AST Suspension 5100 Series Coilovers (Includes Front Top Mounts Only) (True Coilover) - 2012-2014 BMW 1 Series 114d (F2X Non LCI 3 Bolt) Trezia It could be your control

It could be your control arm bushings have failed

1987 Pontiac Firebird V6 V8

Sport Chassis Code BD Color Silver Grade Type Regular Inside Diameter 10

2011 BMW 3 Series AWD (E90/E91/E92)

Part Number CVW320-RR Damping Adjustment 36-Way Height Adjustable Yes Spring Rate (Front) 16

AST Suspension 5100 Series Coilovers (Includes Front Top Mounts Only) (True Coilover) - 2012-2014 BMW 1 Series 114d (F2X Non LCI 3 Bolt) Trezia It could be your controlThe 5100 Series shock absorbers for the 2012 2014 BMW 1 Series 114d (F2X Non LCI 3 Bolt) utilize inverted upside down technology. The inverted design is race proven technology and produces an extremely strong damper, providing better suspension geometry under heavy lateral and braking loads as seen in a road and track environment. The 5100 Series shock absorbers give your car a better performance than the standard twin tube design. With the 5100