Ignition Coil and Iridium Spark Plugs for Scion FR-S (2015-2016) 2.0L

Direct-Replacement Ignition Coil and Iridium Spark Plug Kit for 2015-2016 Scion FR-S

What it Does: The ignition coil and iridium spark plug kit replaces degraded factory ignition components on the 2015-2016 Scion FR-S to eliminate misfires, restore high-RPM arc stability, and ensure clean combustion under heavy engine load.

The Stock Scion FR-S Ignition Failure Point

The horizontally opposed layout of the FA20 flat-four places ignition coils in extreme proximity to the cylinder heads and exhaust headers, leading to severe thermal saturation. Over repeated heat cycles, OEM coil insulation breaks down, causing micro-fractures in the potting epoxy and dielectric punch-through. This loss of insulation allows secondary voltage to arc to ground rather than across the plug gap, causing hesitation, irregular idle, and prominent misfires under load. Concurrently, factory spark plug wear increases resistance, forcing the coils to run hotter and hastening failure.

The Engineering Solution

Engineered to withstand the demanding thermal envelope of the ZN6 chassis, this complete ignition refresh kit pairs direct-fit pencil coils with fine-wire iridium spark plugs. The ignition coils feature high-grade magnetic core laminations and high-dielectric epoxy potting to resist thermal degradation and maintain consistent dwell timing. Paired with laser-welded fine-wire iridium plugs, the kit reduces ionization voltage requirements, producing an intense, focused spark kernel that optimizes flame-front propagation across direct and port injection cycles.

Technical Specifications

Compatibility

• 2015 Scion FR-S Base 2.0L H4 Gas (FA20)
• 2016 Scion FR-S Base 2.0L H4 Gas (FA20)
• 2016 Scion FR-S Release Series 2.0 2.0L H4 Gas (FA20)

Frequently Asked Questions

Does this fit the ZN6 FR-S?
Yes, this is a direct fit for the 2015-2016 Scion FR-S equipped with the FA20 engine.

Are the iridium plugs pre-gapped for this application?
Yes, the spark plugs are factory-gapped to OEM specifications; do not use mechanical wedge tools on fine-wire iridium tips to prevent damaging the electrode.

The Scion Performance Caliber

Maintaining clean combustion all the way to the 7,400 RPM redline requires reliable secondary ignition delivery. Eliminate high-RPM power drop-off and restore sharp throttle response with ignition hardware manufactured for aggressive street and track operation.