Ignition

Motorcraft Spark Plug SP-537

Ford's published spark-plug service references for the 2015 Mustang 2.3-liter EcoBoost engine.

Back to parts & interchange

Published numbers

Number Type established by source Evidence note
SP-537 Motorcraft service number No additional qualification recorded.
CYFS-12Y-2 Published alternate number Printed after a slash in Ford's Motorcraft table; the inspected table does not define the identifier as an engineering number or supersession.

Applications and evidence

Relationship type matters: a service replacement, supersession, interchange, or aftermarket equivalent is not automatically the part installed when the car was assembled.

2015 Mustang — 2.3L EcoBoost I4

Relationship
Ford service replacement
Market
United States
Model years
2015
Source location
page 269, Motorcraft Parts table, Spark plugs row
Evidence boundary
Ford publishes both identifiers and directs owners to an authorized dealer for replacement; the table does not establish the exact factory-installed assembly-line plug.

Sources

  1. 2015 Ford Mustang Owner's Manual