle off and take the keys out.
Open the fob compartment of your vehicle's fob compartment. It's usually in the door jamb, on the handle of the driver's side or under the armrest. Find the small "program" button and press it. When the process is complete, you should hear a chime.
It's time to test your Intelligent Key to the test. Use all the buttons on the key while at a distance from the vehicle. If the lights flash or the horn sounds, then the key is successfully connected to the Nissan. You can also test it near the Nissan.