Where is the air pump fuse located in a BMW 740?
3 Answers
The air pump fuse in a BMW 740 is located under the right-side partition panel in the rear trunk. Location of the fuse box: The fuse box is situated under the right-side partition panel in the rear trunk. Characteristics of the fuse box: A fuse box refers to the housing (also known as a fuse holder) that accommodates fuses, facilitating their installation. Some fuse boxes feature properties such as waterproofing, fire resistance, and high-temperature tolerance (depending on material and design). Fuse boxes can be categorized into lead-type fuse boxes and automotive fuse boxes. Common injection molding materials for fuse boxes include plastic, nylon, bakelite, and PBT engineering plastics. Each material varies in its high-temperature resistance. When selecting a fuse box, considerations should include the current rating of the fuse to be used, the size requirements of the fuse, and the corresponding wire gauge. Higher current ratings necessitate larger gauge wires to prevent overheating of the fuse box and wiring, which could lead to a fire.
Last time I helped my friend locate the air pump fuse for his 740, it was quite a hassle. The fuse box is hidden very deep, mainly behind the glove compartment on the passenger side. You have to pry open the side panel first to see it. There's another location inside the small storage compartment under the steering wheel on the left side—after pulling it open, you have to lie halfway down to get a good look. The air pump fuse is usually the big yellow 40A one, and the back of the fuse box cover has an air pump icon printed on it. Make sure to disconnect the car's power before working on it! If you're not sure which one is for the air pump, it's best to check each one against the repair manual diagram. Otherwise, pulling the wrong fuse could affect other functions, and that would be a big problem.
My auto repair buddy told me that the BMW 7 Series air pump fuse is mainly located in two positions. On the passenger side, you need to open the glove box and forcefully remove a plastic cover on the side, which reveals a dense array of fuses. The one under the steering wheel is even more hidden—you have to pull out the entire leg storage compartment. Focus on finding the 40A fuse labeled 'Air Suspension' or 'Tire Inflator'. Here's a testing tip: first press the air pump button on the center console and listen for the 'click' sound of the relay engaging. If there's no sound, it's likely a fuse issue. A reminder to all car owners: a blown fuse is often a chain reaction caused by an aging air pump motor.
