The "PZJ" in Toyota Land Cruiser refers to a specific engine configuration. It designates a 5-cylinder 3.5L diesel engine, the 1PZ, which was used in some Land Cruiser 70 series models, specifically between 1990 and 1999. This engine was essentially a 6-cylinder 1HZ engine with one cylinder removed.
PZJ: Identifies the specific engine model, the 1PZ, a 5-cylinder diesel.
