Chēzài diànnǎo chūle gùzhàng, dǎoháng jiù shīlíng le.
When the onboard computer malfunctioned, the navigation stopped working.
Tips
usage
车载 (chēzài, literally 'vehicle-mounted') is a productive prefix: 车载导航 (in-car nav), 车载音响 (car audio), 车载冰箱 (car fridge). 车载电脑 refers to both the engine-control ECU and the user-facing infotainment system, depending on context.