The Sensex rebounded into the positive zone and is now up 4 points at 11,481.Tata Motors has rallied 2% to Rs 855. Maruti and Bajaj Auto are up over 1% each at Rs 830 and Rs 2,750, respectively.Hindalco has dropped 1.5% to Rs 162. HDFC Bank is down nearly 1% at Rs 841.