The Lions (5-2) forced four turnovers in the game against the defending NFC champion Bears.
Jason Hanson also landed three field goals for the Lions.
Chicago's Brian Griese completed 22-of-40 passes for 208 yards and one touchdown as the reigning NFC offensive player of the week, but was also intercepted four times.
Tight end Greg Olsen caught six passes and had the only score for the Bears (3-5).
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