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Used and remanufactured engines that fit the 2006 Audi AUDI S4. Each unit below is matched to this vehicle, warranty-backed, and shipped with freight quoted at checkout from Peak Powertrain.
Rule of thumb: a engine replacement is usually worth it when the installed cost stays under 40% of what the 2006 Audi AUDI S4 is worth — most units below beat that comfortably.
As a general rule of thumb, an engine replacement on a 2006 Audi AUDI S4 (luxury segment, vehicle value roughly $6,000–$6,720) is usually worth it when the installed cost stays under about $2,400 — roughly 40% of what the vehicle is worth.
