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 air conditioning may not work due to a defective switch on the main climate-control panel. (1990-91)

Dashboard lights: The "check engine" light may come on when the car is started if it was previously shut off before the engine speed dropped below 1500 rpm. There is a repair that prevents it from recurring. (1993)

Engine misfire: The engine may run on after the key is turned off due to a faulty isolation relay for the canister-purge valve. (1990)

Engine noise: Valve springs have been known to break on the XJ6 sedan. (1990)

Radiator: The radiator fan may not run, or may run with the key off, due to water entering the fan control module by wicking down the ground wire. (1990-94)

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.

1990: Head of rear-caliper fixing bolt could break off.

1990-92: Seatbelt motor winch may lock up so belt does not function or gets stuck along track.

1994 XJ12: Hood liner can sag and interfere with the throttle linkage, causing high engine-idle speed.