Ignition Coil Spark Plugs for Honda Ridgeline (2009-2014) 3.5L
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Direct-Replacement Ignition Coil & Iridium Spark Plug Kit for 2009-2014 Honda Ridgeline (YK1)
What it Does: The complete ignition coil and iridium spark plug kit replaces failing ignition components on the 2009-2014 Honda Ridgeline to restore secondary voltage output, eliminate misfires, and stabilize engine idle.
The Stock Honda Ridgeline Ignition Coil Breakdown
Under repeated thermal cycling, the factory coil-on-plug units in the J35Z5 3.5L V6 suffer from internal insulation decay and epoxy degradation. As internal windings break down and spark plug electrodes erode, coil resistance spikes. This thermal stress leads to voltage punch-through, spark blowout under heavy load, and recurring P0300–P0306 diagnostic trouble codes. Neglected coils and worn plugs cause stumbling under acceleration, rough idle, unburned hydrocarbon wash, and reduced fuel economy.
The Engineering Solution
This comprehensive tune-up kit replaces all primary and secondary wear components in a single service. The ignition coils feature high-temperature silicone boots, precision-formed internal magnetic cores, and high-dielectric epoxy filling to resist vibration and core saturation. Paired with fine-wire iridium spark plugs, the assembly lowers required arc-over firing voltage, promoting faster flame kernel growth and consistent combustion during high-load hauling and towing conditions.
What's Included
- 6x Black Coil-on-Plug Ignition Coils
- 6x Fine-Wire Iridium Spark Plugs
Technical Specifications
| Fitment | 2009-2014 Honda Ridgeline |
|---|---|
| Engine / Chassis | J35Z5 / YK1 |
| Stock Output | 250 hp / 247 lb-ft |
| Replaces OEM Part # | UF603, UF-603, 30520-R70-A01, 30520R70A01, 30520-R70-S01, 30520R70S01, 5C1681, E1103, 52-2036, IC693, C1624, CM11-213, 90207-RAA-A01, IZFR6K-11S |
Compatibility
- 2009-2014 Honda Ridgeline RT (3.5L V6 J35Z5)
- 2009-2014 Honda Ridgeline RTS (3.5L V6 J35Z5)
- 2009-2014 Honda Ridgeline RTL (3.5L V6 J35Z5)
- 2012-2014 Honda Ridgeline Sport (3.5L V6 J35Z5)
- 2014 Honda Ridgeline SE (3.5L V6 J35Z5)
Frequently Asked Questions & Fitment Warnings
Does this fit the YK1 Ridgeline?
Yes, this is a direct fit for the 2009-2014 Honda Ridgeline equipped with the 3.5L J35Z5 V6 engine across all factory trim levels.
Do the replacement coil boots require dielectric grease during installation?
Yes, applying a thin film of dielectric grease inside the silicone boots prevents moisture intrusion, arcing, and boot adhesion to the spark plug ceramic insulators.
The Honda Ridgeline Workhorse Standard
Maintaining peak ignition efficiency in the YK1 platform ensures your Ridgeline delivers reliable power delivery, consistent cold starts, and full towing capacity under rigorous load demands.
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