Bavsound Stage One BMW Speaker Upgrade for F26 X4 with Harman Kardon bavsound-subwoofer Resets throttle position sensors to

Resets throttle position sensors to recalibrate throttle response for optimal engine performance

Brand new — never installed

Lifetime Free Updates

Nearly every E36 out there has broken midrange and tweeter grilles (yes

oil light reset

Bavsound Stage One BMW Speaker Upgrade for F26 X4 with Harman Kardon bavsound-subwoofer Resets throttle position sensors toGET UNBELIEVABLE, CRYSTAL CLEAR SOUND. JUST BY SWAPPING OUT YOUR FACTORY SPEAKERS: We took your factory speakers and re engineered our upgrade for one thing: clarity. So you can simply swap your original speakers for ours without changing anything else in your audio system, and the result is smooth, natural, yet unbelievably detailed reproduction of your favorite music.