Parts for your 1996 Nissan Primera-Oil cap

1996 Nissan Primera Oil Cap — purpose, upkeep, and when to replace

Technical sources confirm the 1996 Nissan Primera does use an engine oil filler cap. The Nissan Primera factory service manuals for P10 (late) and P11 (1996-on) show the oil filler cap on the cam/rocker cover in Engine Mechanical and Lubrication sections