It all depends on how you feel about your car. If my car was in this situation I'd definitely get a new turbo as I've already invested a lot of money into the car and selling it at this point would be wasteful. If your car's body is really nice and you have the money and you really like your car, you might even want to consider the new engine.

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL