A vehicular event recording system suitable includes a camera and an event recorder having memory. An image processor processes image data captured by the camera for detecting objects. Based at least in part on processing by the image processor of captured image data, a potential lane leaving event or potential collision event or automatic braking event is determined. The event recorder receives vehicle data via a vehicle data bus of the vehicle. Captured image data and received vehicle data during a pre-event time period immediately preceding the determined event beginning is stored in memory of the event recorder. Captured image data and received vehicle data during a first post-event time period immediately following the determined event beginning is stored in memory of the event recorder.