16600-5X30A — Frequently Asked Questions
Verified answers about the Denso 16600-5X30A 2.5 dCi (YD25DDTi) Common Rail Injector.
What is Denso injector 16600-5X30A?
A Denso common-rail solenoid diesel injector for the Nissan 2.5 dCi YD25DDTi engine. Denso number 295050-1050 (code DCRI301050); Nissan OE number 16600-5X30A.
Which vehicles use 16600-5X30A?
Nissan Navara (D40), NP300 Pickup and Cabstar with the 2.5 dCi YD25DDTi engine.
Is it solenoid or piezo?
It is a Denso solenoid common-rail injector.
What is the Denso number for 16600-5X30A?
Denso 295050-1050, also referenced as DCRI301050. The Nissan OE number is 16600-5X30A.
What are the symptoms of a failing 16600-5X30A?
Hard starting, rough idle and vibration, black smoke, diesel knock, loss of power or limp mode, and higher fuel consumption.
Why does my YD25 Navara knock or rattle?
A leaking injector causes a top-end knock on the YD25 that is often mistaken for timing-chain noise. Bench-test to confirm the faulty cylinder before replacing.
What causes these injectors to fail?
Poor fuel filtration, fuel contamination and water in the fuel - so fix the cause, not just the injector.
Do I need to code the injector to the ECU?
Yes. Each Denso injector has an individual correction code that must be written into the ECU after fitting, or the engine will run on default trim and may log cylinder-balance faults.
Should I replace one or all four?
Diagnose each with live correction and back-leakage values; on high-mileage YD25 engines failures often cluster, so check all of them.
Why renew the copper washer?
It is a one-use crush seal; a missing or reused washer causes blow-by and carbon build-up around the injector.
Does a remanufactured 16600-5X30A perform like new?
A properly remanufactured injector is bench-tested and recalibrated to the Denso plan to meet original delivery and back-leakage specifications.
Does it fit the Pathfinder R51?
The Pathfinder R51 uses the YD25DDTi engine, but injector revisions vary by model year and emissions - confirm the exact number stamped on your original injector by VIN before ordering.