Plenum Chamber Bulkhead

The cross member under the rear floor between the two wheel housings is ultra-high strength (hot-formed) for crash and rigidity requirements. Where the front floor transitions to the rear floor, the ultra-high strength (hot-formed) rear cross member is the load-distributing component function in the event of a side crash.

The different plate thicknesses between minimum 0.95 and maximum 1.70 mm, customized using tailored rolled blank technology, ensures the deformation zones are at the right places. It also results in a 4.4 lb (2.0 kg) weight reduction for this component alone.