The Denso 16600-EC00A is a fuel injector for selected NISSAN variants with engine code YD25DDTi. Matching requires checking the original part number, engine code and vehicle data; model name and engine displacement alone are not sufficient.
The Denso 16600-EC00A is a fuel injector for selected NISSAN vehicles with engines from the 2.5-litre YD25DDTi family.
Component identification and verified reference numbers
For identification, the manufacturer name Denso belongs directly with reference 16600-EC00A. This combination is the starting point for the replacement part search. A result based solely on “NISSAN fuel injector 2.5” does not identify the component precisely enough, because the listed vehicles cover different model series, power outputs and drivetrain variants.
- Manufacturer and primary reference: Denso 16600-EC00A.
- Secondary shop reference: Dieselfixneuss DFN-16600EC00A, for a targeted search for the corresponding product.
- Verified engine code for the vehicle selection: YD25DDTi.
- Vehicle series represented: NISSAN D22, D40 and R51.
The DFN reference is used solely for identification within the shop. It is not an additional manufacturer reference or proof of vehicle manufacturer approval. The number 16600-EC00A is also listed here as a supplied part or catalogue reference; it has not been explicitly identified as an OE or OEM number.
Representative TecDoc selection for NISSAN 2.5 dCi and 2.5 Di
A total of 15 TecDoc applications have been verified. The following table shows the ten supplied examples and is therefore not a complete compatibility list. All listed variants carry engine code YD25DDTi. The different power outputs and drivetrain designations remain relevant when matching the vehicle.
| Vehicle | Engine code | Power output | Model period |
|---|---|---|---|
| NISSAN NP300 PICKUP (D22) 2.5 dCi 4x4 | YD25DDTi | 133 PS | 2008-04 – |
| NISSAN NAVARA NP300 (D40) 2.5 dCi 4WD (D40TT, D40T, D40M, D40BB) | YD25DDTi | 190 PS | 2009-12 – |
| NISSAN NP300 PICKUP (D22) 2.5 dCi | YD25DDTi | 133 PS | 2008-04 – |
| NISSAN PICK UP (D22) 2.5 Di | YD25DDTi | 133 PS | 2002-03 – 2012-12 |
| NISSAN PATHFINDER III (R51) 2.5 dCi 4WD | YD25DDTi | 174 PS | 2005-01 – 2010-01 |
| NISSAN NAVARA NP300 (D40) 2.5 dCi | YD25DDTi | 144 PS | 2005-07 – |
| NISSAN NAVARA NP300 (D40) 2.5 dCi 4WD | YD25DDTi | 174 PS | 2005-07 – |
| NISSAN PATHFINDER III (R51) 2.5 dCi | YD25DDTi | 174 PS | 2005-01 – 2010-01 |
| NISSAN PATHFINDER III (R51) 2.5 dCi 4WD | YD25DDTi | 171 PS | 2006-10 – |
| NISSAN NAVARA NP300 (D40) 2.5 dCi 4WD | YD25DDTi | 171 PS | 2006-10 – |
An open-ended production period simply means that no end date is specified for that application. It does not imply blanket approval for all NISSAN vehicles built later. Likewise, the D22 application for 2.5 Di must not be extended to every D22 variant solely because they share the same engine displacement.
Check fitment using the original part, engine code and vehicle data
Before ordering the 16600-EC00A, check the existing component. The complete marking is decisive, not just a similar portion of the number. Illegible markings or differing suffixes must be clarified before selection; visual similarity is no substitute for confirmed part matching.
- Record the original part number: Document all legible manufacturer and reference details on the removed or accessible fuel injector and compare them with Denso 16600-EC00A.
- Confirm the engine code: Verify YD25DDTi using the vehicle documents or reliable vehicle identification. The sales designation 2.5 dCi alone is not sufficient.
- Identify the vehicle variant: Consider the D22, D40 or R51 series, power output, production period and drivetrain type together.
- Compare the physical design: Compare the connector, connection positions and housing shape of the original part with the intended replacement. Differences are a reason to check again, not to modify the vehicle.
- Confirm the application: If information conflicts, use the vehicle identification number and the documented original part markings for a targeted catalogue check.
For the NAVARA NP300 D40, the selection already shows variants with 144, 171, 174 and 190 metric hp. These figures are not interchangeable search terms. For the PATHFINDER III R51, 171 or 174 metric hp and the respective variant must also be taken into account. The shared engine code helps narrow down the selection, but does not replace a complete check.
Assess symptoms and select the correct fuel injector
Rough idle, difficult starting, unusual smoke or loss of power can indicate an injection fault. However, they do not prove that the Denso fuel injector is defective. Faults in the fuel supply, electrical control or engine mechanical components can cause similar symptoms and must be considered separately during diagnosis.
On the YD25DDTi, narrowing down the fault therefore starts with fault memory, operating conditions and a check of the affected cylinders. A return-flow comparison and a suitable injector test can supplement the findings. A single correction value without the associated test conditions is not a reliable basis for replacing a part. Assessment must follow the vehicle-specific test procedures.
When working on the diesel injection system, fuel escaping under pressure poses a risk of injury. Fuel lines must not be loosened to search for leaks while the engine is running. For replacement work on the NISSAN, the prescribed pressure relief procedure, clean working conditions and vehicle-specific installation instructions are essential; generic torque settings or adaptation procedures cannot be determined from the part number.
Selecting the 16600-EC00A therefore requires two separate confirmations: a substantiated fault diagnosis and a confirmed vehicle application. The catalogue reference identifies the required replacement part, not the cause of the fault. Only comparison with the original part, the YD25DDTi variant and the specific vehicle data turns a matching search result into a reliable part selection.
Frequently Asked Questions
Which NISSAN vehicles does the Denso 16600-EC00A fit?
The representative TecDoc selection includes NISSAN NP300 PICKUP and PICK UP models from the D22 series, NAVARA NP300 D40 and PATHFINDER III R51 with YD25DDTi. It covers specific 2.5 dCi and 2.5 Di variants. Exact fitment must be confirmed using the original part number, engine code and vehicle data.
Does the 16600-EC00A fit every YD25DDTi?
Engine code YD25DDTi alone is not sufficient to confirm compatibility. The supplied selection distinguishes between model series, power outputs, drivetrain types and production periods. The original part markings, connector and housing shape must also be compared.
What does DFN-16600EC00A mean for this fuel injector?
DFN-16600EC00A is the internal search reference used by Dieselfixneuss for the corresponding product. It is neither a separate manufacturer reference nor a vehicle manufacturer OE number. The primary manufacturer reference is Denso 16600-EC00A.
What symptoms can a defective fuel injector cause on the NISSAN YD25DDTi?
Possible symptoms include rough idle, starting problems, unusual smoke and loss of power. These symptoms can also have other causes. Systematic diagnosis and, where necessary, a suitable injector test are therefore required before replacement.
