Mars Exploration Rover Mission Status NASA

A problem that affects the steering on NASA’s Mars Exploration Rover Spirit has recurred after disappearing for nearly two weeks.
Engineers at NASA’s Jet Propulsion Laboratory, Pasadena, Calif., are working to fully understand the intermittent problem and then implement operational work-arounds. Meanwhile, Spirit successfully steered and drove 3.67 meters (12 feet) on Oct. 17.
Rover engineers are also analyzing a positive development on Spirit’s twin, Opportunity: a sustained boost in power generation by Opportunity’s solar panels.