
The car chip is located inside the key. Below is a detailed introduction to the car key chip: Working Principle: The car key chip is a component capable of receiving and retransmitting pulse signals. When the car key is turned in the ignition switch, the Engine Control Unit (ECU) in the car sends a set of encrypted electronic code signals to the chip inside the car key. The vehicle will only start if the ECU unit can read and receive the correct anti-theft code signal in response. Function: The car key, even without any buttons, can activate and deactivate the vehicle's anti-theft system through the internal chip encoding. A key with a chip requires special, dedicated original equipment for programming.

I've been repairing cars for over a decade, and chips are actually everywhere in vehicles. The engine compartment hides chips that control fuel injection and ignition, while the airbag control chip is tucked under the steering wheel. The most easily overlooked spot is behind the rearview mirror – many modern cars conceal their anti-glare chips there. The center console is practically a chip nest, with multimedia and climate control chips stacked behind the screen's partition. Last time I disassembled a car, I found over twenty chips just in the center console! There are even tire pressure monitoring chips embedded inside the tires. These chips are most vulnerable to water immersion or voltage fluctuations – especially in flood-damaged vehicles where rusted chips under the chassis create major headaches, requiring complete wire harness disassembly for repairs.

As an electronic system designer, the layout of automotive chips follows the principle of functional partitioning. Powertrain chips are centrally arranged in the firewall area of the engine compartment; body control chips are located on the metal bracket behind the instrument panel, connected via flat wiring harnesses; while smart cockpit chips are integrated within the multimedia main unit enclosure. High-end models now adopt domain controller architectures, such as integrating autonomous driving chips at the top of the windshield and placing the gateway master chip on the left side of the trunk. In several recently designed new vehicles, silicon carbide power chips are even embedded within the battery pack casing for heat dissipation. For new energy vehicles with over 300 chips, the unfolded chip location diagrams can be as large as an entire ping-pong table.

After disassembling a whole car myself, I realized finding chips depends on their functions. The steering column inside the wheel hides the electronic power steering chip, while the ABS chip sticks beside the brake pedal. The most surprising is the car key - a fingernail-sized chip controls the entire vehicle's anti-theft system. When my friend's Tesla frunk got rear-ended, we saw eight palm-sized domain control chips lined up behind the radiator during repairs. The chip we interact with most daily sits behind the start button, covered by a silver heatsink. If key recognition fails, it's likely the identification chip inside the door handle got wet. Avoid spraying water jets directly into door gaps during car washes - our car club group chat sees weekly complaints about this.


