Where are the positive and negative terminals of the BMW 1 Series battery?
3 Answers
The positive terminal is located under the red plastic cover in the engine compartment. As for the negative terminal of the battery, there is a cover directly above the battery - red indicates positive and black indicates negative. The battery positive terminals must be connected together. The BMW 1 Series battery replacement tutorial is as follows: 1. First, locate the battery position in the trunk. 2. Remove the battery terminal protection and the fixing bracket nuts. 3. Disconnect the negative terminal connection before removing the positive connection. Since the negative terminal is connected to the car body, this prevents metal removal tools from accidentally touching the body and causing a short circuit. 4. After removing the surrounding fixing devices and positive/negative cables, the battery can be taken out for replacement. (Note: When the tilt angle exceeds 40°, electrolyte from the old battery can easily leak out.)
The positive and negative terminals of the BMW 1 Series battery are usually located in the luggage compartment (trunk). As an owner who has driven it for several years, I often deal with this during routine minor maintenance. Open the trunk lid, lift the bottom carpet or protective cover, and the battery is right there, easily visible. The positive terminal is marked in red or with a plus sign, while the negative terminal is black with a minus sign, and sometimes directly connected to the car body. Be careful when operating—disconnect the negative terminal first to avoid short circuits, sparks, or burns. Remember, wearing insulated gloves is a good practice, and avoid touching both terminals directly with metal tools, especially in older cars where battery fluid corrosion may be a concern. The location doesn’t vary much, but differences exist based on specific model years—check the manual to confirm.
My neighbor Xiao Zhang just bought a BMW 1 Series and asked me this question. I told him directly: The battery terminals are mainly located under the trunk. Just lift the soft padding and the protective cover to see them. The positive terminal has a red protective cap, while the negative terminal is black and grounded. Safety first—don’t touch them with wet hands, and it’s recommended to operate before starting the car to avoid accidental electric shock. If the location is unclear, try looking for the battery icon as a hint. Beginners might want to bring a friend to help with lighting, as the battery is positioned toward the rear, but clearing away clutter will expose it. The key point is not to mix up the positive and negative terminals, or the equipment might flicker uncontrollably!
