Rod bearings on the 3.8L S38B38 variant were a known endemic issue in period, with many engines replaced under warranty when new, unlike the more robust 3.6L variant.
Rod bearings on 3.8L variant
BMW E34 M5 · mechanical
Rod bearings on the 3.8L S38B38 variant were a known endemic issue in period, with many engines replaced under warranty when new, unlike the more robust 3.6L variant.