The mass air flow (MAF) sensor may fail, resulting in drivability issues and/or illumination of the Check Engine Light.
Problems for specific Volkswagen Jetta years:
Car problem reports
Report A Problem
Problem with your car? See what our experts say or submit your own.
Newest reported 2001 Volkswagen Jetta problems
Engine Oil Leaks
Engine oil leaks are common from the valve cover gaskets and camshaft chain tensioner gasket.
13 Reports
One or Both Head Lights May Not Work
One or both head lights may not work due to premature head light bulb burnout and/or bulb harness failure. Care should be taken to inspect the head light harness connector for damage when replacing bulbs. Damaged connectors should be replaced.
8 Reports
Inspection of Water Pump and Timing Belt
The water pump may fail resulting in engine overheating and possible timing belt damage. Overheating and/or timing belt failure can result in very expensive engine repairs. As a precaution, it is recommended to inspect the timing belt and water pump at regular intervals.
8 Reports
Difficult to Diagnose Electrical Issues Are Typically Due to Ground Issues
Electrical issues that are difficult to diagnose—and sometimes intermittent—are typically due to ground wiring issues. The most troublesome ground locations are under the battery or at the engine.
41 Reports
Coolant Leak From Oil Filter Housing O-ring
A coolant leak may develop after oil filter replacement. The coolant o-ring seal can be damaged if the oil filter housing turns when removing or installing the oil filter. The recommended procedure is to hold the filter housing when tightening or loosening the oil filter.
18 Reports
Timing chain guide rails break
The jetta 2.8L VR6 uses a metal timing chain, intended to last the life of the car. But the chain rides, and is tensioned by several plastic guide rails. It is common for the guide rails to fail before 100,000 miles. When they fail, the timing chain will at best make a lot of noise - like marbles in a can. But the risk of the chain skipping a tooth or more on the sprockets is high and will throw off the timing. This will cause the car to run r...
1 Report
Reverse Gear Failures and/or Noise From Manual Transmission
Reverse gear failures and noise in the manual transmission models are common.
51 Reports
Check Engine Light With no Drivablity Issue
The Check Engine Light may illuminate because of evaporative (EVAP) emission failures and/or intake manifold vacuum leaks.
5 Reports
Check Engine Light Due to Ignition Component/Engine Coolant Temperature Sensor Failure
Due to an ignition component and/or engine coolant temperature sensor failure, the Check Engine Light may illuminate. Replacement of the failed component will be necessary to correct this concern.
16 Reports
Check Engine Light Due to Dirty/Failed Throttle Body
A dirty or failed throttle body can cause various drivability issues and illumination of the Check Engine Light.
8 Reports
Inspect Brakes at Every Service as Rear Brakes Wear Out Quickly
The rear brakes tend to wear out quickly; rotors may need replacement by the first brake job. Our technicians recommend that the brakes be inspected for wear regularly.
6 Reports
Engine Overheating Due to Damaged Water Pump Impeller
A damaged water pump impeller may cause an engine overheating condition. Our technicians tell us the repair should include replacement of the water pump, thermostat, and flushing the cooling system.
34 Reports
Flasher Relay Failure Can Cause Erratic Turn Signal Operation
Erratic turn signal operation can be a result of a failing turn signal flasher relay which will require replacement.
20 Reports
Power Window May Fail Due to Window Regulator
One or more power windows may fail. Our technicians tell us this is commonly due to a failed window regulator which will require replacement.
57 Reports