How often should spark plugs be changed in the Mazda CX-9 if there are no symptoms of stalling,ignition,poor fuel economy, hard starting,etc 60000 miles mild city driving.2010 model. Maintenance question
RepairPal Certified shops can diagnose and repair your 2010 Mazda CX-9. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.