The 30-share index had soared about 162 points to hit a high of 29,584.34 in early deals, but surrendered gains in mid-session selling.
The broader NSE Nifty closed lower by 17 points, or 0.19 per cent, at 9,119.40 after shuttling between 9,183.65 and 9,088.75.
On a weekly basis, the BSE Sensex lost 96.15 points, or 0.32 per cent, and the Nifty 31.40 points, or 0.34 per cent, sliding for the second straight week.