Procedure notes
If your convenience lights, turn signals, seat warmers, stereo, headlights or other electronic components suddenly stop working, chances are you have a fuse that has blown out. The video above shows how to check and change blown fuses in the engine bay of your 2009 BMW 135i in addition to where the fuse box diagram is located. Fuses should always be the first thing you check if your 135i is experiencing electrical difficulties because they are relatively easy and inexpensive to change yourself. The more electronics your 135i has, the more fuses it has. Some BMWs have multiple fuse boxes in the engine bay, so be sure to find the fuse(s) in question. Some components may have multiple fuses, so make sure you check all of the fuses that are linked to the component that is no longer working properly.
If you need to replace a blown fuse in your 135i, make sure you replace it with one that has the same amperage as the blown fuse. If checking and replacing the fuse for the component in question doesn't work, we recommend seeking assistance from a trusted professional mechanic. They should be able to figure out if the component needs to be replaced or if there is a short or some other problem with your 135i.
查看中文对照 · Chinese translation
如果您的便利灯、转向灯、座椅加热器、音响、大灯或其他电子设备突然停止工作，很可能是某个保险丝熔断了。 上述视频展示了如何检查并更换您的 2009 宝马 135i 发动机舱内的熔断保险丝，以及保险丝盒的布局位置。 如果您的135i出现电气问题，应首先检查保险丝，因为更换保险丝相对简单且成本较低，可以自行完成。 135i 的电子设备越多，通常配备的保险丝也越多。 部分 宝马 车型 在发动机舱内有多个保险丝盒，请确认找到的是相关保险丝。 某些部件可能有多个保险丝，因此请务必检查所有与故障部件相关的保险丝。
如果需要更换 135i 上熔断的保险丝，务必使用额定电流与原保险丝相同的替换件。 如果检查并更换相关部件的保险丝仍未解决问题，建议向可信赖的专业维修人员求助。 专业维修人员应能判断部件是否需要更换，或 135i 是否存在短路等其他问题。