Heater core leaks are common in this model, more so if the wrong anti-freeze/coolant is used in the cooling system.
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Repairpal verified 2005 Volkswagen Jetta problems
2.0L turbo charged engines may develop a hesitation on acceleration and/or illumination of the Check Engine Light due to a failed high pressure fuel pump or a worn camshaft follower or camshaft. Our technicians tell us that whenever the high pressure fuel pump is replaced the camshaft and the follower should be checked for wear. The camshaft lobe pushes on the follower to operate the high pressure fuel pump. Frequent oil changes and use of synthetic oil may help with this wear issue.
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.
Condensation in the heater case may cause a musty odor from the heating, ventilation and AC (HVAC) system after sitting for two hours or more. Our technicians tell us that a cleaner is available for the heater case and the drain system should be checked for debris.
Throttle body failure is not uncommon and can lead to shifting issues with the automatic transmission and other drivability concerns.
Reverse gear failures and noise in the manual transmission models are common.
Erratic turn signal operation can be a result of a failing turn signal flasher relay which will require replacement.