Replacing the battery in the keys of different Volkswagen brands with your own hands
Content
The ignition key with a chip and a key fob (remote control) Volkswagen is a sophisticated electronic system that disables the security alarm, opens access to the car and allows the engine to start working. If the battery on the key fob fails, serious problems immediately arise with opening the central lock of the Volkswagen car.
Review of Volkswagen car key batteries
The Volkswagen push-button car key is powered by lithium batteries, a miniature battery the size of a small button.
The most common brand is CR2032. It is also called a pill. It is she who maintains the performance of the VW button key for a long time.
Lithium Disk Battery Labels
The first two Latin letters denote the electrochemical system that is used in this type of flat current source. CR are manganese-lithium cells enclosed in a steel case. Lithium is used as the anode, and heat-treated manganese dioxide MnO is used as the solid positive electrode.2.
The next two digits indicate the diameter, which is an integer in mm. The last digits indicate the height of the disk battery in tenths of a millimeter. Thus, the CR2032 battery stands for:
- CR - lithium battery with manganese-lithium electrochemical system;
- 20 - battery diameter equal to 20 mm;
- 32 - battery height equal to 3,2 mm.
The sockets for the battery in all car keys with Volkswagen buttons are the same and equal to 2 cm. Therefore, they use batteries from different manufacturers, the diameter of which is 20 mm.
Pros and cons of CR2032 lithium battery
Advantages:
- Provides excellent performance due to its high energy content.
- It has a good workmanship and, as a result, a long service life.
- It guarantees a long storage time due to the low self-discharge current.
- Does not lose performance in a wide temperature range: from –35 to +60 degrees.
- Complies with international quality standards: ISO 9001, UN 38.3, CE, RoHS, SGS.
Disadvantages:
- The price is higher than that of analogues with other types of elements.
- Requires careful handling due to the risk of ignition if the integrity of the housing is compromised.
Rating of CR2032 batteries of different brands by endurance
The experiment involved 15 CR2032 batteries of different brands.
To shorten the test time, an extreme 3 kΩ load was connected to each disk power supply and the time it took for the voltage to drop to 2,7 volts was measured. In reality, a key with VW buttons creates many times less load on the battery than during testing.
Table: comparison of battery life of different manufacturers, taking into account the price
| Brand name | Manufacturer country | Price, rub. | Voltage drop time up to 2,7 volts, hour | Rating |
| camelion | China | 25 | 208 | 1 |
| Renata | Indonesia | 50 | 190 | 2 |
| Duracell | Indonesia | 150 | 189 | 3 |
| Energizer | Indonesia | 90 | 185 | 4 |
| Maxell | Japan | 25 | 182 | 5 |
| Kodak | China | 40 | 170 | 6 |
| smartbuy | China | 20 | 168 | 7 |
| Sony | Japan | 30 | 159 | 8 |
| GP | Japan | 40 | 159 | 9 |
| Varta | China | 65 | 158 | 10 |
| Rexant | Taiwan | 20 | 158 | 11 |
| Robin | China | 20 | 151 | 12 |
| Panasonic | Japan | 30 | 135 | 13 |
| Ansmann | China | 45 | 124 | 14 |
| Unknown | China | 10 | 78 | 15 |
In first place, with a significant margin, is the Chinese Camelion battery, at a price of 25 rubles. for one piece. Expensive Indonesian disk power supplies Renata, Duracell and Energizer took the next three places. But their price is several times higher than that of the first brand. Disappointed Japanese Maxell, Sony and Panaconic, which are far behind the leaders.
User Reviews
Somehow in passing I took batteries for the car remote control, under the Era brand. This company sells LED lights and everything to that. So the batteries turned out to be very normal, despite the low price. Honest Chinese.
I disagree about maxell. I took several packs of 2032 six months ago. It took three weeks instead of six months. They lie in the table, they don’t even pull the signal normally. I do not argue, the office is decent, but no one is safe from a fake.
Sony CR2032 battery, I had this battery in my car key. This is far from the cheapest battery of this type, it would seem standard, ordinary lithium, like everyone else, but as they say everything is known in comparison, this is no exception, and so I use the remote control with the same frequency, this battery has worked for almost 3 years. Others work less, for example, like Camellion, I tried it - but that's another story, so the quality of Sony is worth the money, albeit more expensive, but less often you have to buy me, you can save on use time. But everyone's business is better, he will not drive on it.
I want to share my experience of using lithium batteries like CR-2032 from Camelion. For almost 5 years, I have been using these batteries in a variety of electrical appliances (floor scales, kitchen scales, an additional key fob from a car alarm, a calculating machine, etc.). I have a stationary computer for more than 8 years and lately I have not used it often and a lithium battery of this type has sat down on the motherboard, which is responsible for saving the BIOS bootloader settings. After changing the battery, I forgot about this problem for more than a year. Batteries are sold in packs of one battery. The cost is within 40 rubles, while the quality does not suffer. On the reverse side are written precautions and about the manufacturer. Batteries have the best balance of quality and price.
A good battery is like a good waiter, while it works, we do not pay attention to it. CR-2032 standard batteries are widely used in car radio keys, flashlights, computers, children's toys, alarm key fobs and many other devices. Somehow a client came with a complaint that the buttons on the car key stopped working. I even began to wonder how much a new key costs. After a series of simple manipulations, I see that the LED indicator on the key does not work, I take out the battery and ask when the last replacement was. The answer surprised me - never. Three years of daily use. Panasonic knows how to make batteries, even though it was made in Indonesia, though for Germany, where the car came from. Unfortunately, the batteries bought in our store do not last longer than a year.
Replacing the battery in the Volkswagen key
If the disk power supply in the VW key fob is discharged, the button will not be able to remove the car from the alarm and open the central lock. Therefore, you have to use the chip key to open the door manually. This is inconvenient, and the car may not start if the immobilizer does not recognize the electronic filling of the key. Replacing the battery in the Volkswagen key with your own hands is an elementary simple operation. There are two types of VW car key fobs:
- old look - consists of two parts, the chip key is located on the side end of the key fob and is manually retracted into the working position (the Volkswagen logo is circled in blue);
The WV logo is inside the blue circle, on the other side there is a round button to put the key into working position - a new look - the chip key is located on the side of the key fob and is fired with a button (Volkswagen logo in a silver-black circle).New VW key fob with firing key adorned with silver logo
Replacing the battery in the old-style key fob
The lid, under which the pill is hidden, is on the opposite side from the buttons. Therefore, the actions are as follows:
- Flip the keychain over to the side.The keychain of the old sample is distinguished by the WV logo in a blue circle
- Insert a screwdriver into the slot and slide the bottom part with it.The screwdriver is inserted into the slot on the end of the key fob.
- Carefully separate one part of the key fob from the other with your hands.Parts of the key fob must be carefully separated by hand.
- Carefully remove the cover from the bottom with your fingers.The cover comes off with the battery.
- Remove the old CR2032 current source from the socket with a screwdriver and insert a new battery into place with the positive contact (+) down.The old CR2032 battery is pulled out, the new one is inserted with the “+” sign down
- Attach the cover and press it with your finger until it clicks
- Insert the parts of the key fob into each other and slide until it clicks.After replacing the battery, the key fob is going back
Video: how to change the battery in a Volkswagen key
https://youtube.com/watch?v=uQSl7L1xJqs
Replacement in the new VW key fob
Replacing the battery in the key fob of a new sample is as follows:
- Press the round button to eject the electronic ignition key.The key is ejected by pressing the button
- Use your finger to pry off the cover in the place of the key and remove it.To remove the cover, you need to insert your finger into the groove in which the key was located.
- Carefully remove the old CR2032 battery.Remove the old battery
- Put a new one, but only with the “+” contact up.A new battery is inserted with the "+" sign up.
- Snap the cover into place.After assembly, the key fob needs to be checked
Video: replacing the battery in the Volkswagen Tiguan ignition key
There are also varieties of keys with buttons for Volkswagen cars, in which the replacement of batteries is somewhat different from the examples given above, for example, for the VW Passat.
Video: how to change the battery in the Volkswagen Passat B6, B7, B8 key
The algorithm for replacing the battery in the VW Touareg NF key fob also has its own characteristics.
Video: replacing the battery in the Tuareg NF key
The Volkswagen electronic ignition key requires respectful attention. It cannot be lost, it must always be in working order. A dead battery can lead to sad consequences: the car will not turn on or turn off the alarm, the central lock will not open, and hence the trunk. Finally, the car may simply not start. The services of specialists who know how to solve these problems are not cheap. Therefore, you should always have a new CR2032 button battery in stock and be able to change it yourself in the key fob.
