Used Nissan Pathfinder Fuel Injection Pump

The third-generation Pathfinder (R50) ran from 1996 to 2004, while the fourth generation (R51) started in 2005, so a 2003 and a 2006 Pathfinder belong to different generations with different engines entirely — a direct swap is very unlikely. The key detail is the engine code, which you can find on your V5 or via a VIN check; match this exactly rather than relying on year alone. Confirm compatibility with the breaker before purchasing, as crossing a generation boundary like this carries real risk of mismatch.

The R51 Pathfinder ran from 2005 to 2012 and received a facelift in 2010, and while the core diesel engine codes were carried across that boundary, ancillary and mounting details can change mid-production. Your best starting point is the engine code from your V5, and you should confirm with the breaker whether the specific pump they have suits your pre-2010 or post-2010 build. Never assume a facelift-to-pre-facelift swap is straightforward without that check.

Tekna is a top-specification trim on the R51 Pathfinder, but trim level has no effect on fuel injection pump fitment — the pump follows the engine, not the badge or equipment level. What matters is your engine code, fuel type (the R51 was predominantly diesel in the UK), and gearbox type, so gather those details from your V5. You may find a pump sourced from a lower-spec SVE or SE-spec R51 fits perfectly well mechanically, though cosmetic or ancillary differences elsewhere on the car are irrelevant here.

The engine code is the single most important detail for this part — it tells a breaker far more than the year or trim name alone, and pumps are engineered to precise tolerances for each unit. On the R51 Pathfinder the 2.5-litre diesel is the dominant UK engine, but you must read the exact code from your V5 or a VIN check rather than assuming. Supply that code to the breaker when requesting a quote, and always cross-reference it against the donor vehicle's code before agreeing a purchase.

Gearbox type can influence fuel injection pump calibration and fuelling demand, so a pump from a manual R51 Pathfinder is not automatically a safe fit for an automatic and vice versa. Along with the engine code, confirm your gearbox type with the breaker so they can match the donor vehicle's specification as closely as possible. This is especially worth checking on higher-mileage used units where the calibration history of the pump matters.

Within the R51 generation (2005–2012) there is a reasonable chance of compatibility if the engine codes match, but mid-production changes to ancillary fittings and mounting points mean you cannot assume every year is interchangeable without checking. Supply your engine code, gearbox type, and exact model year to the breaker, and ask them to confirm the donor vehicle's details against yours. ECU pairing and any immobiliser coding implications should also be raised with the breaker rather than taken for granted, as these are vehicle-specific and cannot be confirmed in advance.