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: Overheating and/or lack of charging may result from a tensioner pulley that wears out and the tensioner; drive belt as well as A/C drive belt must be changed. (2004-05)

Brakes: Rear brakes make grinding or squealing noises and revised brake pads have been issued, while front brakes squeal when cold, so new pads along with a revised caliper support have been issued. (2004-05)

Cold-starting problems: Engine may not restart after short trip in extremely cold weather (-20F) due to master relay points freezing. (2004-06)

Electrical problem: Airbag warning light may come on due to damaged pretensioner sensor wiring breakage from adjusting the seat. (2005)

Engine noise: Engine vibration is caused by failed motor mount, and a revised mount with different rubber is available. (2004-05)

None: The headliner may get wet or drip in the winter due to moisture accumulating from the use of recirculated rather than fresh air. (2004-06)

Vehicle shake: Vibration at 55 mph corrected by installing revised motor mounts. (2004-06)

Windows: The auto-down feature of the driver's window may stop about half-way down, requiring replacement of the main switch. (2004-05)

Wipers: The wipers may not clean the windshield properly in cold weather when the rubber edge stiffens. So, revised wiper arms with greater spring pressure are available. (2004)

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.

2004-05 Mazda 3: Front airbag sensor and control module faulty.

2007: The No. 4 left side engine mount bolt may loosen if a sudden rapid acceleration is repeatedly performed, allowing the transmission to get out of position. Dealers will inspect and replace the No. 4 engine mount bolt with a modified one and, if necessary, replace the engine mount rubber and bracket with new ones.