At JC Whitney, we offer the best selection of Toyota 4Runner Electrical Systems parts and accessories. We offer an industry leading ONE YEAR GUARANTEE so that you can shop with confidence! Narrow your selection below by providing the year of your vehicle for a custom list of Toyota 4Runner Electrical Systems products.

Guaranteed to Fit
E3 AUTOMOTIVE SPARK PLUGS
Fits Toyota 4Runner
Read 37 Reviews
E3™ AUTOMOTIVE SPARK PLUGSProduces more power, reducing fuel consumption while cutting harmful toxic emissions. More
NGK G-POWER SPARK PLUGS
Fits Toyota 4RunnerNGK COMMERCIAL SERIES SPARK PLUGS The spark plugs have corrugated ribs to help prevent "flashover" of spark. Highly pure alumina silicate... More
DENSO IRIDIUM POWER SPARK PLUGS
Fits Toyota 4Runner
Read 1 Review
DENSO IRIDIUM POWER SPARK PLUGS Iridium (extracted from meteorites) is far superior to platinum-;it's harder, stronger and able to take... More
DENSO RESISTOR U-GROOVE SPARK PLUGS
Fits Toyota 4RunnerDENSO RESISTOR U-GROOVE SPARK PLUGS Denso Resistor U-Groove Spark Plugs are OE-quality replacement plugs feature RFI Resistor (radio frequency... More
DENSO DOUBLE-PLATINUM SPARK PLUGS
Fits Toyota 4RunnerDENSO DOUBLE-PLATINUM SPARK PLUGS Denso Double-Platinum Spark Plugs far outlast conventional spark plugs. Built like a tank, double-platinum... More
REPLACEMENT COIL PACK IGNITION COIL
Fits Toyota 4RunnerHard to start? That might be a symptom of a coil failure. More
DENSO LONG LIFE IRIDIUM SPARK PLUGS
Fits Toyota 4RunnerDENSO LONG LIFE IRIDIUM SPARK PLUGS Denso Long Life Iridium Spark Plugs are fast becoming the No. 1 choice for today's high tech engines... More
NGK IRIDIUM IX SPARK PLUG
Fits Toyota 4RunnerNGK IRIDIUM IX SPARK PLUG The ultra-fine center electrode is designed not to thin to ensure maximum durability and life of the spark... More
BOSCH PLATINUM 4 SPARK PLUGS
Fits Toyota 4RunnerBOSCH PLATINUM 4 SPARK PLUGSBosch Platinum+4 spark plugs deliver the best in platinum performance over the longest service life. Platinum... More
BECK ARNLEY OE REPLACEMENT IGNITION COIL
Fits Toyota 4RunnerBeck Arnley OE Replacement Ignition CoilEngineered from specifically chosen materialsExtended service life guaranteedBeck Arnley OE Replacement... More
BOSCH ALTERNATOR
Fits Toyota 4RunnerBOSCH ALTERNATORSBosch Alternators have been specially engineered for maximum charging power. A Bosch High Output Alternator makes an excellent... More
ALDOR HIGH-VOLTAGE SPARK PLUG SETS
Fits Toyota 4Runner
Read 3 Reviews
ALDOR™; HIGH-VOLTAGE SPARK PLUG SETS Engineered for motors using excessive oil. More
NGK G-POWER SPARK PLUG
Fits Toyota 4RunnerNGK G-POWER SPARK PLUG The world's first platinum spark plug specifically designed to replace conventional plugs and off the performance... More
DENSO IGNITION WIRE SET
Fits Toyota 4RunnerDENSO IGNITION WIRE SETDENSO can guarantee the quality of the product they produce because every component that leaves their factories... More
PRESTOLITE SPARK PLUG WIRE
Fits Toyota 4RunnerProConnect™ aftermarket ignition wires are especially designed for professional installation. They are made to meet OE/OES specifications... More
