Rear Bumper Foam Absorber - 1991 300ZX

When sourcing a replacement rear bumper foam absorber for your 1991 Nissan 300ZX, confirm the donor vehicle is a 2-seater coupe before extraction. The correct energy absorber is Nissan part number 85085-40P00, a molded urethane block that press-fits inside the rear bumper cover. In the junkyard, avoid 2+2 models (four-seater) which utilize a longer foam insert incompatible with your chassis. Inspect 85085-40P00 cores for oil contamination, waterlogging, or crystallized urethane that crumbles to the touch—these foams degrade after 30 years and lose crash absorption capability. Remove the foam by detaching the bumper cover complete rather than prying the insert out, preventing rib damage. When installing on your VG30DETT, verify the foam seats flush against the cover's upper shelf before attaching the metal reinforcement bar; misalignment causes cover distortion.