Champion Spark Plug Spark Plug P/N:404
Champion Spark Plug 404-1 spark plug for the 1968-1979 Toyota Corolla 1.1L / 1.2L / 1.6L and other vehicles creates the spark that lights the air-fuel mixture in its cylinder so the engine starts and runs.
A worn spark plug can show up as hard starting, a rough idle or a misfire you feel when accelerating. Before you replace this plug, rule out a cracked ignition wire, a weak coil and a vacuum leak, because each of those can bring on the same symptoms.
It is a standard replacement plug that also fits the 1984 Honda Civic 1.3L and the 1984-1995 Toyota 4Runner 2.4L. The other vehicles it fits, with their engines, are in the "Vehicles it fits" section.
Fit and size
Build and materials
In the box: one spark plug; the number needed depends on the engine.
Will the Champion 404-1 fit a 1984 Honda Civic 1.3L or a 1984-1995 Toyota 4Runner 2.4L?
Yes. Champion Spark Plug 404-1 fits the 1984 Honda Civic 1.3L and the 1984-1995 Toyota 4Runner 2.4L, and the "Vehicles it fits" section shows the other vehicles it fits.
I'm comparing Denso and iridium spark plugs for a 1968-1979 Toyota Corolla 1.1L / 1.2L / 1.6L. What type is this one?
This is a Champion Copper Plus RN12YC plug, not a Denso or iridium plug. It has a copper core center electrode with a nickel tip and fits the 1968-1979 Toyota Corolla 1.1L / 1.2L / 1.6L.
What thread size and seat does the RN12YC spark plug have?
This spark plug has a 14 mm (0.551 in) thread and a flat seat.
Is the Champion RN12YC a resistor spark plug?
Yes. This Copper Plus plug has a resistor built in, which cuts down electrical interference to help protect sensitive electronics.
Does the Champion 404-1 come pre-gapped with a washer?
Yes. Champion Spark Plug 404-1 comes pre-gapped to 0.035 in (0.89 mm) and includes a crush washer, which simplifies installation.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.