Ignition Coil and Iridium Spark Plugs for Scion iQ (2012-2015) 1.3L

Direct-Fit Ignition Coil & Iridium Spark Plug Kit for 2012-2015 Scion iQ

What it Does: The ignition coil and iridium spark plug kit restores secondary ignition voltage and combustion efficiency on the 2012-2015 Scion iQ to eliminate cylinder misfires, rough idle, and engine hesitation under load.

The Stock Scion iQ Ignition Coil Thermal Breakdown

In the cramped engine bay of the NGJ10 chassis, severe thermal cycling and localized heat soak degrade the factory coil packs over time. The stock 1NR-FE cylinder head packs components tightly, causing OEM epoxy insulation to develop micro-fractures. These internal breakdowns lead to high secondary winding resistance, spark energy leakage, and dielectric punch-through. Paired with aged spark plugs suffering from widened electrode gaps, the compromised factory ignition system induces P0300 through P0304 diagnostic trouble codes, poor fuel atomization, increased emissions, and premature catalytic converter degradation.

The Engineering Solution

This comprehensive ignition service kit restores factory dwell performance and primary-to-secondary saturation. The four pencil coils utilize impact-resistant thermoplastic housings vacuum-impregnated with high-grade dielectric epoxy, preventing high-voltage tracking and flashover under heavy engine loads. Matched with fine-wire iridium spark plugs featuring a laser-welded 0.6mm center electrode, this setup significantly reduces the ionization voltage threshold needed to bridge the gap. The result is rapid flame-front propagation, consistent thermal dissipation across cold-start and high-RPM conditions, and direct-fit reliability that replaces OEM part 90919-02257.

Technical Specifications

Compatibility

• 2012 Scion iQ Base 1.3L L4 (1NR-FE)
• 2013 Scion iQ Base 1.3L L4 (1NR-FE)
• 2014 Scion iQ Base 1.3L L4 (1NR-FE)
• 2014 Scion iQ Monogram 1.3L L4 (1NR-FE)
• 2015 Scion iQ Base 1.3L L4 (1NR-FE)

Frequently Asked Questions

Does this fit the NGJ10 iQ?
Yes, this is a direct fit for the 2012-2015 Scion iQ equipped with the 1NR-FE 1.3L engine.

Are the iridium spark plugs pre-gapped for installation?
Yes, the plugs are pre-gapped to factory service specifications, requiring no manual adjustment prior to installation into the cylinder head.

The Scion Standard

Compact JDM platforms demand absolute ignition precision to maximize fuel economy and maintain smooth power delivery throughout the rev band. This direct-replacement kit brings factory-calibrated electrical performance back to your daily commute.