ive not checked into it but i imagine it could. although you can go into supercheap and buy one of the seats they market and install it . the difference might lay in the mounting brackets. the ones they supply could be engineered. or not. i think any modification away from manufacture requires engineering and a certificate to approve the mods. ive used the original landrover mounting points and a certified vehicle manufactured seat (subaru) BUT the mount inbetween is what would be questioned regardless of how well i think ive made it.
i once installed a bullbar on a ford ute and was told that without the bullbar manufactured hardware to attach it , and a plate of certification, then i would have insurance troubles if i were to make a claim. i contacted the manufacturer and they sent me their mounting hardware. 4 high tensile bolts i could have bought anywhere was what they sent me. not stamped approved. just 4 bolts to hold the bullbar to the ford.
so in my humble opinion, a very grey area where if it came to push and shove with an insurance company, the little man always loses.
i think even the system that allows you to slide your original seat further back in the defender would need engineering approval . mind you it may have that supplied, ive never seen one in the flesh but it does change the mount.
if i get into town one day or happen upon a vehicle engineer tester i will endevour to see if my mounts would pass. im sure for hundreds of dollars they will tell me.
regards cactus

