Nissan Navara 2.5 dCi Turbo

YD25DDTi or QW25: two engine codes for the same 2.5 dCi, but not the same turbo

No, not all Navara 2.5 dCi models share the same turbo. The answer lies first and foremost in the engine code stamped on the block: the YD25DDTi is the reference block found on the vast majority of configurations, whilst the QW25 appears on certain versions covering outputs of 144, 171, 174 and 190 hp. At the same power output, two vehicles carrying different codes may require distinct manufacturer references — and that is the first identification pitfall on this model.

Manufacturer references: the same power output, several possible part numbers

Nissan references multiply across this engine: the 14411-EB… family (EB70A to EB71E, EC00A to EC00E) covers the most common YD25DDTi variants, whilst references such as 751243-5002S or 767720-5004S / 5006S correspond to other power variants. Identifying the correct turbo therefore requires cross-referencing the engine code, the power output in hp, and wherever possible the original reference visible on the casing of the fitted turbo.

Causes and symptoms to be aware of before replacement

The YD25DDTi is sensitive to lubrication quality: prematurely worn bearings are often a sign of degraded oil or an overdue service interval. The characteristic symptoms are a whistling noise under acceleration, persistent exhaust smoke, or a marked loss of power with the vehicle entering limp mode. Before fitting a new turbo, it is essential to address the root cause — EGR fouling, the oil circuit, or an air leak on the intake line — to prevent the new part from failing prematurely. All turbos offered in this collection are new turbos, sold with no unit to return.