Spark plug · Bosch

Equivalents for the Bosch spark plug WR9FP4

Meet the Bosch WR9FP4 spark plug featuring hex size 13/16″ (20,8 mm), reach 9.5 mm, thread 14 mm, heat range very hot, electrode platinum, tightening torque cast iron 25–35 N·m · aluminium 25–30 N·m — or 180°–240° (½–⅔ turn). Compare its 32 equivalents and find the cheapest compatible plug: NGK, Bosch, Champion, Denso and more.

Technical information Bosch WR9FP4 spark plug

Resistor
yes
Ground electrodes
1
Torque
cast iron 25–35 N·m · aluminium 25–30 N·m — or 180°–240° (½–⅔ turn)

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What can replace a Bosch WR9FP4 spark plug?

The Bosch WR9FP4 is interchangeable with: Bosch WR9FP, Champion RJ18YC6, Denso W16PR-U15, Bosch WR9FPY, Bosch WR9FPZ, Bosch WR9FPY4. These spark plugs share the same mounting (thread, seat) and heat range.

What are the specifications of the Bosch WR9FP4?

Spark plug wrench 13/16″ (20,8 mm), Thread 14 mm, Reach 9.5 mm, Heat range Very hot, Electrode Platinum, Resistor yes, Seat Flat (gasket), Ground electrodes 1, Torque cast iron 25–35 N·m · aluminium 25–30 N·m — or 180°–240° (½–⅔ turn)

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.