Spark plug · NGK
Equivalents for the NGK spark plug 1637
NGK 1637 is a spark plug. Find its 56 compatible and interchangeable spark plugs: cross-references for NGK, Bosch, Champion, Denso and every brand.
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56 equivalents compatible with the NGK 1637 spark plug
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What can replace a NGK 1637 spark plug?
The NGK 1637 is interchangeable with: NGK ILFR5B11, Bosch FR8MII33X, Champion OE190, NGK ILFR5B-11, NGK SILFR5A11, NGK LFR5AIX-11. These spark plugs share the same mounting (thread, seat) and heat range.
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.