Equivalents for the Standard spark plug W421
Standard W421, a spark plug featuring heat range medium, reach 15.2–19.0 mm. All its 15 replacement references: compatible and interchangeable equivalents — NGK, Bosch, Champion, Denso…
Technical information Standard W421 spark plug
- Resistor
- no
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15 equivalents compatible with the Standard W421 spark plug
No equivalent for this brand selection.
What can replace a Standard W421 spark plug?
The Standard W421 is interchangeable with: Beru 0100226376, Etecno1 GX80, Wellman W421, Beru GN020, FAI GGP70, Lucas LP063. These spark plugs share the same mounting (thread, seat) and heat range.
What are the specifications of the Standard W421?
Reach 15.2–19.0 mm, Heat range Medium, Resistor no, Seat Flat (gasket)
Cross-references and specifications are provided for guidance only. The wrench size can vary by brand, and some data is inferred from the plug code or an equivalent reference. Always check the vehicle manufacturer's recommendation before buying and fitting.