Question 1

How to install a roof box on a BMW i3?

Accepted Answer

Installing a roof box on your BMW i3 requires a professional approach. BMW strongly recommends that any modifications and work on the vehicle be carried out by an authorized BMW i service center or by a qualified service with personnel trained to BMW i specifications. This recommendation is particularly important as the BMW i3 has a unique ultra-lightweight carbon fiber body structure and a high-voltage system that require specialized expertise.

Before considering installation, check that the roof box you wish to install is explicitly compatible with your BMW i3. Roof boxes approved for the BMW i3 are generally designed to work with roof bars that have a maximum width of 60 mm (adapters available for bars up to 94 mm) and a maximum distance between the bars of 85 cm. Refer to the roof box documentation to confirm its compatibility with your specific model.

If you already have compatible roof bars, the box attaches without specialized tools and installation takes about 15 minutes. However, if you need to install the roof bars yourself, we recommend entrusting this first step to an authorized BMW professional, who will ensure that the fittings are properly adapted to the vehicle's carbon structure.

The load capacity depends on the chosen box model but generally remains between 75 and 90 kg. It is crucial not to exceed the maximum prescribed load, as this could affect the performance of the Dynamic Stability Control (DSC) system and the range of your battery. Driving with a roof load alters the vehicle's behavior and energy consumption.

To obtain the accessories and installations suitable for your BMW i3, contact your authorized BMW i service center. Qualified personnel will advise you on the available options for your model, carry out installations in accordance with BMW specifications, and ensure that there is no safety risk related to the high-voltage system.

Question 2

How to change the battery of the BMW i3 key?

Accepted Answer

To replace the battery of your BMW i3 key, follow these simple steps:

1. Preparation

Get a new CR2450 battery, which is commonly used for BMW keys.

2. Open the key case

Locate the small slot on the side of the key.
Use a small flat screwdriver or a similar thin tool to insert into this slot.
Gently pry to separate the two parts of the case without forcing it to avoid damage.

3. Remove and replace the battery

Carefully remove the old battery noting its orientation (the positive side +).
Insert the new battery respecting the same orientation.

4. Close the key

Align the two halves of the case and press firmly until they snap together properly.

5. Verification

Test the key by locking and unlocking the doors of your BMW i3 to ensure that the battery is properly installed and the key works correctly.

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