Because of issues with the glow plugs and/or the glow plug wiring harness from the control relay, the Check Engine Light may illuminate. Our technicians tell us there is a service bulletin, not a recall from Volkswagen regarding replacement of the glow plugs on 2004-2005 model years only.
Problems for specific Volkswagen Jetta TDI years:
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Most reported 2004 Volkswagen Jetta TDI problems
High Mileage Automatic Transmissions May Have Shifting Problems
Shifting issues due to internal problems in high mileage automatic transmissions can be difficult to resolve without transmission replacement.
59 Reports
Loss of Power Due to Oil and Carbon Build Up in Intake Manifold
Oil and carbon tend to build up, creating restrictions in the intake manifold. Symptoms will be loss of power (sometimes severe) and poor fuel economy.
26 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.
24 Reports
Reverse Gear Failures and/or Noise From Manual Transmission
Reverse gear failures and noise in the manual transmission models are common.
21 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.
19 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.
16 Reports
Vehicles Using Biofuels May Have Injection Pump Failures
Cars using biofuel typically have problems with injection pump failures; symptoms can include a "no start" condition or external pump leaks.
12 Reports
Correct Maintenance of Timing Belt
To ensure longevity of the engine, our technicians recommend to follow the maintenance schedule for the timing belt.
10 Reports
Wrong Anti-Freeze/Coolant May Cause Heater Core Leaks
Heater core leaks are common in this model, more so if the wrong anti-freeze/coolant is used in the cooling system.
9 Reports
Mass Air Flow Sensor May Fail
The mass air flow (MAF) sensor may fail, resulting in drivability issues and/or illumination of the Check Engine Light.
2 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.
2 Reports