The Isuzu RZ4E engine is a 1.9‑liter turbo‑diesel engine that Isuzu uses in several of its modern vehicle lineups. In South Africa, the RZ4E engine is primarily fitted to the following vehicles:
Isuzu D‑MAX (1.9 Ddi models)
Introduced in South Africa around 2022 as a replacement for some of the older 2.5‑liter D‑TEQ engines.
Found in lower to mid‑spec variants of the D‑MAX bakkie range.
Isuzu MU‑X (1.9 Ddi models)
The seven‑seater SUV version of the D‑MAX also offers the 1.9‑liter RZ4E turbo‑diesel in entry‑level trims.
Key Details of the RZ4E engine:
Displacement: 1.9 liters
Turbocharged common rail diesel engine
Power: Approximately 110 kW (150 hp)
Torque: Around 350 Nm
Focused on fuel efficiency and lower emissions while providing decent towing ability.
It is not generally retrofitted to older KB/250 models or other brands’ vehicles without significant modification because of differences in engine mounts, electronics, and gearbox compatibility.
If you are considering an engine swap, it is most compatible with the latest generation of Isuzu D‑MAX and MU‑X platforms sold in South Africa from 2022 onward.
The Isuzu RZ4E engine is a 1.9‑liter turbo‑diesel engine that Isuzu uses in several of its modern vehicle lineups. In South Africa, the RZ4E engine is primarily fitted to the following vehicles:
Isuzu D‑MAX (1.9 Ddi models)
Introduced in South Africa around 2022 as a replacement for some of the older 2.5‑liter D‑TEQ engines.
Found in lower to mid‑spec variants of the D‑MAX bakkie range.
Isuzu MU‑X (1.9 Ddi models)
The seven‑seater SUV version of the D‑MAX also offers the 1.9‑liter RZ4E turbo‑diesel in entry‑level trims.
Key Details of the RZ4E engine:
Displacement: 1.9 liters
Turbocharged common rail diesel engine
Power: Approximately 110 kW (150 hp)
Torque: Around 350 Nm
Focused on fuel efficiency and lower emissions while providing decent towing ability.
It is not generally retrofitted to older KB/250 models or other brands’ vehicles without significant modification because of differences in engine mounts, electronics, and gearbox compatibility.
If you are considering an engine swap, it is most compatible with the latest generation of Isuzu D‑MAX and MU‑X platforms sold in South Africa from 2022 onward.
