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The required wiring harness depends on whether the vehicle is amplified or not. Vehicles with the non-amplified system require the standard ISO lead.

Vehicles with the Boston Acoustics amplified system require the amp bypass or retention lead. Amplified systems can be identified by the logo on the tweeter housing. Amplified vehicles have a subwoofer installed in the boot with the amplifier located behind it.

PT Cruiser [MK1 Facelift 2.0] (2005-2008)

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