2004 Volkswagen Jetta TDI Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2004 Volkswagen Jetta TDI
Verified by mechanics, reported by drivers like you
Ask a mechanic in our community
Never overpay. Check prices with our estimator
2004 Volkswagen Jetta TDI ProblemsCheck Engine Light Due to Issues With Glow Plugs/Wiring Harness
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.
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.
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.
2004 Volkswagen Jetta TDI Questionscost to replace glow plug bridge and relay? Dealer wants $710 (1 answer)
part #s 038971782C, 038907281C
Can the parts be purchased aftermarket or do I have to get it from the dealer?