The 2011 BMW 535i OEM Harman/Kardon Radio Audio Sound Amplifier is a high-quality unit designed for enhancing the audio experience in your vehicle. With a sleek silver design and sourced materials from Hungary, this amplifier is a perfect fit for BMW 535I owners looking to upgrade their in-car entertainment system. The unit comes with a 90-day warranty, making it a reliable and durable choice for your vehicle. Upgrade your car's sound system with this genuine BMW part, featuring the renowned Harman Kardon brand and compatibility with the specified amplifier format.