Hello all, got a suspected accident damaged/repaired disco 3 which has an annoying knock when driving over potholes or mildly rigged terrain. I climbed under the bacl and just near the bumper alongside each side's exhaust there are some cast iron pieces with 03U0A cast on them along with the LR logo. I presume they are no aftermarket but cannot figure out why they are both loose and swing into the chassis itself. I reckon this is causing the knock. Any idea what they are?