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MikeD', Technician
Category: Car
Satisfied Customers: 696
Experience:  ASE Cert, AS Degree in Automotive Diagnostics
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How to replace the spark plugs on a 2004 Hyundai Sonata

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You need to pull the upper intake plenum. This is a pretty in depth job on this vehicle.
Customer: replied 8 years ago.
Reply to MikeD''s Post: So this would not be something one would try to do in their driveway? And I would imagine it to be a costly repair...
It is not too costly due to the fact that in an equipped shop with an experienced technician can do it in about 2 hours. I wouldn't want to do it in the driveway unless I had access to an air compressor and pneumatic tools. Plus, you will need an upper plenum gasket and other misc parts.
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