Ignition Coil and Iridium Spark Plugs for Buick LaCrosse (2017-2019) 3.6L

OEM-Grade Direct-Fit Ignition Kit for 2017-2019 Buick LaCrosse

What it Does: Restores factory combustion efficiency and eliminates cylinder misfires across the entire RPM band for the direct-injected 3.6L V6 engine.

The Stock LaCrosse High-Heat Ignition Breakdown

The 3.6L LGX direct-injection architecture operates under high thermal loads and an 11.5:1 compression ratio. Over time, thermal cycling within the tight transverse engine bay degrades the factory coil-on-plug epoxy potting and primary copper windings. This internal insulation breakdown leads to high-voltage leakage, carbon tracking, and intermittent misfires, especially during high-load acceleration and Active Fuel Management transitions.

The Engineering Solution

This comprehensive ignition service kit features six high-output coil assemblies wound with premium electrolytic copper wiring and encapsulated in high-dielectric epoxy to resist thermal cracking. Paired with laser-welded fine-wire iridium spark plugs, this kit provides a concentrated spark kernel, reduces ionization voltage requirements, and maintains consistent arc stability under high cylinder pressures.

Technical Specifications

Compatibility

• 2017 Buick LaCrosse 3.6L V6 (Base, Essence, Preferred, Premium)
• 2018 Buick LaCrosse 3.6L V6 (Essence, Preferred, Premium, Avenir)
• 2019 Buick LaCrosse 3.6L V6 (Essence, Premium, Avenir, Sport Touring)

The Buick Refinement Caliber

Engineered to meet OE calibration tolerances, this direct-fit ignition upgrade ensures clean idle characteristics, instantaneous throttle response, and smooth powertrain NVH without triggering check engine lights or diagnostic trouble codes.