to enhance body stiffness instead of the approach used by the Nissan Prairie which had the front and rear doors interlock. Minor horsepower improvements were introduced in 1977 along with an increase in the width of the vehicle. A sunroof was added to the options list in 1979. 4WD was introduced as an option in 1980, on both the van and truck bodystyles, coinciding with the same feature being offered on the Subaru Rex. Fourth generation (1982–1990) May 9, 1982 is when the fourth generation model appeared (KR), with one-box van models marketed as "Sambar Try." The Try was available as a Van with a high or a regular roof, and as a high-roofed passenger model (model code KR). The suspension was upgraded to a four-wheel independent layout with MacPherson struts for the front wheels. The wheel size increased from 10 inches to 12 inches, thereby accommodating larger drum brakes used at all four wheels. The 4WD was available with a dual-range transmission. An automatic clutch was offered in the Sambar Try FL and FX. While the home market Sambar came equipped with the 544 cc, 2-cylinder EK23 engine, export versions (known as Subaru 700) received an enlarged 665 cc version of the same, producing . LHD versions were available. In May 1986 retracting seat belts became standard fitment and the TG version of the Sambar Try replaced the earlier TX-G. January 9, 1987 saw the commercial one-box versions renamed Sambar Van, while the high roofed passenger version retained the Sambar Try name. Front disc brakes were added to the options list. Full-time 4WD was available towards the end of this generations product cycle. In April 1989, a six-valve engine producing joined the regular engine in high-end versions of the Try and the Sambar truck. The EN05 four-cylinder engine later used in the Rex was never fitted to the KR/KT Sambar, as it would require re-engineering to be a replacement platform. The enlarged Domingo was available with the 3-cylinder EF10 1000 cc engine starting in 1983. This bigger version of the Sambar was available in Europe from 1983 and went by several names, such as the Subaru Sumo, Libero, Domingo, and Columbuss. The small-bodied version went by the name of Subaru 700 in the few markets where it was available. The primary difference between the Sambar and the larger-engined variants is the extension of both the front and rear bumpers