Ignition Coil and Iridium Spark Plugs for Mitsubishi Eclipse Cross (2018-2023) 1.5L

Direct-Replacement Ignition Coil and Iridium Spark Plug Kit for 2018-2023 Mitsubishi Eclipse Cross (GK1W)

What it Does: The complete ignition tune-up kit replaces deteriorating factory coil-on-plug packs and worn spark plugs on the 2018-2023 Mitsubishi Eclipse Cross to eliminate high-boost misfires, stabilize idle fluctuations, and restore combustion efficiency.

The Stock Mitsubishi Eclipse Cross Ignition Breakdown

The turbocharged direct-injection architecture of the 4B40 engine subjects secondary ignition components to intense thermal cycling and elevated cylinder pressures. Over time, OEM coil packs suffer internal dielectric breakdown as internal epoxy potting degrades under sustained heat soak. This weakens output voltage, allowing high cylinder pressures under boost to blow out the spark. Concurrently, factory plugs experience ground electrode erosion and carbon accumulation, increasing resistance and overworking the primary coil windings. The result is sluggish throttle response, fuel dilution, rough idling, and recurring P0300-P0304 misfire diagnostic trouble codes.

The Engineering Solution

This kit provides an integrated overhaul engineered to match direct-injection forced induction demands. The coil-on-plug units feature high-grade copper windings insulated with premium thermoset epoxy to prevent internal arcing and voltage drop across the 3-blade factory connection. Paired with fine-wire iridium spark plugs featuring a durable 12mm thread and 26.5mm reach, the narrow center electrode requires significantly less firing voltage to establish a stable flame kernel under load. Pre-gapped to 0.805–0.9695 mm, these iridium plugs resist spark erosion and thermal fouling far better than conventional nickel alloys.

What's Included

• 4x Coil-on-Plug Ignition Coils (Black, 3-Blade Connector)
• 4x Fine-Wire Iridium Spark Plugs

Technical Specifications

Compatibility

• 2018 Mitsubishi Eclipse Cross 1.5L L4 Turbo (ES, LE, SE, SEL)
• 2019 Mitsubishi Eclipse Cross 1.5L L4 Turbo (ES, LE, SP, SE, SEL)
• 2020 Mitsubishi Eclipse Cross 1.5L L4 Turbo (ES, LE, SP, SE, SEL)
• 2022 Mitsubishi Eclipse Cross 1.5L L4 Turbo (ES, LE, SE, SEL)
• 2023 Mitsubishi Eclipse Cross 1.5L L4 Turbo (ES, LE, SE, SEL)

Frequently Asked Questions & Fitment Warnings

Does this fit the GK1W Eclipse Cross?

Yes, this is a direct fit for the 2018-2023 Mitsubishi Eclipse Cross equipped with the 4B40 1.5L turbo engine. Note: This kit does NOT fit older naturally aspirated Eclipse sports coupes, nor does it apply to the 2021 model year as no North American models were produced.

What is the recommended installation torque for the spark plugs?

Torque spark plugs to 15-20 N.m (11-15 lb-ft) into the aluminum cylinder head to avoid thread galling or improper heat dissipation.

The Mitsubishi Performance Standard

Modern direct-injected Japanese powertrains require exact ignition calibration to maintain balanced fuel trims and responsive low-end boost delivery. Rejuvenating your ignition circuit with matched coils and iridium plugs ensures clean, knock-free combustion across every drive cycle.