Car owners in India had fewer problems with their new vehicles with the JD Power Asia Pacific Satisfaction Index study revealing that eight of the 11 manufacturers had improved their performance.Maruti Udyog was ranked highest in customer satisfaction with new-vehicle sales process for the second consecutive year in the study, which also saw Mahindra & Mahindra and General Motors' Opel making significant improvements."Maruti Suzuki's performance reflects its consistent approach to building and promoting effective sales processes based on the voice of the customer," Mohit Arora, India director of JD Power Asia Pacific, said in a statement today.The industry improved its overall performance by six index points with eight of the 11 manufacturers ranked in 2005 showing improvements over 2004, the study said."Mahindra & Mahindra recorded the greatest improvement in the study with an increase of 45 index points over 2004, and takes the sixth place in overall ranking. Opel, a General Motors brand, improved 40 index points in performance to rank second," it added.