Faulty Head Unit?

Mar 28, 2019
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I've been having issues with my speakers on my 2011 Ibiza,

The front left door speaker makes no sound, neither does the right tweeter and right rear speaker, and the right door speaker cuts in and out and sounds distorted.

Fairly sure they're not blown and since the issue is spread so randomly across the car I wouldn't think it would be the wiring. I was thinking of just picking up a used head unit from eBay but I'm not sure what to do about the radio code.

Since the head units without codes are cheaper, would I just be able to grab one of those and take it to a Seat dealer to unlock it? Or is there something else that I should check?
 
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