Bumper to Bumper Radio, the car guys on KTAR, 92.3 FM in Phoenix, AZ, broadcast every Saturday from 11:00 am to noon. On this show, Dave Riccio of Tri-City Transmission in Tempe, AZ answers a series of emails regarding car repair and vehicle maintenance. Also on this show:

• My tow truck driver recommended a shop that he said would cost half as much to repair my vehicle than the dealership. Should I take his advice?
• Thoughts on auto shops requiring down payments for major repairs.
• Filters such as the Better Business Bureau that could assist you in choosing the right shop.
• 2003 Chevrolet Silverado: I feel some slack in the steering cable, and notice almost no change when turning a quarter inch. Can the steering box be adjusted or is this an alignment issue?
• 2005 Kia Amanti: I’ve always done the majority of my own maintenance, however I do need a new timing belt. Should I take this car to the dealer or do you think a competent shop can do the job well for cheaper?
• 2008 Nissan Frontier: After recently replacing my tires and sensors my pressure light is still coming on. A shop recommended taking it to the dealer. Is this because they’re unqualified or is this possibly a technical problem? Also, will this be an issue when emissions come up?
• 2006 Dodge Charger: I’m interested in increasing the horsepower on this vehicle. What can I do to get more juice out of this engine but not hurt the integrity of my car?
• 2003 Nissan Murano: Are engine mounts and motor mounts the same thing?
• 2006 Grand Marquis: I’m having difficulty coming out of park. After replacing the brake switch I’m still experiencing this issue. What should I look into next to solve this issue?
• 1995 Jeep Wrangler: My cars NOx level is too high. After checking into a multitude of levels and tests this problem remains. What could be causing this?

Cars talked about on this show are the Land Rover, 2003 Chevrolet Silverado, 2005 Kia Amanti, 2008 Nissan Frontier, 2006 Dodge Charger, 2003 Nissan Murano, 2006 Grand Marquis, 1995 Jeep Wrangler.