We (5) have travelled bangalore to cochin through aeon travels semi sleeper scania bus (Total prize 6100 for 5 people) bus booked via redbus on 03-nov-2017. Allocated bus were not in proper condition without any preliminary checking and safety precautions had been allocated. Passenger could not sleep bus mainly backside full of noise (Glass break sound). Due to that noise got awake entire journey for that but luckily that cause helps me to notice some of burning smell as well smoke in the bus (All passengers slept) around 2 am at near coimbatore (Travelled 220 km from bangalore). I only informed the driver, he immediately stopped the bus aside away from 60 km coimbatore. It was full smoke and engine oil spilling fumes (Leaking the engine oil). Driver stopped the bus around some time, many of does not what was the issue. Only few passengers know we missed big tragedy and who are argent looked other source of transport. As driver promised we will refund the amount, then we catch another bus after struggled some time and we spent around 4000 rs to reach my destination.