Passat L4-1.8L Turbo (AWM) (2004)
Engine code AWM
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Replace crankcase ventilation valve and hoses.
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Replace 0-rings, clamps and miscellaneous fasteners only as necessary.
For ALL vehicles:
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Inspect and replace brake booster suction jet pump (circled) if clogged.
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Replace 0-rings, clamps and miscellaneous fasteners only as necessary.
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Visually inspect, interior of oil filter holder through crankcase ventilation system line opening (at top of holder), if excessive oil deposits are found,
clean as necessary.
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Replace oil filter.