Ignition Coil + Iridium Spark Plugs for Subaru Tribeca (2011-2014) 3.6L

OEM-Grade Ignition Coil and Iridium Spark Plug Kit for 2011-2014 Subaru Tribeca (WX)

What it Does: The ignition coil and Iridium spark plug kit replaces aged ignition components on the 2011-2014 Subaru Tribeca to restore high-voltage secondary output, stabilize idle quality, and eliminate engine misfires.

The Stock Subaru Tribeca Ignition Breakdown

The horizontally opposed layout of the EZ36D 3.6L engine places the ignition coils in direct proximity to the cylinder heads and exhaust routing, subjecting coil boots and primary/secondary windings to sustained thermal stress. Over time, internal potting epoxy degrades, triggering secondary winding resistance drift and dielectric casing breakdown. This insulation failure leads to micro-arcing and intermittent spark discharge under load. Compounded by widened spark plug gaps from electrode erosion, the weakened ignition energy results in OBD-II misfire codes (P0300–P0306), unburnt fuel dumping into catalytic converters, and sluggish off-idle throttle response.

The Engineering Solution

This comprehensive ignition tune-up kit delivers direct-fit coil-on-plug units built with thermal-resistant thermoplastic housings, copper windings, and high-dielectric epoxy to prevent voltage leakage under high-load operating conditions. Paired with Denso Iridium (IKH20) spark plugs featuring an ultra-fine 0.4mm laser-welded iridium center electrode, the system lowers required firing voltage, provides superior flame kernel propagation, and maintains exact gap tolerances against erosion.

What's Included

• 6 Direct-Fit Ignition Coils
• 6 Denso Iridium Spark Plugs (IKH20)

Technical Specifications

Compatibility

• 2011 Subaru Tribeca 3.6L H6 (Base, Limited, Premium, Touring)
• 2012 Subaru Tribeca 3.6L H6 (Base, Limited, Premium, Touring)
• 2013 Subaru Tribeca 3.6L H6 (Limited)
• 2014 Subaru Tribeca 3.6L H6 (Limited)

Frequently Asked Questions & Fitment Warnings

Does this fit the WX Tribeca?

Yes, this is a direct fit for the 2011-2014 Subaru Tribeca equipped with the EZ36D 3.6L engine; it does not fit older 3.0L EZ30 models or non-Subaru applications.

Why should ignition coils and spark plugs be replaced at the same time?

Replacing coils and spark plugs together ensures matched impedance across all cylinders and prevents worn plug gaps from over-stressing new primary ignition coil drivers.

The Subaru Boxer Caliber

The horizontally opposed EZ36D boxer six relies on symmetrical, balanced cylinder firing to maintain smooth rotational mass and steady power delivery through Subaru's Symmetrical All-Wheel Drive system.