NGK AR5S Spark Plug
Specs, cross-brand equivalents, vehicle fitment, and live prices for the NGK AR5S.
The NGK AR5S is a 18mm thread, 9.5mm reach, gasket seat, heat range 5, copper electrode spark plug. These specifications are decoded from the NGK part number and determine which plugs it safely cross-references to — a valid equivalent must match the thread, reach, seat and heat range.
Cross-reference equivalents
| Brand | Part | Metal | Buy |
|---|---|---|---|
| Denso | W20SR-U | Copper | Buy |
Affiliate disclosure: As an Amazon Associate and affiliate partner we earn from qualifying purchases. Always confirm fitment against your owner's manual or the manufacturer catalog before buying.