Nissan NA20 (NA family, 1.6 and 2.0)

Nissan's NA20 — a plain two-litre four for light commercials, in the D21 and D22 pickups and the vans beside them.

It is a deliberately unambitious engine. Single overhead camshaft, two valves per cylinder, carburettor or simple injection — built for a working vehicle in markets where a scan tool was not assumed. Almost nothing about it is electronic, which makes diagnosis mechanical and cheap.

It is closely related to the CA and shares much with the KA that replaced it, which is the useful route in: KA24 material is plentiful and a good deal of it transfers.

⚑ It was never sold in most Western markets, so English-language material describes the KA and the Z instead. A Navara fitted with one is usually an import, and the parts question follows from that rather than from the engine.

Its reputation is for indifference to neglect at a low output, and survivors are generally tired rather than faulty.