After several years of operation, any car key fob begins to respond to presses with a delay or completely stops opening doors from a distance. In the case of Nissan Note first generation (E11 body) this is most often due to the natural discharge of the power supply, and not to a breakdown of the electronics. Many owners immediately run to the service center, fearing complex diagnostics, although the problem can be solved in five minutes with their own hands.
Key fob system Intelligent Key is a complex electronic device that requires a stable voltage for the radio transmitter to operate. If you notice that the range of the remote control has decreased, or the indicator on the case is blinking red, this is a sure signal to replace the battery. The procedure does not require special equipment, but requires care when opening the case so as not to damage the latches.
It is important to understand that even if the battery is completely discharged, the mechanical part of the key (duplicate) continues to work, allowing you to physically open the door. However, to start the engine without a working key fob, you will have to use the emergency starting method by applying the remote control to the steering column or the start button, which creates inconvenience.
How to understand that the battery in the Nissan Note E11 key is dead
Symptoms of a low battery in the key fob Nissan Note They do not appear instantly, but increase gradually. At first, you may notice that the remote control has stopped opening the car from the usual distance of 10-15 meters. Now you have to get closer to the door for the central locking to work. This is the first alarm bell indicating a voltage drop below the operating threshold.
The second characteristic feature is the reaction of the alarm button on the case. When you press it, the LED should light up. If it blinks dimly, glows red, or does not respond at all, the battery has reached its end of life. In some cases, a message indicating that the key's battery level may be low may appear on the vehicle's dashboard if the system Intelligent Key manages to read a weak signal.
Sometimes owners are faced with a situation where the doors open, but the engine does not start. In this case, the key fob may not transmit the authentication code to the engine control unit. You should not immediately look for a fault in the starter or immobilizer - most often the problem lies in the coin-cell battery inside the case.
Choosing the Right Battery and Tools
To successfully replace, you must select the correct type of battery. In the keychain Nissan Note E11 uses standard lithium pellet with marking CR2032. This is the most common type of battery and is sold in any supermarket or electronics store. However, not all manufacturers guarantee the same quality, so it is better to choose proven brands.
It is recommended to give preference to brands such as Duracell, Panasonic, Renata or Maxell. Cheap analogues may have lower capacity or quickly lose charge due to poor quality materials. Also pay attention to the production date: batteries have an expiration date, and a part that is too old may not last even six months.
- ✅ Original battery - often sold in Nissan showrooms, but costs much more.
- ✅ High-quality analogue - Duracell or Panasonic brands, available in retail chains.
- ✅ Tool - a flat-head screwdriver or plastic card to open the case.
Instructions for opening the key fob case
The process of opening the key fob Nissan Note requires some skill, since the body is assembled on rigid latches. Do not try to tear it apart by applying excessive force, otherwise the plastic will crack and it will be impossible to put it back together. Start by separating the mechanical key, which is hidden inside the case.
Find a small lever or button on the side of the key fob. Press down on it and slide out the metal blade of the emergency key. Now that the key is out, use it or a thin screwdriver to pry the housing open. Insert the tool into the groove between the housing halves and gently twist to release the latches.
It is important to act consistently, laying the tool around the perimeter. When the latches come away, carefully separate the two halves of the case. Inside you will see a printed circuit board and the battery itself, held in place by a metal bracket. Be extremely careful not to scratch the board or contacts.
☑️ Preparing to replace the battery
Battery replacement procedure
As soon as the case is opened, you will see a board with an installed battery. Battery type CR2032 usually kept in a special recess. To remove it, you need to lightly pry the edge of the metal bracket or the battery itself with a flat object. Try not to touch the board contacts with your fingers to avoid leaving grease marks that may oxidize over time.
Before installing a new battery, it is recommended to wipe the contacts in the compartment with a dry cloth or cotton swab. Make sure there is no corrosion or dirt on the contacts. When installing a new battery, strictly observe the polarity: the positive contact marked “+” should face up. Incorrect installation may result in short circuit or no signal.
After installing the battery, check that it is secure. It should fit tightly and not hang out in the compartment. Before putting the case back together, it is recommended to test the operation of the key fob by pressing any button and making sure that the indicator lights up. If the light blinks brightly, the replacement was successful.
⚠️ Attention: If you use a screwdriver to remove the battery, be sure to wrap the working part with electrical tape or cloth so as not to damage the traces on the printed circuit board.
Assembling the case and checking functionality
Assembling the housing requires the reverse sequence of steps. Align the two halves of the keychain so that all the grooves fit into place. Make sure that the antenna wires (if any) are not pinched or damaged. Lightly press the case around the perimeter until you hear the characteristic click of the latches.
After assembly, be sure to return the mechanical key to its place. To do this, insert it into the groove until it stops and secure it with a lever or latch. Now you need to do a test check. Approach the car Nissan Note and try to open the doors using the buttons on the remote control.
If the remote control works, also check the engine start function. If you have used the emergency start button before, try starting the car the normal way. Make sure that the indicator on the key fob responds to each press. If everything works stably, the procedure is completed.