I check engine light is on it states that is it Glow Plug Relay # 3. What is the cost of replacing this and what harm could this do to the engine
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2003 Volkswagen Jetta TDI Question: Glow Plug Relay
Answer #1goodguysdiesel from Good Guys Diesel, February 09, 2011, 12:46Journeyman
The plugs are approx $19.99 a piece. You can change the one that is bad or all of them. I would recommend having them ohm tested first. If they all ohm out at .9 then it is your harness that needs to be replaced.