Where is the built-in 4G card in Tesla?

[DeArthur]

Tesla's built-in 4G card is located below the center console screen. Press a small box underneath, and you'll find the vehicle's 4G card inside, which can be removed using a SIM ejector tool. Tesla Introduction: Tesla is an American electric vehicle and energy company; it manufactures and sells electric cars, solar panels, and energy storage devices. Tesla Data SIM Card: All domestically produced Tesla vehicles come with a built-in China Unicom IoT SIM card to provide internet access services. According to the requirements of the Ministry of Public Security and the Ministry of Industry and Information Technology, all vehicle owners must complete the real-name authentication for the built-in SIM card after taking delivery of the vehicle.

[VanConnor]

About that built-in 4G card in Tesla vehicles, you actually can't find it by simply taking things apart - it's hardware-integrated and soldered directly onto the vehicle's communication module. That module is typically located behind the dashboard or near the glove compartment, requiring professional tools for removal. I've researched this myself and found that post-2017 models all use this embedded solution without a physical SIM card slot. For signal reception, the module features a dual-antenna design with one antenna on the windshield and another in the trunk to boost connectivity. If you need a network upgrade, you'll have to replace the entire communication module at a service center, though honestly the current speed is perfectly stable for streaming music or checking real-time traffic info.

[EthanFitz]

Last time I went to the service center for a system upgrade, I specifically asked the technician about the location of the 4G card. The technician said it's a communication chip embedded on the MCU motherboard, roughly inside the overhead control panel near the rearview mirror. This design mainly prevents users from tampering with it and affecting the sealing, and it's much more stable than an external card slot. When using navigation to update maps, the speed is impressively fast, but you do need to remember to renew the data plan in the vehicle's system before it expires. However, I think this design is quite good—at least I've never encountered issues like poor contact in a card slot.

[LaJack]

Don't try to locate the Tesla 4G card by disassembling parts yourself—it's integrated into the overhead control module, completely inaccessible to average users. Last time I helped a friend install dashcam wiring, I spotted that black communication board only after removing interior panels, with all its chips sealed tight. Owners should check signal strength via network status in vehicle settings instead; visit a service center if connectivity fails. Newer models even require full hardware replacement for 5G module upgrades, though the subscription fee auto-deducts via the app, which is hassle-free.