Send high-voltage spark to each plug in firing order with the Standard Ignition Distributor Rotor JR-128. It is a direct-fit replacement for the 1989-1992 Mazda MPV. See the "Vehicles it fits" section for engine-specific details. The rotor mounts on the distributor shaft and turns inside the distributor cap. As it sweeps past each outer terminal, it passes current from the center terminal to that terminal, which routes spark voltage to the plug wires.
Signs a distributor rotor may need replacing include misfires, hard starting, rough running or a no-start condition. You may also see a burned or eroded rotor tip, cracks, or carbon tracks when the cap is removed. Other ignition components can cause the same symptoms, so diagnose the cause before replacing parts, and inspect the distributor cap at the same time.
Interchange: D679 · MM502535 · JA983 · RTRA106 · EP846 · 12353190 · JE0118V05 · JE0118V0591 · JE0118V059U · EP846SB · JR128T
This part cross-references / interchanges with the following part numbers:
What vehicle does the Standard Ignition JR-128 fit?
It is listed for the 1989-1992 Mazda MPV. See the "Vehicles it fits" section for engine-specific fitment details.
What does a distributor rotor do?
It mounts on the distributor shaft and turns inside the cap. It passes high-voltage current from the center terminal to each outer terminal so spark reaches the plugs in firing order.
What are the brass segments for?
Standard Ignition uses solid brass segments on its distributor rotors for better conductivity and a higher-voltage spark delivered to the spark plugs.
How does the alkyd material help?
The high-grade dielectric strength alkyd resists dirt sticking to it. This helps decrease carbon tracking, which is a stray conductive path that spark voltage can follow.
What are signs my distributor rotor may need replacing?
Possible signs include misfires, hard starting, rough running, or a burned tip or carbon tracks on the rotor. Other ignition parts can cause similar symptoms, so diagnose before replacing.
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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.
