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Aftermarket Sub Install on 2017 Mazda 3 (Non Bose) | 2004 to 2020 Mazda 3 Forum and Mazdaspeed 3 Forums
2014 - 2018 Mazda 3 Amp and Sub Install - YouTube
2017 Mazda 3 hatchback DIY sub install, without cutting/splicing into factory wires. It sounds so good in this car. Should I post how I did it? : r/mazda3