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.

Engine stalling: If the engine occasionally looses power, stalls, or stumbles, the problem may be vibration of the mass air flow sensor. (1990-92)

Hard starting: If the starter does not work when the engine is hot, a relay may have to be installed between the battery and starter solenoid. (1990-92)

Poor drivability: Magnetic interference can cause drivability problems if the shielding for the oxygen-sensor wiring is damaged. (1990-92)

Starter: If the starter does not engage, it and the ring gear may be damaged. (1990-91)

Tire wear: Cupping of the rear tires may be caused by too much positive rear toe, which is corrected by replacing the rear-axle stub shafts. (1990-92)

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 Jetta: Power-steering-pump bracket on some cars could break.

1990: Brake fluid may exceed allowable operating temperature.

1990: End cap connecting heat exchanger's core to engine-cooling system could rupture and allow hot coolant to escape into passenger compartment.

1990-91: Engine preheating tube may not be supported, and may chafe against right front brake line.

1990-92 GLI/GTI w/16-valve engine and California Emissions: Throttle plate may not return to full idle position.

1991 California Jettas w/cruise control: Lock-nut rod may not have been properly torqued, so adjustment could change.

1991 Jetta: Some front-brake hoses are too short and could stretch and develop cracks, which could result in fluid leakage and loss of braking ability.

1992 Jetta: On a few 4-door sedans with electric windows, rear-door panel openings have sharp edges that can damage insulation of wiring harness, resulting in short circuit and potential for fire.