Consumer Guide's® Auto Editors have scoured repair bulletins and questioned mechanics to search for commonly occurring problems for a particular vehicle. In some cases we also give possible manufacturer-suggested solutions. In many instances these trouble spots are Technical Service Bulletins posted by the manufacturer, however, we have our own expert looking at additional vehicle problems.

Air conditioner: The A/C may gradually get warmer while driving in hot, humid weather because the evaporator ices up and blocks airflow. This requires reprogramming the automatic temperature control unit. (2006)

Air conditioner: The A/C may gradually get warmer while driving in hot, humid weather, or there is a hot blast of air when the car is first started, requiring replacement of the manual control unit. (2006)

Starter: The remote starter may not work because of a failed hood switch. (2005)

Steering problems: Power steering additives containing Teflon that can plug up the filter in the fluid reservoir. (2004-05)

Transmission leak: The transmission solenoid/pressure switch leaks fluid causing a check engine light requiring replacement of the solenoid and electrical connector. Fluid may also leak from the electrical connector guide on the right front corner of the transmission. (2005)

This table lists costs of likely repairs for comparison with other vehicles. The dollar amount includes the cost of the part(s) and labor (based on $50 per hour) for the typical repair without extras or add-ons. Like the pricing information, replacement costs can vary widely depending on region. Expect charges at a new-car dealership to be slightly higher.

2005 300: Bulkhead-mounted battery-cable fasteners could come loose and cause an instrument-panel fire. Dealers will tighten the fastener to proper specification.

2005 300: Certain vehicles may lack a spot weld on the rear floorpan reinforcement, which could cause seatbelt anchors to separate in a crash and lead to occupant injury. Dealers will inspect rear floorpan reinforcement and install structural rivets if necessary.

2005 300: Front seatbelt-loop bolts may not have been properly tightened, possibly causing seatbelts to fail in a crash. Dealers will tighten shoulder-belt adjuster-loop bolts to proper specification.

2005-06 300 w/ 42 RLE Automatic Transmission: Improperly installed cup plug on 42RLE automatic transmission could prevent transmission from shifting into Park. Dealers will install a bracket on affected vehicles.

2006 300 w/2.7-liter V6: Improper spacing between rear brake tubes and EGR tube could lead to break-fluid leak resulting in decrease in braking performance. Dealers removed and replace damaged tubes and install a retaining clip to maintain proper clearance.

2007 300 long wheelbase model: The park brake cable could lose tension. Should this cable fail, the park brake will not adequately hold the vehicle in all circumstances. Dealers will replace the park brake cable.

2007 300 w/automatic: The powertrain control software can cause a momentary lock up of the drive wheels if the vehicle is traveling over 40 mph and the operator shifts from drive to neutral and back to drive. If the drive wheels locked up, loss of vehicle control could occur. Dealers will reprogram the powertrain control module free of charge.

2007: The antilock brake system control module software may cause the rear brakes to lock up during certain braking conditions. This could result in a loss of vehicle control and cause a crash without warning. Dealers will reprogram the ABS electronic control unit.