NGK / SPARK PLUG CROSS-REFERENCE
NGK R25259 Cross Reference
Explore the listed cross-reference options for NGK R25259. References on this page include Denso IXU0127 and Kawasaki J4520IXU0127.
NGK R25259 Specifications
RECORDED DATAThe recorded data lists a thread diameter of 12.0 mm, a thread reach of 19 mm and a hex size of 16 mm.
- Thread diameter
- 12.0 mm
- Thread reach
- 19 mm
- Hex size
- 16 mm
Listed Replacement Part Numbers2
1–2 of 2| Manufacturer | Part number |
|---|---|
| Denso | IXU0127View cross reference |
| Kawasaki | J4520IXU0127View cross reference |
Always confirm thread size, reach, seat type, heat range, and gap against the engine manufacturer’s recommendations before fitting a replacement.
What to Check Before Choosing a Replacement
Use the recorded dimensions as a starting point, not as a fitment guarantee.
Dimensions and Seat Type
Compare thread diameter, reach and seat type with the engine manufacturer's requirements. Similar-looking plugs can have different dimensions or seats.
Heat Range, Gap and Engine Application
A cross-reference match alone does not confirm heat range, electrode gap or engine application. Check the manufacturer's application catalogue and installation guidance before fitting another part number.
Read the spark plug specification guide