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.

Check-engine light: Check engine light comes on indicating problems with the secondary air system caused by carbon buildup in the cylinder heads of 4.4L V8 requiring removal to clean. (2000-01)

Headlights: The Xenon headlights may not illuminate if the switch is turned while cranking engine. (2000)

Odometer: Due to a software error, the trip odometer resets itself after 650 miles. (1997)

Oil leak: Oil and coolant leak from valley in V8 engine could be a rear main seal leaks. (1997-2001)

Rough idle: Vehicles equipped with variable valve timing system (VANOS) engines may suffer engine valve jamming and varnish buildup if oil changes are extended. (1997-01)

Seat: The power seats may not work because misrouted wires short out and blow the fuses (1996-97)

Seat: The seat back or entire seat may move spontaneously requiring either a replacement rocker switch, control module, or both. (1997)

Sunroof/moonroof: If the sunroof does not work, it may have to be reinitialized by removing and reinstalling the fuse then holding the "tilt" button until the roof tilts twice. (1998)

Trunk latch: The trunk release button may not work because the rubber seal moves and holds the switch closed. (1998)

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.

1997 5-Series: In some cases, long exposure to certain environmental and operation conditions could cause front spring strut plate to begin to crack, and possibly break eventually.

1997 5-Series: On certain vehicles, environmental conditions may cause the front string strut plate to break and interfere with the front tires. Dealers will inspect and install a retaining clip.

1998 5-Series 528i: Sealing material of automatic-transmission gear position switch can develop leaks and allow water entry; may eventually result in incorrect indication of gear position.

1998 5-Series 540i: Differential pinion shaft was produced without appropriate surface hardening, which can result in premature wear; would cause failure of the shaft and loss of power to rear wheels.

1999 5-Series 540i: Thickness of main positive electrical cable is less than specified, making it susceptible to abrasion by attaching clip; short circuit could occur.

1999 5-Series 540i w/automatic transmission: Premature wear of ring gear can occur on some cars, leading to loss of 1st, 2nd, 3rd, and reverse gears.

2000 5-Series: Brake-lamp switch could fail internally, remaining either in "off" or "on" position.

2000-01 5-Series M5 w/18-inch wheels: Tire sidewalls may have been damaged at the manufacturer. The damaged area could weaken to the point where a sudden loss of air from the tire could occur.